Fuel Pressure Help
05-10-2009, 11:55 PM
#1
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Fuel Pressure Help Ok, so yesterday i was at cordova dragway in illinois, i ran my stock 95 Z28 A4, i netted a 16.1 the first run, and a 20.54 the next.....
the car pulls amazing up to 4500 rpm where it hits a brick wall, sputters, and loses all power. i changed the fuel filter today hoping it was clogged, which did help a little. but did not cure the problem.
I then decided to hook it up to a fuel pressure gauge, and at idle it was reading 21psi, and would drop with throttle. it will throw a code 55, which is fuel system running lean.
time for a fuel pump eh?
anybody know where i can get a good deal on a factory pump?
the car pulls amazing up to 4500 rpm where it hits a brick wall, sputters, and loses all power. i changed the fuel filter today hoping it was clogged, which did help a little. but did not cure the problem.
I then decided to hook it up to a fuel pressure gauge, and at idle it was reading 21psi, and would drop with throttle. it will throw a code 55, which is fuel system running lean.
time for a fuel pump eh?
anybody know where i can get a good deal on a factory pump?
05-11-2009, 09:40 AM
#3
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i was thinking about that or a walbro 255.
does anyone know if a 3rd gen TPI pump will supply enough fuel for an LT1 car? i am able to get one under warranty, and its a high pressure pump for a fuel injected V8 car so would it work?
does anyone know if a 3rd gen TPI pump will supply enough fuel for an LT1 car? i am able to get one under warranty, and its a high pressure pump for a fuel injected V8 car so would it work?
05-11-2009, 12:46 PM
#5
The TPI pump will supply fuel plenty fine, i am worried about fitment. Heck, the V6 fuel injected pump in my car fed my L98 for a long time with no worries. The pumps themselves are rated much higher than the 40psi needed.
05-11-2009, 04:06 PM
#7
Be sure and get a wiring harness also; the stock wiring is marginal for the stock pump, much less one with the higher power demands of the 255 Walbro. The Racetronix kit is a nice unit, and the wiring harness is second to none.
I got mine from Lonnie's Performance, and he provided excellent after-sales support.
I got mine from Lonnie's Performance, and he provided excellent after-sales support.
