Ive heard varying numbers on this 43? 55? 57? I need an exact number on what the stock fuel pressure is at idle, I need a starting point to use with my FPR



1989 Turbo Trans Am #82, 2007 Cobalt SS G85

hpt doesnt tell you???

uh no, theres no sensor for fuel pressure on an ecotec



1989 Turbo Trans Am #82, 2007 Cobalt SS G85

I believe 55 psi.

I heard 47, so I would like to find out as well what's the real number.


http://www.cardomain.com/ride/2208703

My full sweep electric autometer reads 57.5, thats 2003 stock fuel system.


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^^^^^^^^ and thats using the stock regulator right?

That seems really high for idle fuel pressure



1989 Turbo Trans Am #82, 2007 Cobalt SS G85

57 is what I've heard... of course with a stock FPR, I saw 62psi... and needed an AFPR to dial that back down to 59psi and saw my rich codes go away.

Now I'm running 73psi, need bigger injectors much

I had a mechanical gauge on my fuel feed line (on the 4AN fitting they put there cause they love us) using the stock fpr, it was my first mod , and it read 55PSI... i have a 05 Sunfire Ecotec



|Forged 8.9:1 Wiseco Pistons|Forged Eagle Rods|HPTuners|60trim|Tial Wastegate|
|Precision Intercooler|2.5" Exhaust|2.5" Charge Pipes|630CC Mototron Injectors|
|Stock: Fuel Pump, Transmission, Manifold, TB, Head, Head Gasket, Ignition, Suspension...|