fuel pump question

[blackdeathtrap]

i have and 87 gn .
adjustable fuel pressure regulator set a 42 line off
walbro 355 with hot wire
tt street chip car currently has multiple issues im trying to sort this one before i pull the engine to fix other problemes
last year when i had key on engine off pump would cycle then stop which is normal now pump just keeps going none stop (i think its leaky injectors that are the cause)
also the car will not hold fuel pressure very long ( i think adjustable fp diaframe is week ) am i on the right track or could something else be my cause
i have 0 external fuel leaks

 

[buddy]

I'm no pro but I would try replacing the fuel pump relay for the pump staying running. As for the fuel pressure issue, pull off vacuum line to fpr, if it smells like gas, fpr diaphragm is leaking.

 

[blackdeathtrap]

Il give that a go se if that fixes it
If i deem it bieng bad injectors would you go with 60s and a chip my engines quite built and im pretty close to maxed out on current 38 pounders

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[earlbrown]

last year when i had key on engine off pump would cycle then stop which is normal now pump just keeps going none stop (i think its leaky injectors that are the cause)
also the car will not hold fuel pressure very long ( i think adjustable fp diaframe is week ) am i on the right track or could something else be my cause
i have 0 external fuel leaks

Nope. The ECM fires the pump and turns it off during KOEO. I has no pressure data feedback to decide to turn off the flow.


On your pressure leakdown, it could be many things... and honestly most of the 'problems' don't really matter when the car is running.


What style hotwire kit do you have and is it triggered by the FP test lead behind the alternator?

 

[TTA308]

A short in the oil pressure circuit will cause the pump to run on.

 

[Chuck Leeper]

A short in the oil pressure circuit will cause the pump to run on.

Yep. As in the rubber cover on the plug is rotted off, wires are loose.

 

[blackdeathtrap]

Can it be purchase or should i just make connectors

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