Car Idles But Dies With Throttle

This is a rebuilt 2. On deceleration, engine rpms may fall below normal idle speed and stall. Then, when it does start, I have to keep giving it gas for a couple minutes because if I just let it idle the engine dies. It's been stalling randomly at idle, then last Thursday started idling really rough and bucking. see the fall 2007 issue of our bavarian autosport fast times newsletter, which contains a diy article on diagnosing “no start” issues. 10 minutes later I start the car back up and it is back to normal idle, but it dies as I put it into reverse. Do idle fees apply if there are Supercharger spots still available? Idle fees apply to any car occupying a Supercharger if the station is at least 50% full and the charge session is complete. e30 idle stall. Car starts fine. It could be a couple other things, too, but those are the most common and first things you should explore. I am new to this page and I need some help. I never had this kind of. Hey, So I got my car, (Subaru Impreza 2000 RS 2. Mar 16, 2011 · 1) You went to move your car, so you started it (cold start), and it started fine. The car won't start up if I don't give it a gas or keep the throttle open I guess???. I've thought it might be the air or gas filter, but I'm not sure. The idle control valve, also called the idle air control valve, is found in the throttle body of your Lincoln Town Car and is the piece of equipment responsible for keeping the car running at a smooth idle when stopped, with the engine running but the accelerator pedal not being pressed. when that happens, the air can't get around the closed throttle plates to support the engine idle so the car stalls. i didnt really pay. Express Auto Inspections says: While modern vehicles use a fuel injector system to burn gas, many older cars use a carburetor to process fuel. The alternator should be able to charge a battery at an idle. I have a 02 Ford focus 2. If the switch gets hit, the fuel gets cut (see (*) above). The car starts up immediately (better than my e24) without having to give it any throttle. ) When engine ran well, all devices seemed to be working correctly, Idle up did work fine, any time lights or A/C came on engine would idle up correctly. Car runs fine when cold, but if left idle, once warm, idles extremely rough, and dies out when attempting to drive after warm up. Oct 01, 2008 · "You can expect to pick up one- to three-tenths in the quarter with a custom carb in a typical street/'strip car, but an even bigger benefit is the improved idle quality, throttle response. We just changed the oil (5w30 full syntehtic). I immediately put the car in park, and pressed the accelerator and exited highway and continue driving on streets for 5 more miles. 5 volt reading when engine is off and 14. the hsn really has little. 5) and its has a pulsing Idle. It always immediately starts back up. PROBLEM NOT SOLVED; during this tinkering, notice that when MAF is unplugged, car idles steady. The symptoms include stalling when coming to a stop, or very low idle after starting, or stalling if the throttle is "blipped" (opened and closed quickly). but it isnt. My car is currently at the dealer for a similar issue. Because I don't do much driving I continued to drive the car very lightly and carefully. Although the main things have been checked, filter, carb, etc but all seem fine and still no luck in getting her to stay going. And this car is a year old and is finally getting to see action. the hsn really has little to do with the idles side of the carb. An AIC unit can go bad by short circuiting and stop working or build up a high electrical resistance. My car is currently at the dealer for a similar issue. Some of the time the idle will be irratic when in park, but put it in drive and the idle goes back to normal--but same thing, press gas and it dies. It could be a vacuum leak or an idle air control valve. The second attempt, I gave it some throttle after it started firing, and all was well. If it still dies with. Hopefully you’re now able to start. First I will show you a video of such a rough idle and then list the possible problems that may cause that. Spark Plugs Damaged spark plugs could create this car shakes when idle. I would start by by cleaning the throttle body since that's simple and basically free, but it does sound like a sensor issue if it dies while accelerating. I can start it again and it will only stay running if I pump the gas pedal CONSTANTLY. But when you let off of throttle from top end it usually dies. My battery on the chaser went flat so jump started the car, drove it home and charged the battery overnight. In this topic, Solving Idle Problems, is a recap of the entire series of topics for What to Do When you have engine idle issues. In gear it idles at a little above 1000 rpm. stop light) and upon acceleration, car dies. Got into the car for lunch and it starts up fine, but won't idle - rpm just drops down then it's off. I was able to. Although the main things have been checked, filter, carb, etc but all seem fine and still no luck in getting her to stay going. see the fall 2007 issue of our bavarian autosport fast times newsletter, which contains a diy article on diagnosing “no start” issues. The car started initially and the idle was around 1200RPM. If your car stalls out at red lights, it means that your engine suddenly can’t control the idle. The problem is I can't idle in gear. probably one of the first things i did because i thought the problem was afm related. Just started it up after it sitting overnight and the rpms are high now at idle. USUAL CAUSE The usual cause of abnormally high idle speeds are vacuum leaks or an inoperative idle speed control motor. Once it steadies out, it idles perfect. Car dies at idle. which i fix already. car has been sitting for a few years. or stall when coming off the throttle with the. therefore, you’ll need to be prepared to do some testing when the symptoms occur. In this topic, Solving Idle Problems, is a recap of the entire series of topics for What to Do When you have engine idle issues. rough idle when cold - goes away after warm up oem issues. The battery goes down to 2 bars and the engine has to kick in to charge the battery. I am in contact with HONDA corporate but no one can seem to find what is causing my car to stall. During 5 minute crap idle time, car will not tolerate any accelerator input. Idle fee rates double when the station is 100% occupied. May 07, 2016 · now onto an even bigger issue, is that i cant even drive the vehicle because whenever it goes into gear, it falls on its face and dies unless im feathering the throttle while holding the brakeor shifting the car back into neutral or park to allow the idle to return to normal (1k). When I unplugged the MAF sensor the car runs also on idle but pretty rough (surging up and down). The fix for me was simple. a faulty throttle position sensor can cause an engine to suddenly stall. I am new to this page and I need some help. 2010 chevrolet equinox engine problems. so for the p…. That's the idea behind pressing the gas pedal before starting it when cold, it sets the fast idle as well as the choke and a shot of gas. The car is a bit hard starting, but nothing really worth talking about in this posting. 5 volt reading when engine is off and 14. Wait 10-15 seconds so the electronic throttle body or IACV has time to go to the factory programmed home position. The Check engine light came on while driving and engine shut off. 944s2 randomly dies out while driving and at idle I was able to get the car to drive at a quarter throttle but any more and it would cut out ? The car still. , giving it some gas) but when I have to stop for a light or traffic, the RPMs start to drop and unless I catch it and give it some gas, the car dies. Sometimes RPMs go down to 400 and car is OK (but battery light comes on for a second) and sometimes RPMs go straight down to zero. Having some issues with our 04 liberty v6 4x4. Second video with green wire connected to ECU side of KS. After cleaning the camshaft sensor, the check engine light cleared off and the car would start and idle, although it still had an engine knock (this knock was never noticed before the engine died). JEEP LIBERTY CHEROKEE Rough Idle and part throttle stutter Hi everyone Hoping to get some help. unfortunately, we can only diagnose your dying/stalling and no-start issue while it is actively happening. This has been occurring for the past 2 months. Ok, I'm having a really weird problem that REALLY sucks. But after a little while the idle starts surging. After resetting my battery terminals yesterday while wiring some switches, I turned my truck on and it immediately stalled and died. A few days later. Immediatley after the first couple stalls it began losing power and eventually die while stopped. The car is idle fine but when shift in to Drive it go for 5-6. Car ran fine for past few months since I got it (even though I had only a few hours of drive time on her) - Installed new exhaust and J tubes. Cold start: I can drive for 1 minute and then the idle is really rough, going from 1000 rpm to 1500 rpm back to 1000 rpm and fighting for its life to stay on, almost dies (but never has died on idle). The car started initially and the idle was around 1200RPM. Ditto for my 1990 245DL. Re: 1992 club car. The fix for me was simple. If you unplug the ISCV the spring loaded pintle inside should. -replaced injectors. Just started it up after it sitting overnight and the rpms are high now at idle. We towed the car home. Is you carburetor causing a problem when you stop at a stop sign or just want to let it warm up in the morning? These are common problems related to the idle. When it dies it doesn't sputter, its just as if I tuned the key off. As your car rolls along, the engine takes in a mix of air and fuel that allows it to keep moving. I can turn it right back on and drive away like there's nothing wrong? It only happens when my car is at an idle, but driving wise it's fine no problems. For more formal atmosphere hop over to the Technical Forum. Car Idles Fine, Give It Gas And Wants To Die. The throttle body sensor (TPS) may be bad. half a year ago i noticed the idle problem just like u descibed, when i start the car engine has like 1400-1500 rpms and when it cools down it drops to 600, but agter i drive the car for a few mins the idle drops to 400, it doesnt matter if the tranny is in P or D but after revving the engine it goes away, but not always. If you're Elantra runs fine, except when you pull up to a light, slow down or idle and the engine sputters to a stop, this might be your issue. After looking at my engine for anything that looked out of place, I couldn't find anything. You'll hear it prime if it's working. The car does just fine when the RPMS are kept above 1000 or so and there is plenty of power while driving and at wide open throttle, but once it is allowed to sit at idle it stumbles and dies, I have to jump the relay for a few seconds to get fuel and then start it and keep those rpms up. About 3 times over the last week, the car stalled during this sporactic rev-ing within 2-3 mins of me starting the car. On deceleration, engine rpms may fall below normal idle speed and stall. Ok so at first I thought the idle speed was too low, but that did work. The car would stall 2 or 3 times on the way to and from work. Carbon buildup on the throttle body can cause rough idle and hesitation. I start my car and the idle goes up & goes down, and starts hunting or surging until it steadies out. If your idle stays at 1500 all the time, most likely it is the electronic idle speed regulation. the in tank fuel pump & filter has been replaced. But when you let off of throttle from top end it usually dies. At home: Replaced ICV valve; cleaned MAF with MAF cleaner (no q-tips, only spray). The follwing days after, the car would start rough, idle rough for maybe 2 minutes, the die. Once I get going for awhile I don't have any issues and can come to a stop without any issues and car idles. Check the Clamps on the Plastic Tube & Flexible hoses that run from the top of the Air Cleaner box all the way back. I'm completely confused with what is going on with my car. morning all. If I hold the ignition key in the run position it seems to continue to run…. JEEP LIBERTY CHEROKEE Rough Idle and part throttle stutter Hi everyone Hoping to get some help. Engine will shake and feel as though it’s about to die. -if I cruise at. yup check afm and ic piping already. In this topic, Solving Idle Problems, is a recap of the entire series of topics for What to Do When you have engine idle issues. The symptoms include stalling when coming to a stop, or very low idle after starting, or stalling if the throttle is "blipped" (opened and closed quickly). Got into the car for lunch and it starts up fine, but won't idle - rpm just drops down then it's off. Dirty Fuel Injector Modern vehicles are fitted with fuel injection systems, which inject fuel into the cylinders to create a mix of air and fuel to burn. I did suggest checking hoses, and hissing is a dead give-away of a vacuum leak. You'll hear it prime if it's working. We just changed the oil (5w30 full syntehtic). The car started fine and drove ok. the in tank fuel pump & filter has been replaced. May die repeatedly during this time. Mar 16, 2011 · 1) You went to move your car, so you started it (cold start), and it started fine. 0 sp single cam the car will start and idle fine but if you give it gas it will sputter and try to die but you let off I will Rev up some and then idle fine again I have rep. stop light) and upon acceleration, car dies. My car (2000 s2000) has been running fine when driven at low rpm. Probably the most common problem that causes idle problems in multiport fuel injected engines is a carboned-up throttle body. The car does just fine when the RPMS are kept above 1000 or so and there is plenty of power while driving and at wide open throttle, but once it is allowed to sit at idle it stumbles and dies, I have to jump the relay for a few seconds to get fuel and then start it and keep those rpms up. Car dies: Car Idles Fine Then Dies: Car Sputters And Dies At Idle Help: Car Idles Fine, Give It Gas And Wants To Die. If the idle air valve is wide open trying to boost the idle, it can hiss loudly. I've thought it might be the air or gas filter, but I'm not sure. SYMPTOM SUMMARY The engine idles too high. it works flawlessly except for the idle. But in the correction it never fully corrects itself so its always decreasing. Once it steadies out, it idles perfect. Jan 05, 2016 · You may have a misfire, a vacuum leak, or a clogged/faulty idle air control valve. Stock '12 GTI Starts, rough idle, then dies sometimes I bought a 2012 GTI with 6-speed manual two weeks ago. Also I noticed today that the rpm drops so low in the. To test it, Brian Minnebo suggested the following (which requires the TPS to be off the car): Apply a 5v (DC) power source and ground to the TPS. Mar 16, 2011 · 1) You went to move your car, so you started it (cold start), and it started fine. Has the car ever idled properly during the time you have owned it. If your car stalls out at red lights, it means that your engine suddenly can’t control the idle. The car doesn't drive, and we haven't been able to drive it for months. If I go back to Drive from Neutral the car will run fine for a while, but the idle will get rough again when I stop at a stop light. In this topic, Solving Idle Problems, is a recap of the entire series of topics for What to Do When you have engine idle issues. which i fix already. My question is in regards to my 2003 Ford Escape. Average failure mileage is 73,600 miles. stop light) and upon acceleration, car dies. Engine: Engine Will Idle But Dies At Full Throttle. Engine will shake and feel as though it’s about to die. What I meant is, it is definitely NOT on right now, I can't remember if when we started trying to fix it months ago if it ever came on and is now off, because we have reset the computer, and all that. the fuel pump is vacum. How to fix it. The battery goes down to 2 bars and the engine has to kick in to charge the battery. May die repeatedly during this time. the second it starts up its at about 1300 to 1650rpm. After looking at my engine for anything that looked out of place, I couldn't find anything. For some reason, your car chooses that moment to stall out. Car dies when I turn the wheel at idle: 2010 gt threw a code saying both banks 02 sensors lean conditions. One source of poor idle is a nonworking air idle control unit (AIC). a faulty throttle position sensor can cause an engine to suddenly stall. Possible cylinder head or valve damage on the GM 2. An engine that is idling too high may be caused by a faulty idle air control motor valve that has completely failed or that has simply become weak and is not functioning correctly. My car did this for over 2 years. Car restarted fine after test but went to high idle again. Hi Guys, my car won't idle, it started playing up a couple of days a ago, where it kept dying after I started, but then it came right. Here's a tip for those who might be frustrated by an engine that seems to run great at idle,but either refuses to rev up when the throttle is opened,or sputters and spits and runs erratically if you do happen to coax it above idle. yup check afm and ic piping already. I left the car idling for a minute yesterday, and it suddenly died while i was closing my garage door. Jan 30, 2019 · A really cold start is quite rough with E85, as is a warm restart. 4L 4-cylinder) has started stalling on me when I come to a stop, but only when the engine Car stalling when coming to a stop (when engine warm) (idle, fuel) - Automotive -Sports cars, sedans, coupes, SUVs, trucks, motorcycles, tickets, dealers, repairs, gasoline, drivers. , giving it some gas) but when I have to stop for a light or traffic, the RPMs start to drop and unless I catch it and give it some gas, the car dies. Then the engine will run (with throttle applied) smoothly in the 2-4k rpm range. Having some issues with our 04 liberty v6 4x4. A Very Special Ford GT40. Common reasons include vacuum leaks, carburetor problems, ignition issues, damaged power circuits and dirty fuel injectors. Check the Clamps on the Plastic Tube & Flexible hoses that run from the top of the Air Cleaner box all the way back. So just recently my truck decided that it wanted to act up. I was no exception. Starts up cold for one second, then dies. Issues in the fuel system could also be a reason for car shakes when stopped. asked Mar 11, 2017 by. If the engine dies, what you want to be paying attention to is not just the fact that it dies, but exactly how it dies. Although the main things have been checked, filter, carb, etc but all seem fine and still no luck in getting her to stay going. After it warmed up I drove to the interstate where I got on it in 2nd gear and 3rd gear. My friend has a 1991 Chevrolet Silverado pickup truck V8 c1500 5. If you can't hear the motor at all, the pump may be dead or a fuse blown. car starts easy, but won't hold an idle & dies out 17 answers. help please Discussion in '4th Gen Camaro LT1 (1993-1997 Camaro)' started by voltz77, Feb 9, 2019. Hold the gas pedal down a little bit while you're sitting still. › help! 72 302 won't idle more than 10 seconds. How do I know when I’ve incurred an idle fee?. Now, I have a new, overly-pricey Porsche OEM MAF sensor, a cleaned-up throttle body, both of which cleared the “check-engine” light but still left the car with that annoying up-and-down idle. half a year ago i noticed the idle problem just like u descibed, when i start the car engine has like 1400-1500 rpms and when it cools down it drops to 600, but agter i drive the car for a few mins the idle drops to 400, it doesnt matter if the tranny is in P or D but after revving the engine it goes away, but not always. Diagnosing RPM Idle Issues in a MINI Cooper Posted on May 6, 2016 by Insourcelife Back in 2012 I bought a 2009 MINI Cooper hatchback to replace the aging 2004 BMW 330i ZHP that was rapidly approaching the point where a bunch of expensive work would be needed on a regular basis. The car reportedly drove fine for the PO but sat for a couple years before I bought it. The only time my idle chugged, is when I started it after it had been sitting for 5 days, and the overnight low was 32F. Jun 11, 2011 · alright here it goes, I have an 89 240sx with a ka24de swap, and it hardly runs, when we got it we thought it may have been a clogged fuel filter or a vacuum leak, we have tried evereything we can think of, messed with all of the timing, compression test, new spark plugs, wires, rotor and cap, we checked for clogged cat and it wasn't that, im ready to sell the car and take a huge loss because. If the car idles for a second or two and then dies, there could be other problems. Then it dies. Car Idles Fine, Give It Gas And Wants To Die. The car pulled nicely but when I pushed the clutch in to slow down, the car died. but it isnt. the in tank fuel pump & filter has been replaced. Now I think its something simpler. just above the 0 rpm mark, basically no idle. The idle is very slightly rough, but still smooth when compared to most cars. Here is what I've tried Cleaned throttle body Checked fuel pressure (51 PSI exactly). The fix for me was simple. Dirty or exhausted plugs cannot. The car idles around 750 rpm according to the tach. Try leaving your car idle in neutral and adjust the idle down to the same rev's it idles at while its in drive and see if it starts to miss. by Kyle McFadden. Car is in Park, I start the car, car starts and dies, won't idle. May 26, 2019 · Dan Ferrell writes about do-it-yourself car maintenance and repair. However, it revs and revs well. A quick swift to a new fuse and in a second the "check engine" light came off and the car was able to rev and also accelerate. Now it cranks just fine, but won't start! WTF As anybody had this happen before? I never had a problem like that in the past. Now the car will start when you disconnect the air filter tube from the throttle body and cup you hand over the inlet just rightsounds wierd i know but it does help it start. the engine will still start but still the stumbling. If I go back to Drive from Neutral the car will run fine for a while, but the idle will get rough again when I stop at a stop light. car accelerates smoothly. I was able to. Taking car in to pull codes today. Because I don't do much driving I continued to drive the car very lightly and carefully. It could be a couple other things, too, but those are the most common and first things you should explore. - Car ran fine, I had it idle for 15 minutes or so while the low temp paint was burning off - Made it a block and upon accelerating the car dies - Backfires up through carb. The additional fuel at idle was causing the car to idle poorly and occasionally stall or flood. Discuss engine starts then dies (lincoln towncar)? in the alt. I feel that its as soon as you try chucking pet through it dies. I'm hoping that having his head under the hood he would be able to locate a brake booster hose. Sep 29, 2018 · Car starts then dies Faulty throttle position sensor. 5K (duh lol) and dies once throttle is release (will not hold idle. Jan 25, 2013 · For some reason, your car chooses that moment to stall out. Bottom Line: When setting the idle, don't be TOO afraid of turning in the Volume Control Screw all the way, then 2-1/2 turns out. download e30 stalls at idle free and unlimited. If it still dies with. Engine will shake and feel as though it’s about to die. Has a quadrajet carb, new fuel pump and filter, new points, condensor, new coil. but it isnt. I let it idle for about 5 min then shut it down and cleaned up my tools. On cold starts the engine seems to run fine in idle but stutters a lot in 1st gear. What could be causing my Toyota to idle rough when it is cold outside? What could be wrong if my F-150 truck has a high idle on start up and then dies? What could be wrong with my Volvo if I hear a noise and feel shaking while idling? Why won't my car idle?. You'll hear it prime if it's working. Discuss 1990 TBI 5. stop light) and upon acceleration, car dies. Mar 11, 2009 · Idles fine but dies upon throttle Sign in to follow this. When the engine is started cold, regardless of the outside temperature, the idle is rough and there is a noticable power loss. I was able to start it again, but if I. see the fall 2007 issue of our bavarian autosport fast times newsletter, which contains a diy article on diagnosing “no start” issues. Sep 07, 2012 · Car dies at idle. As your car rolls along, the engine takes in a mix of air and fuel that allows it to keep moving. I can not figure out what is wrong with my car I really can not afford to take it to the shop so I'm trying to see if I can fix it on my own. Problem: After driving about 2 miles, on traffic lights RPMs go down and car stalls on idle. com, there are several reasons vehicles idle low. My battery on the chaser went flat so jump started the car, drove it home and charged the battery overnight. Sep 25, 2002 · ZJ dies at start up/idle, HELP!!! Jeep Friends Forum. When the car is warm my idle is very very low. car starts and idles but wants to die if press gas 13 Answers. Next day I cleaned and tested Idle air control valve, which was sooty, and also cleaned throttle body which was not so dirty. Sometimes it dies while backing out of a parking space. just above the 0 rpm mark, basically no idle. will idle but dies when try to accelerate. 4 motor won't idle, runs ok do these things have a - Honda CR-V question. the in tank fuel pump & filter has been replaced. After looking at my engine for anything that looked out of place, I couldn't find anything. But car won't stay in idle by itself…. I've thought it might be the air or gas filter, but I'm not sure. Car starts for a sec then just dies, wont hold idle. 4) Before you start the car for the first time, turn the key to the ON position but do NOT turn the engine over. We towed the car home. There is also a build up of carbon called coking; it is behind the throttle plate. Jeep Friends Forum This is a forum for jeep friends to hang out. According to About. The car idles around 750 rpm according to the tach. When a car dies at idle, the last thing that drivers think of is a problem with the spark plugs. does any one know if it could be high speed or low speed set too rich or lean. i just need to rewire the front one. Battery died, now car wont idle. The car won't start up if I don't give it a gas or keep the throttle open I guess???. While throttle-body cleaning is good preventative car maintenance, it should also help engine drivability. The other thing is that the idle is high (2000) rpms and I have the idle screw backed all the way out. It starts up fine but dies with a bit of throttle. Although the main things have been checked, filter, carb, etc but all seem fine and still no luck in getting her to stay going. A misfire will cause the engine to momentarily stumble, or lose rpms, and then regain its normal engine speed. Idle fee rates double when the station is 100% occupied. see our lemon odds and nada odds page to see vehicles with no repairs or vehicles with more than three repairs. Once it steadies out, it idles perfect. I have a 1988 260e mbz. so I get the. the idle screw is set all the way closed and i got a new throttle return spring. half a year ago i noticed the idle problem just like u descibed, when i start the car engine has like 1400-1500 rpms and when it cools down it drops to 600, but agter i drive the car for a few mins the idle drops to 400, it doesnt matter if the tranny is in P or D but after revving the engine it goes away, but not always. Chevy 2003 Trail Blazer ls question = When i turn on my a/c and let it idle the rpm dips way below 1 and almost shuts off until i rev it up again but if i let it sit there it shuts off, it does the same thing when i turn on the heat, other. [Symptoms:] Cold Start: Car starts immediately with no throttle application, idles smoothly for about one second, then hesitates and dies. has high idle ,1,500 rpm. The only time it stall when I shift it into neutral, but when its hot its OK. The car is a 1985 535i and was apparently the daily driver of the kid I got it from for several years before it sat for the last 6 months. to see how frequently 2010. when that happens, the air can't get around the closed throttle plates to support the engine idle so the car stalls. Rough Idle When Starting Cold, Then Goes Away When Engine Is At Operating Temperature More Details Below I have an older, low mileage vehicle with a V8 engine. pedal down, and it opens the butterfly in the carb does it die out? or just idles? sounds to me if it dies out, its a carb problem. checked it and got the same. But car won’t stay in idle by itself…. CarComplaints. The AIC adjusts the engine RPMs by opening and closing a bypass inside the throttle body. I have a 02 Ford focus 2. I am new to this page and I need some help. Always goes lower in rpms then corrects itself back to 500. Hi guys, my work car (1997 Oldsmobile Achieva SL with the 2. Car has a very rough idle at stop. there arent anycodes other then 52. The engine might be choked properly, but when the fast idle cam kicks down when the motor is cold, it might not be causing the engine to idle at the right speed, or causing a change in the idle speed at all. The idle air control valve — also known as the "idle speed control valve" — regulates the idle speed of your engine. the first thing to do is to have the throttle body cleaned. Oct 01, 2008 · "You can expect to pick up one- to three-tenths in the quarter with a custom carb in a typical street/'strip car, but an even bigger benefit is the improved idle quality, throttle response.