Question about 1995 Pontiac Bonneville

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Rough idle it has a really bad idle almost like a hot rod an it always does it an when i floor it down it takes of but feels like it is choking like having trouble passing gas or something but it does take off?

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Posted on Jan 02, 2017

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MNfisherman
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SOURCE: 1999 pontiac grand am 4 cylinder rough idle, rpms fluxuates

Most likely your throttle position sensor is faulty. You could have a vacuum leak as well. Most probable cause is a bad sensor. Is your check engine light on? Have you checked your engine codes? You can go to autozone.com and register for full free online repair manual.

Posted on Sep 14, 2009

Testimonial: "the check engine light had been on but we unplugged the battery yesterday for a couple of hours and put it back in and the light isn't on anymore. "

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1 Answer

99 dodge intrepid stalls and rough idle. When I floor it the car will fall on its face. Hesitation after I come to a stop. Shakes and idles very rough, battery is also dying often. Replaced the cam and...


Check fuel pressure. Air filter could be really clogged, usually they will collapse first. Then check for exhaust pressure out of the tail pipe. Little pressure or it's really hot. The catalytic converter/s are plugged up.

Mar 18, 2015 | Dodge Cars & Trucks

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Bad idle


chk/test yr plugs also. If it starts to break down then chk soliniod & coil as u may be getting the start of a bigger problem. yr symptoms r showing signs of an elecrical problem. rough warm ups r the signs. c/be choke sensor also causing roughness..

Sep 04, 2012 | Cars & Trucks

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1992 Ford Ranger 4.0 starts, runs and idles fine sometimes. then the next time I start it, it idles rough


your choke Is stuck on the Injector/carborater. when you press the gas It Is lettIng to much aIr In. check the cable on Injectors or If It Is carb get some carb cleaner from your local automotIve retaIler and take the breather off and spray carb. also check around It to kake sure the cable Is.not streatched nor caught.

Feb 23, 2012 | 1992 Ford Ranger

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1998 GMC Savana 3500 5.7L. Truck starts ok when cold. After running, very difficult to start have to pump the pedal and hold to the floor. Fuel pressure jumps to 62psi when pump runs, drops to 58 and holds...


HOW MANY MILES ALOT IT REALLY SOUNDS LIKE YOUR O2 SENSOR OK LOCATED ON THE EXAUST PIPE CLOSE TO ENGINE UNDER THE HOOD THEY CONTROL YOUR FUEL MIXTUER FOR HOT AND COLD LIKE A CHOKE . IF ITS BAD THE ITS FLOODING IT OUT WHEN HOT AND YOU GET ROTTEN GAS MILAGE BECAUSE YOUR FUEL PRESSURES ARE FINE REGULATORS EITHER WORK OR THEY DON'T AND IT THEY DON'T YOUR TRUCK WON'T RUN O2 SENSORS GOING BAD DON'T ALWAYS GIVE A CODE OR A DASH LIGHT BECAUSE OF THE BAD GAS MILAGE AND BLACK SMOKE WHEN IT IS WARM ITS PRETTY OBVIOUS WHAT IT IS OK GOOD LUCK POHLCAT

May 03, 2011 | 1998 GMC Savana

1 Answer

The idle jumps when engine is cold from 1000 to 2500 rpms and starts really rough requires pushin gas petal to start


Being efi (electronic fuel injection) the idle should be higher when starting off cold...in the older days, you used to use a choke, a handheld lever that you pulled out to shut off the air to result in a rich mixture...due to cold air there is alot of oxygen molecules, so a choke increases the fuewl mixture to compensate aiming for that 14.7:1 air to fuel mixture ratio


BUT it should not be that high, what is happening is that is dumping too much fuel in and you are having to go WOT (wide open throttle) to prevent a "flooded" condition..

Why ???? Well, it could be a faulty air flow sensor, a faulty or out of adjustment idle control, bad fuel, bad air filter, fuel filter, fuel injectors bad....etc etc

So, more info is required to solve it......when was the car last serviced, and does it only occur when cold, or do you notice that it is hard to start when hot as well.

Sep 27, 2010 | 1992 Honda Prelude

1 Answer

2001 mercedes c240 has a really rough start but when the car almost dies I turn the car off wait 3 seconds and it starts perfect. Next comes the issue with having to warm it up before driving anywhere...


Gasoline- thank you. Warm up is not an issue like diesel is. Sounds like the choke is is either wide open or over choking. With the engine cold, remove the air cleaner and note where the plate is at the opening of the carb. If it is wide open then without touching anything else and engine not running, step down on the gas pedal and see if the choke plate reset itself to restricter the carb inlet. If it didn't, then take some WD 40 and spray the linkages and the rod ends holdin the choke plate.By hand work the plate and linkage holding the gas open at the carb. Then set the plate to wide open and do the gas pedal thing agan to see if choke sets itself back to restricting the carb intake. If it does, start the engine and as the engine warms upm the choke plate should start opening on its own and you are off and running. Roitine question. Is your air cleaner clean? If the choke plate needs adjusting. get back to me. K? Good luck Remember to press the gas pedal down once before cranking. That sets the choke for cold start. Hope this helped you Good luck Note, the WD40 won't hurt anything but avoid spraying with engine running or when engine is hot..

May 12, 2009 | 2001 Mercedes-Benz C-Class

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Truck losing power and service engine soon light on


Like to other guy said, give it a tuneup. Also try SEAFOAM to clean carb up of slug. Also check to make sure the butter fly for the choke has not come loose, causing it the choke it down. Failed choke pull-off.

Dec 10, 2008 | 1995 GMC Sonoma

1 Answer

Rough idling and choke


the only thing that can cause this is maybe you have a bad planium gasket but before changing this you could also have gotten some bad gas cause most gas have 12% water or more so try STP gas treatment first

Nov 28, 2008 | 1996 Ford Escort 4 Door

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