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full throttle afpr problem

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92GSXBaltimore

20+ Year Contributor
331
5
Feb 19, 2003
Baltimore, Maryland
ok so i installed the afpr today. Also I installed a guage(b&m) on the fuel filter. so i hooked it all up, started the car(vac disconnected/caped off), the idle jumped to like 3k rpms, and the fuel pressure guage was at 100psi!!! WTF!!!. so i tried to adjust the pressure and nothing happened. I backed the screw all the way out and screwed it all the way in and no change. what the hell is going on. so i disconnected the rail and depressurized it and the freaking guage dropped down to 25psi with no pressure in it..........WTF. Im assuming the fact that i maxed out the guage it f-ed up the calibration. im going to put my stock fpr back in and see what happens.
p.s. i have a walboro 255 and stock injectors
 
92GSXBaltimore said:
ok so i installed the afpr today. Also I installed a guage(b&m) on the fuel filter. so i hooked it all up, started the car(vac disconnected/caped off), the idle jumped to like 3k rpms, and the fuel pressure guage was at 100psi!!! WTF!!!. so i tried to adjust the pressure and nothing happened. I backed the screw all the way out and screwed it all the way in and no change. what the hell is going on. so i disconnected the rail and depressurized it and the freaking guage dropped down to 25psi with no pressure in it..........WTF. Im assuming the fact that i maxed out the guage it f-ed up the calibration. im going to put my stock fpr back in and see what happens.
p.s. i have a walboro 255 and stock injectors

Sounds like something is jammed in the AFPR. call fullthrottle and talk to mike. You could "possibly" take it part to see what is not correct(diaphram not moving, stuck in a high psiposition) however with priority mail once it is dried out you can get it back in 2 days for full throttle to correct their problem. I use the same and like it very much though it was a wait for me also but worth it. Mark
 
I don't see 100PSI being a problem for a Walbro. I had a bosch 350 that did 115 psi. mark
RRE does have some specs on the pump I believe. I'll look!
 
i fixed it tonight, the damn feed line was kinked, when i put the gauge on the fuel filter i twisted it and didn't realize because the kink was under the CAS and it didn't really twist until i spun the rail around to seat the injectors.

stupid mistake!
 
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