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The Terminator
Engine/Tuning
Fuel Pressure Question
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<blockquote data-quote="silver03svt" data-source="post: 15362219" data-attributes="member: 107540"><p>FINALLY, I think I have gotten all of the wiring issues with my Boost-A-Pump worked out. Bought a new relay, and wired the BAP to be PRE-FPDM instead of POST-FPDM. Car sat for OVER 48 hours without the battery draining. </p><p></p><p>NOW, when I am driving and I let off of the gas pedal, I am seeing the fuel pressure go up to around 75psi. If I just rest my foot back on the gas pedal, the pressure drops to about 29psi for a fraction of a second and then levels at 40 psi. If I put the car in neutral to coast, it also drops back to the normal 40 psi. Again, it only spikes when I lift off the go pedal to decelerate.</p><p></p><p>Any ideas on what is causing the fuel pressure to jump so high while the car is decelerating?</p></blockquote><p></p>
[QUOTE="silver03svt, post: 15362219, member: 107540"] FINALLY, I think I have gotten all of the wiring issues with my Boost-A-Pump worked out. Bought a new relay, and wired the BAP to be PRE-FPDM instead of POST-FPDM. Car sat for OVER 48 hours without the battery draining. NOW, when I am driving and I let off of the gas pedal, I am seeing the fuel pressure go up to around 75psi. If I just rest my foot back on the gas pedal, the pressure drops to about 29psi for a fraction of a second and then levels at 40 psi. If I put the car in neutral to coast, it also drops back to the normal 40 psi. Again, it only spikes when I lift off the go pedal to decelerate. Any ideas on what is causing the fuel pressure to jump so high while the car is decelerating? [/QUOTE]
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