Question about 2002 Pontiac Grand Am

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2002 pontiac grand am wants to stall when driven for about 1hr straight....I changed the coil pack, the crankshaft sensor but it still runs the same and I can smell gas all the time when standing outside of the car....I also changed the fuel pump....

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Might be transmission happen to me once

Posted on May 22, 2009


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Can catalytic converter on 98 Pontiac grand prix cause misfire on cylinders in car

No, a plugged converter would cause the engine not to breathe properly. Too much back pressure would stall the engine or make it run very poorly. It would not be local to any one cylinder-all of them would be affected.

To diagnose a misfire in one cylinder, well, you start at that cylinder. It could be ignition related- the spark plug and spark plug wire for #6, possibly the ignition coil for #6 in the coil pack for the engine. (A v-6 would have 3 coils in the coil pack, one coil for 2 cylinders.) It could also be fuel related, so the fuel injector for cylinder 6 should be considered. And the last reason for a misfire is usually the most expensive repair: low compression in #6. This may be a head gasket problem, or a piston ring problem, or one of the valves for #6 may not be sealing well, causing low compression and the resultant misfire. The engine computer codes a misfire when it senses low power output from that particular cylinder. The misfire causes a lag in crankshaft rotation, and the crankshaft position sensor senses it.

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Grand cherokee will not stay running

cheak the crankshaft position sensor, if that is faulty the car will stall and after a while possibly wont start back up till it cools a bit.I know i just delt with my wifes car would stall at first at a red light or on exit ramp. then it would just stsall driving on the highway.changed the cps and now now problem with that i got another problem now.hope this helps.

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When driving it just quits running have to restart

Without any proper diagnostics, a good guess would be the Crankshaft position sensor. The sensor is a magnetic pickup sensor with coil windings inside, and with age, the coil windings are breaking down. The heat is causing the circuit to open momentarily causing your car to stall, but allowing it to start back up again. This problem WILL get worse and eventually leave you stranded if you don't have it fixed soon.

Aug 15, 2012 | 2002 Pontiac Grand Prix

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3800 runs good then gets warm and will stall then it will start and stall start and stalll then after a few mins it will start and run fine for a fwe mins

possible crankshaft position sensor ...these motors were notorious for going bad you may have one on the way out.ITS behind the balancer,it would have to be removed.

Aug 03, 2011 | 2002 Pontiac Grand Prix

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