Cascade Crew

Xophertony · Posted: Mon Aug 27, 2007 10:57 pm Post subject: GTA fuel pump stuck on

so i got out of my car at work today and the fuel pump remained on... i waited a few minutes and it remained on. when i got home tonight i unplugged the negative battery termanal.

does anyone know where the fuel pump relay is? i unplgged those three by the brake booster and the fuel pump remained on, i can't remamber where the FP relay is.

thanks.

Twilightoptics · Posted: Tue Aug 28, 2007 12:05 am Post subject:

One of them should be it.

If it's not up by the booster check along the fender.

Xophertony · Posted: Tue Aug 28, 2007 12:07 am Post subject:

thanks paul. mine are no longer on the bracket, and it was dark. i bet i'll find it tomorow in the daylight.

blue89 · Posted: Tue Aug 28, 2007 7:06 am Post subject:

Definetly sounds like the relay.

Where did you put the relays then if they are no longer on the bracket?

Xophertony · Posted: Tue Aug 28, 2007 9:13 am Post subject:

uhm... they just kind of sit there in the fender. and since i have done that this is the second one to fail. i am thinking there is somthing to that bracket. i may have to relocate my ultracoil and replace the bracket. Sad

Al Hasse · Posted: Tue Aug 28, 2007 9:26 am Post subject:

That may have something to do with moisture. That bracket holds the relays upright so what little moisture gets to them doesn't interfere with the connections.

Xophertony · Posted: Tue Aug 28, 2007 9:32 am Post subject:

huh.. good thinking al.

alloy · Posted: Tue Aug 28, 2007 10:08 am Post subject:

When you change the relay out, make sure that the wire terminals don't push down into the connector. I have had problems twice with bad connections in the fuel pump and maf relay sockets.

I recently had a SES light for a low fuel pump voltage. Did some checking and found out that when I installed the relay, the wire terminal had pushed back down in the socket barely making a connection. After awhile it apparently worked it's way further out causing a bad connection and low voltage. I checked the voltage to the pump before pushing the terminal back up into the harness plug, and then after. Went from 11 volts to 13.7 with the engine running. And, last week I had a code 33 MAF high code. Same thing, pushed the wires back up into the connector and problem solved.

There is a lot of play in the plug where the terminals go. Easy enough to push them all up and check to see that they are all pushed completely in.

Xophertony · Posted: Tue Aug 28, 2007 10:58 pm Post subject:

ok, i replaced the relay i thought was it and it did not change a thing. dos anyone know what the wir ecolors are? my chiltons manual has NO wire diagrams, and my factory manual is still ina box somewhere.

thanks guys.

BigDaddyVu · Posted: Tue Aug 28, 2007 11:44 pm Post subject:

did you check you pressure switch? all its doing is recirculating the fuel with the key on the off position right? you should disconect the relay and check the voltage on the connector and to see which one has power and which one is the switchable power. perhahaps a short it the wire harness as it comes though the firewall. this is kinda odd unless someone improperly installed a capacitor or did some wiring to the ignition switch itself.

Twilightoptics · Posted: Wed Aug 29, 2007 12:19 pm Post subject:

Unplug the oil pressure switch.

Fuel Pump Relay Wires:
Ore = Relay Power
Tan = Power to Pump (Relay On)
Green = ECM Signal
BLK = Ground

Fuel Pump Switch:
Ore=Power
Tan=Power to Pump/MAF relay

Xophertony · Posted: Wed Aug 29, 2007 9:46 pm Post subject:

well shizzle. I wired the fuel pressure switch when i switched to the 89+ style. used a brand new one too. f***ing napa parts.

Twilightoptics · Posted: Wed Aug 29, 2007 10:23 pm Post subject:

Was that the problem?

Xophertony · Posted: Wed Aug 29, 2007 11:32 pm Post subject:

i don't know yet. gonna hafta wait until friday. i work 2pm-midnight tomorow.