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The Terminator
How-To
Return style wiring HOW TO allowing OE type fuel pump actuation
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<blockquote data-quote="gouldbri" data-source="post: 13159941" data-attributes="member: 98833"><p>So I checked my fuel pressure with the modified wiring that uses the fpdm to trigger the relays and the base fuel pressure was about 4psi lower than it was with triggering it with the 12V "key on" way. Also I got a P1237 - "Fuel Pump Secondary Circuit Malfunction". Basically an open circuit for the fpdm. I added a switch to ground the relays so that I can run the pumps all the time so that I can prime the system after the car sits for a while. I went to the track and ran the fuel system to the switched ground and lost 5 mph in the back half. Not saying that the wiring modification was the reason I lost the 5 mph but it is the only thing I changed since I last went to the track. SO a couple take aways that I learned. 1) using the fpdm to trigger the relays threw a P1237 code for me 2) for some reason I lost 5 mph in the back half 3) if you dont add a switch to ground for the relays you will be trying to prime the fuel system for a while with only running the pumps for a second or so. I am not saying this wont work but I think someone needs to talk to a tuner before making this modification. My two cents. thanks</p></blockquote><p></p>
[QUOTE="gouldbri, post: 13159941, member: 98833"] So I checked my fuel pressure with the modified wiring that uses the fpdm to trigger the relays and the base fuel pressure was about 4psi lower than it was with triggering it with the 12V "key on" way. Also I got a P1237 - "Fuel Pump Secondary Circuit Malfunction". Basically an open circuit for the fpdm. I added a switch to ground the relays so that I can run the pumps all the time so that I can prime the system after the car sits for a while. I went to the track and ran the fuel system to the switched ground and lost 5 mph in the back half. Not saying that the wiring modification was the reason I lost the 5 mph but it is the only thing I changed since I last went to the track. SO a couple take aways that I learned. 1) using the fpdm to trigger the relays threw a P1237 code for me 2) for some reason I lost 5 mph in the back half 3) if you dont add a switch to ground for the relays you will be trying to prime the fuel system for a while with only running the pumps for a second or so. I am not saying this wont work but I think someone needs to talk to a tuner before making this modification. My two cents. thanks [/QUOTE]
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How-To
Return style wiring HOW TO allowing OE type fuel pump actuation
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