mcfeat96talon
15+ Year Contributor
- 44
- 42
- Jul 26, 2005
-
Butler,
Pennsylvania
90 laser Rs turbo fwd.
Only mods are exhaust and 255 Walbro with fpr. AEM wideband and boost.
When the car starts up the pump is quiet and fuel pressure is steady at ~38psi. About 3-4 min after, pump gets loud and pressure drops to mid 20s and fluctuates from 22-30.
This causes the car to run extremely lean while driving. Basically forget accelerating, it drops to 3 dash’s on the wb.
Additionally, when the car is cold it runs pretty well besides high rpm under load. That didn’t last long though. As soon as the pump gets loud it leans out badly.
Ive changed the fuel pump, pickup screen, fire wall filter. I thought the return was clogged, it wasn’t. 12.95v at the pump while it is whining and pressure is fluctuating.
Only mods are exhaust and 255 Walbro with fpr. AEM wideband and boost.
When the car starts up the pump is quiet and fuel pressure is steady at ~38psi. About 3-4 min after, pump gets loud and pressure drops to mid 20s and fluctuates from 22-30.
This causes the car to run extremely lean while driving. Basically forget accelerating, it drops to 3 dash’s on the wb.
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Additionally, when the car is cold it runs pretty well besides high rpm under load. That didn’t last long though. As soon as the pump gets loud it leans out badly.
Ive changed the fuel pump, pickup screen, fire wall filter. I thought the return was clogged, it wasn’t. 12.95v at the pump while it is whining and pressure is fluctuating.
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