2000 olds intrigue

[kellyb1]

Car recently started sputtering, had code pulled and it stated that cylinder 3 was misfiring. Since then I've changed plugs on cylinders 1, 3, and 5 and also did a swap of the coils and still happening. Did not have code pulled again but was wondering if it could be the coil or injector problem. Any thoughts wouldbe appreciated.

[dtownfb]

First thing to do is pull the code again to see if it is the same or different code.

Second thing is to try and isolate when the sputtering happens.

Third, post the exact code. There are very few problems that this group has not faced with this vehicle.

[LittleHoov]

Yes you need to pull the code again, it could be that your code has "moved" to a different cylinder because of the coil swap.

[krivasauto]

Loosing any coolant?

[tacosoldier]

My question is, have you run the car while it was overheating? If so, either the heads or the head gasket is cracked and causing coolant into the combustion chamber.
My mother in law had this similar situation and after the replacing the head gasket the misfire troublecode hasn't reappeared and her engine runs smooth again.

[krivasauto]

Originally Posted by tacosoldier

My question is, have you run the car while it was overheating? If so, either the heads or the head gasket is cracked and causing coolant into the combustion chamber.

Well, don't jump to any conclusions. Head gaskets can fail without the vehicle overheating, and you can have an engine run hot without blowing the head gaskets. Block testing is the best way to figure it out, unless, like on mine, you pull the plug and see coolant in the combustion chamber.

[LittleHoov]

If you were burning coolant the plug you pulled out of cylinder #3 should look quite a bit different than the others you changed.

I still maintain you should get the code checked again as you might have a different cylinder thats misfiring now.

If you can confirm youre getting good spark, I think a compression test might be the next easiest thing, though Im sure some sort of adapter or tool might be required due to the long,narrow spark plug channels on the 3.5

The only other thing after that would be to confirm that the injector is working properly, and the only way to really do that is pull the fuel rail out. You can however check to see that the electrical pulse is making it to the fuel injector with a simple test light. You might just have a broken wire somewhere.

I would still think a compression test is easier that pulling the fuel rail, but that sounds like the sort of thing krivasauto could tell you....

Some people put together puzzles or build models for fun....Krivasauto takes apart Intrigues.

[krivasauto]

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