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Misfire issues

Sandman

Sandman

New member
I started developing a misfire all of a sudden last weekend. It would misfire at about say 10lbs of vacuum. I changed the coils and now its only in boost. I've also changed the ICM, swapped the wires, and regapped the plugs to. 058 in case it was spark blowout. The only other thing I can think of is changing the plugs out, these are not even 2 weeks ago. I think I have a bad flex but I wouldn't think that would give me the problems I'm having. No codes and the car runs fine otherwise. Any bright ideas?
 


Yup

I also noticed tonight coming back from the bar, it doesn't start to miss until the motor actually warms up, that's when it starts.

Where are the engine grounds for these cars located?
 
I'm waiting on a tuner to get here, I'm hoping today. I don't think that I have any vacuum leaks, I shouldn't be running out of fuel, I have no idea since my flex I effed up and throwing the WB off.
 


Tested the FP as well and it primed to 42psi and stayed at 42psi running. Pump or regulator?
 
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This may sound dumb, but humour me:

Put the shifter into the one or two position then slowly accelerate until you're around 4000 RPM then try giving it gas.

See if it smooths out up there.
 


The above is what I found when my balancer went bad.

When you replaced the wires/plugs did you do that at the same time?
 
Checked fuses, which I should've done first, they're fine. Swapped MAP sensors and that wasn't the issue.
 
I don't know these things lol. I've tried searching other threads but it helps when people actually report what fixed their car
 


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