Question about 1998 Pontiac Bonneville

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Engine misfiring when i start my car sometimes and start to drive it go. it sounds like the engine is misfiring. what makes it do that?

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You are aware that it could be many things? No one can diagnose these issues without lots of questions,info and a vehicle to test.

Posted on Sep 26, 2009

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MrBirdMan64
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SOURCE: engine misfire

White smoke usually indicated it's burning antifreeze. Check your antifreeze level and oil condition before anything.

Posted on Mar 29, 2010

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1999 GMC suburban hesitates start, when first starts then will **** and misfire after about a few blocks of driving......takes a bit for it to stop misfire /jerking and then it runs fine. Sometimes, not...


It might be your coolant temp. sensor-not the sender for your dash gauge, but the sensor that tells the computer the engine temp. I'd also replace the spark plugs. If they have a sooty, black coating your engine is running rich. Does the engine light still come on? If same code, you need to check that circuit out more fully.

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Intermittent misfiring


Had the same thing. The didtributor was going bad. Lived with it for a few months finally it died. 1 year after replacing the distributor the problem started again. Glad I got a warranty on the distributor. Running great now on the second distributor.

Jul 08, 2010 | 2001 Mitsubishi Diamante

1 Answer

Engine just cutting out even while driving


Sounds like misfire.
On this cars common problem is - intake manifold gasket goes bad creating big vacuum leak , what makes fuel mixture very lean and causing misfire and even stalling engine.
Usually gasket goes bad toward rear of the engine.
How to check :
Buy carburator cleaner spray .
Turn engine on and spray cleaner in to intake manifold gasket area , from begining to the end of it.
If engine start choking or picks up the idle speed - it is your problem. Choking indicates big vacuum leak ,
idle increase indicates small vacuum leak.

Jun 03, 2010 | 2003 Nissan Altima

1 Answer

Engine misfire


White smoke usually indicated it's burning antifreeze. Check your antifreeze level and oil condition before anything.

Mar 29, 2010 | 2002 Dodge Ram Maxi

1 Answer

I have 2003 dodge caravan when i start the van


SOUND LIKE SEVERE ENGINE MISFIRE HAVE VAN SCANNED AUTO ZONE WILL DO IT FOR FREE .BUT MAKE SURE FUEL FILTER NOT STOPPED UP MAKE SURE PLUGS AND WIRES IN GOOD SHAPE.FILL FUEL TANK UP.PUT A BOTTLE FUEL INJECTOR CLEAN IN FUEL TANK.TO CLEAN OUT FUEL INJECTORS WHILE YOU DRIVING THE VECHICLE.ALSO BAD COIL OR COILS WILL CAUSE ENGINE TO MISFIRE SHAKE.

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1 Answer

1998 ram 1500 5.9 gas rough idle,hissing sound from air filter,missfires after each start for 2-3 minutes every time.if driving need tap gas pedal to make it run,on idle sometimes stalls,no dtc codes at...


SHOWING MISFIRES ON SCAN TOOL?IF NOT,ENGINE CONTROLLER HAS NOT LEARNED MISFIRE MONITOR..WILL HAVE TO BE DRIVEN A BIT FOR RELEARN..IF YOU CAN SEE MISFIRES..MISFIRING ON MORE THAN 1 OR ALL CYLINDERS?CHECK UNDERSIDE OF IGNITION COIL FOR CRACKS..IF NOT CRACKED,YOU MAY HAVE A FAULTY CRANK SENSOR..ANY CORRODED PLUG WIRES AT DISTRIBUTOR CAP?ALSO CHECK IF ANY OIL PRESENT IN INTAKE MANIFOLD..GASKET ON BOTTOM OF INTAKE MAY BE BROKEN CAUSING AN INTERNAL VACUUM LEAK

Jun 15, 2009 | 1998 Dodge Ram 1500 4WD

1 Answer

Engine misfires badly after cruising a while at 3k revs,


Try to check the computer box and check if it is working and check the timing belt as well make sure it is properly tune up.

Jun 09, 2009 | 1998 Subaru Legacy

2 Answers

I have a 1996 oldsmobile cutlass supreme sl 3.4l and sometimes my car will shake a little and the check engine light will come on and sometimes i will be driveing and when i hit the gas and take off fast...


the flashing check engine light is indicating a misfire. if you can't get it scanned for codes, start with the obvious, check plugs, wires, and coil packs first.

Feb 21, 2009 | 1996 Oldsmobile Cutlass Supreme Coupe

1 Answer

Car starts to buck and then shuts off. We were told it was the main computer, had it replaced, to no avail.Took it back and were told there was water in the gas tank, they drained it.... Continued with the...


Is this a V6 VQ35 or 4 cylinder QR25?? If the check engine light is flashing the car is not running on all cylinders. Misfire detected by the ECM/computer. The code for the check engine light is going to be misfire code, that will tell you which cylinder misfired. Need more info as to which powertarin you have (V6 or 4 cylinder) They both have their own bugs. Let me know. Oh. and how many miles on it also.

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