2000 cavalier mid range stumble - Page 2 - Fuelly Forums

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Old 10-18-2009, 02:38 PM   #11
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Quote:
Originally Posted by theholycow View Post
There is a way to test coil packs. I think you measure their resistance.

Ah, found it:
It's not the coil packs...

Coil for 1&4 measured 5,800 ohms on the secondary and 0.7 ohms primary...

2&3 measured 5,900 ohms secondary and 0.7 ohms primary.

I was hoping that is what is was... Apparently not.

Any ideas?
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Old 10-18-2009, 08:52 PM   #12
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clean all the connections maybe?

change out the plugs and wires (though I think you already did recently)

dang-it, the mystery continues
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Old 10-19-2009, 11:25 AM   #13
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I got a CEL earlier. P0420

After doing some research, I think the code is being thrown because of an exhaust leak.

I can rev the engine and when it is going back to idle, I can hear the "pop, pop,pop" of it sucking air. I have a feeling it is at the flex pipe. I'm letting the car cool off before I crawl under it to look.

Correct me if I am wrong, but this would cause the symptoms I am having.
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Old 10-19-2009, 11:52 AM   #14
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exhaust may be a good place to start. here is some info from the obd web site.


http://www.obd-codes.com/p0420
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Old 10-19-2009, 01:57 PM   #15
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Originally Posted by BEEF View Post
exhaust may be a good place to start. here is some info from the obd web site.


http://www.obd-codes.com/p0420
I assume you mean the exhaust manifold?

I found the leak. It was at the flex pipe like I thought it was. Next payday, I'm gonna have a new one welded in. Hopfully that fixes it. If not, I will go from there.

Thanks for your help everyone.
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