TwinTurbo.NET: Nissan 300ZX forum - HELP please? 90 300zx TT issues.
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Subject HELP please? 90 300zx TT issues.
     
Posted by iamdan012 on July 05, 2013 at 1:34 PM
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Message So I've searched till it hurts to read. Troubleshooting till I'm ready to pass out and I need some help.

My car is seeming to have some misfiring issues. When it first starts it seems like it's running on all 6. As soon as I touch the gas it acts as though it immediately loses a cylinder. When you drive it an it gets to normal operating temp it seems to lose another. There is no more acceleration, no more pull, as recent as three days ago it was surging or hesitating.

I relocated the ptu as I felt it was becoming too hot and possibly the connections would start to lessen. It stopped the surging when I took it out after I did this but the sluggishness continues.
It has new ngk spark plugs
5 new coils.
New fuel filter
New oem injectors.

Additional information:
I hard wired the detonation connector.
It has Stillen side mounts.
A k&n filter with stillen housing.
Compression ranges from 150-137 on the lowest cylinder.
Oil pressure fluxuates badly. At first crank reads 90+ but can settle at 30 but drop all the way to 0 in no time at all.
I have a vaccum leak and a coolant leak but I've put those on the back burner as I try to find the main issue. I realize a vaccum leak can cause this but I don't think it's causing this.
I have yet to inspect the timing belt but plan to today.

Please help, I'm really getting desperate..

     
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