No rev past 4300.

**Mean Green** · 10-18-2010, 04:25 AM

Plugs where gapped to 35, vacuum reads 17/18 at idle, new coolant temp sensor, new wires, new plugs, new FPR, still a fresh engine. If I hit the throttle 100%, it will start to pop and backfire. If I slowly get into it, 50% throttle, it will rev to redline.

**blindmist** · 10-18-2010, 06:10 AM

Sounds like you have a 2-step. :P

**Mean Green** · 10-18-2010, 07:05 AM

Originally Posted by blindmist

Sounds like you have a 2-step. :P

That's exactly what it sounds like...literally.

**mb7050** · 10-18-2010, 07:31 AM

Still running that coil on plug setup ? I have a strong feeling its your ignition if your timing and fuel are spot on...

**Mean Green** · 10-18-2010, 08:02 AM

Originally Posted by mb7050

Still running that coil on plug setup ? I have a strong feeling its your ignition if your timing and fuel are spot on...

I took the COP system off. It's 100% stock now. I am going to go get some coils later today as I am thinking the same thing...

**FeaRpb** · 10-18-2010, 08:54 AM

I am having the same problem.

**DCIV** · 10-18-2010, 09:27 AM

I had the exact same issue when I bought my car. So glad thats gone. I replaced and upgraded SO many things along the way of figuring it out. Went maft, changed injectors, changed tuning devices, and ext. Basically it boils down to 3 things. Messed up fuel filter, messed up FPR, and either leaking turbos (or in hin sight pressurizing my crankcase).

Coop