What could cause this power problem?

[Synned]

Sometimes when my car is running...it has absolutely NO power. I floor it and it feels like its on 4 cylinders. I think it does pick up a little in the power band but still not good.
I always notice this happens in warmer weather...but it is NOT just because of the hotter air. Something definetally goes wrong.
I'm wondering what the first steps I should take in trying to diagnose this problem.
I do have a slight misfire at idle as well...but I don't think the two are related.
I have new o2's, new ect and new plugs, wires, cap and rotor.

Thanks guys
Joe

 

[Synned]

 

[urban96]

im fightingthat same battle, you getting the spitting/poping too?

 

[95Vert]

I'd say to check all your plugs and wires. Check your cap and rotor. It could be that simple. If that's not it, get a test done to your injectors. Clean your MAF and check your TPS along with the IAC. A friend of mine had the same problem and after changing all of that, the problem was the fuel pump. After the car warmed up, the fuel pump would lose pressure and make the car feel like a semi truck.

 

[Synned]

im fightingthat same battle, you getting the spitting/poping too?

Yes!

 

[Synned]

So does anyone know what FP should be at idle?

 

[HISSIN50]

So does anyone know what FP should be at idle?

Anything over 30 PSI with the FPR vac line attached is acceptable. WIth the vac line detached, look for 38-39 PSI.

Good luck.

 

[Skoobie]

Anything over 30 PSI with the FPR vac line attached is acceptable. WIth the vac line detached, look for 38-39 PSI.

Good luck.

What would be the symptoms if your FP was below 30PSI?

 

[HISSIN50]

What would be the symptoms if your FP was below 30PSI?

It depends upon what is causing the low pressure.

In general if one has low pressure across the board, I would expect pinging under load.

 

[urban96]

hmm.. i think mine is from running super rich with no tune yet. im running 25degrees total advanced (timing locked out) with no pinging. upper RPM's seem decent so im guessing its from the cam/injectors