Evil EG

Man if its not one thing it another! Anyway like I said before in an earlier post I broke the diaphram on my AEM FPR so gas got into the Vac/Mani lines and now it runs like ****! So I put my stock FPR back on and it helped for alittle while.
Symptoms:
-Whenever I hit a big bump in the road the A/F goes lean and the car falls on its face (at ANY RPM) like the A/F goes all the way red and even when you give it gas it sounds like your just pushing air and no fuel into the cylinders.
-Car sometimes will just die while at idle
-Car is fine when drag racing

I think maybe it has somthing to do with the inline pump or FMU. Or even an injector is bad...

right now im running 10psi, inline pump, 12:1 FMU, stcok FPR, stock injectors, NGK bkr7e-11's .

any help would be great, thanks

93LSivic

It would probably be a good idea to turn down the boost pressure. You are running a dangerous fuel pressure under 10 psi boost.
If you hit a bump in the road and **** goes wack, then you most likely have a loose connection somewhere. Check maybe your injector harness and plugs, your power connections at your inline pump, and all of your vacuum lines.

Mr. Softee

10psi is too much, turn it down to 8 until you get a better fuel setup. I know this from experience.

Evil EG

Ok well today I pulled of my fmu. Before I did that my fuel press gauge read 35 when the car was off. I took the FMU off thinking that it would squirt fuel out all over since the rail said it had pressure, well I took off the return line to the tank first...no fuel shot out not even a drop. Next I took off the line between the FMU and the Stock FPR once again NO fuel shot out...but the gauge still reads 35 psi. Does the stock FPR hold the press in the rail?

Well Im gunna go take the FPR off now, I think I have debris in my rail...

Mr. Softee

yes hte stock fpr holds pressure in the rail.