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Unread 02-09-2012, 11:05 PM   #1
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Default 2004 Grand Am SE Stalling

Hi, I'm new to this forum

I have a 2004 Pontiac Grand Am SE (the 2.2L Ecotec 4 cylinder). It runs fine, except it has been stalling lately. Going back about 4 months when I got my oil changed, I found a dent in my transmission pan causing it to slowly leak transmission fluid. I took it to a transmission shop and had the transmission pan and fluid replaced.

Then starting about 3 weeks ago, the stalling started. It generally stalls at lower speeds (around 20 - 30mph) and with slight acceleration. It did this about once a day for 3 days. First I put in some dry gas to see if that would help but it did nothing. The spark plugs and fuel filter were replaced as well as the fuel system cleaned. After this it ran fine for about 2 weeks. But just today it stalled on me again. I'm not the best with cars and don't really know what to look for next. Any help would be appreciated, and if you need more information or have questions I will do my best to answer them. Thanks.

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Unread 02-09-2012, 11:33 PM   #2
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the Eco tech is tough to diag due to the coil on plug and module built together. also ita a waste spark system which can make things even tougher. i wouod suggest having it check by a reputable shop. if I was to guess fuel pump, crank sensor, or ign module. very hard on that car to barrow down. lets try a little more info. ever run rough? does it always start back up? or do you have to wait a while?
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Unread 02-10-2012, 12:04 AM   #3
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Originally Posted by lautinjr View Post
the Eco tech is tough to diag due to the coil on plug and module built together. also ita a waste spark system which can make things even tougher. i wouod suggest having it check by a reputable shop. if I was to guess fuel pump, crank sensor, or ign module. very hard on that car to barrow down. lets try a little more info. ever run rough? does it always start back up? or do you have to wait a while?
Thanks for the suggestion. After it does stall and I turn off the car, it starts right back up no problem. It never has a problem starting and I don't have to wait. The only thing I can say is it does seem to idle a little bit rough (very slight shaking), but when driving it never misfires or has problems accelerating.

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Unread 02-10-2012, 12:56 AM   #4
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It would have to be electrical. Crank sensor is the obvious pick, but a ignition control module could be the cause also. Crank sensor is probably pretty cheap so worth a shot. You might want to pull the module and coils off for a good inspection. Look for ripped boots are signs of arching that might point to another problem before purchasing the crank sensor.
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Unread 02-10-2012, 09:01 AM   #5
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Wouldn't run for beans at any speed with a bad crank sensor...unless something's different about those. Most cars won't that i've seen. Cam sensor would be more likely I think.
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Unread 02-10-2012, 09:51 AM   #6
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I've had a car stall too, usually at idle though. I just cleaned the Idle Air Control Valve and that fixed the problem.

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Unread 02-10-2012, 09:21 PM   #7
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I would suspect idle air if it didn't do it accelerating. If I remember right that motor doesn't use a cam sensor. It generates it's own signal based off waste spark, but even if it did a cam sensor won't cause it to die on a Chevy just fall into closed loop on fuel injectors. Just one more way Chevy keeps it simple and dependable. Crank may fail at certain rpm's sometimes. Usually if you redline the motor quickly in park and it doesn't die then likely not a crank sensor, but not a defined way to tell.
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Unread 02-12-2012, 06:10 PM   #8
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I tried revving the car and in park or neutral it just made it to about 3500 RPM and wouldn't go higher. I'm guessing that's the rev limiter kicking in? Someone told me they think it's the coolant temperature sensor, does that sound probable?

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Unread 02-12-2012, 09:21 PM   #9
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It could be. They can cause her to run rich but usually your problem will be temp related like dies when hot only, may not restart to cool.
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