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Author Topic: Misfire, Misfire, Misfire....need help!!!
1FASTSS
1st Gear
Member # 684

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Well, started getting P0300 misfire code a while back and it looked like the 02's were not heating up correctly and replaced them. Still had the misfire code come up.
Then checked plug wires, etc, and everything checked out ok. So I was thinking fuel injectors, replaced them and still have the misfire.

Then after that I took my car and had it scanned with a Snap On scanner and every cylinder is missing. Well, thought it was Opti for sure.Replaced Opti/Waterpump and guess what, still have the misfire.

What else could it be? would the intake leak be a problem. There is no signs of the leak but with 60K it could be there? Would the leak cause a misfire this bad?

Any help here??

Thanks
Chris

Posts: 61 | From: Chicago,IL | Registered: Aug 2000  |  IP: Logged
Hawkeye
5th Gear
Member # 88

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Sorry, no help here. You've checked the obvious.

This will TTT the message. But the only thing is, it may be time to head to the dealer. Maybe GM's scope will tell you.

Posts: 5558 | From: Windsor, Ontario. Canada | Registered: Feb 2000  |  IP: Logged
2002Z4CSS
"Post"er Child
Member # 1393

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Cracked spark plug?
Posts: 5682 | From: Dearborn,Mi. | Registered: Feb 2002  |  IP: Logged
1FASTSS
1st Gear
Member # 684

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I checked all plugs and plug wires and everything is fine. I will go ahead and replace the coil and see if that does it.
Posts: 61 | From: Chicago,IL | Registered: Aug 2000  |  IP: Logged
   

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