Mysterious Hesitation

[gtunn]

Good morning everyone!!

Okay, you good people have gotten me through the check engine light mess, (a bad Ignition Module), and the ABS Light Debaucle, (bad contacts at the wheel connectors), so now I need your help with the Mysterious Hesitation. This is a 1992 Grand AM with the 2.3 liter Quad Four engine.

Sometimes, when you accelerate from a stop, the engine just dies. It doesn't stall, it just acts like it has no power to move the car for about 5 seconds. No engine lights come on while this is happeneing. I have applied fuel injector cleaner, but the problem is still there. It doesn't act like a fuel filter probelm, as the car will pull a long hill under acceleration without any problem. Again, this is a very intermittent problem.

Hope you can help me.

Thanks,

GilT

[Ridenour]

Some possible culprits could be

bad TPS
bad / misfiring spark plugs
bad / misfiring coil packs
clogged catalytic converter
possibly something TCC related

If none of those items are the culprit, then my next step would be to have a shop do a full injector / fuel system flush for you - if you have very dirty / clogged injectors, the off-the-shelf cleaner may not have been enough to clean them. A professional cleaning (60 to 100ish $) might do the trick.

[majorstash69]

Originally Posted by gtunn

Good morning everyone!!

Okay, you good people have gotten me through the check engine light mess, (a bad Ignition Module), and the ABS Light Debaucle, (bad contacts at the wheel connectors), so now I need your help with the Mysterious Hesitation. This is a 1992 Grand AM with the 2.3 liter Quad Four engine.

Sometimes, when you accelerate from a stop, the engine just dies. It doesn't stall, it just acts like it has no power to move the car for about 5 seconds. No engine lights come on while this is happeneing. I have applied fuel injector cleaner, but the problem is still there. It doesn't act like a fuel filter probelm, as the car will pull a long hill under acceleration without any problem. Again, this is a very intermittent problem.

Hope you can help me.

Thanks,

GilT

i had a simalar prob but it was 3300 v6 & seeing i dont know much about cars & less about 2.3l i'll try to help i dont know if the 2.3l has a "mass air flow sensor" or not but if it does change it, that was the prob on mine & now when i push the gas its moves & with zero hesatation... ..