Cascade Crew

Twilightoptics · Posted: Sun Sep 26, 2004 1:39 pm Post subject: Fuel pump primes when car is off

What gives, tried to different relays, and my fuelpump is priming every couple minutes with the car off!? WTF?

Checked connections, nothing seems to be shorting.... computer isn't switched on.... um?

JohnnyIROC-Z · Posted: Mon Sep 27, 2004 11:45 am Post subject:

Well It has to be getting power from somewhere, IIRC it just grounds out a side in order to provide power flow through the FP right? if so it must be from the relay to the pump where it's grounding out. Sometimes I hate electronics!

Twilightoptics · Posted: Mon Sep 27, 2004 6:54 pm Post subject:

The ECU supplies 12v to switch the relay on.

chevymad · Posted: Mon Sep 27, 2004 7:49 pm Post subject:

Remember that theres a parallel circuit through the fuel pump switch as well. If its shorting it could be turning the pump on.

Twilightoptics · Posted: Mon Sep 27, 2004 7:53 pm Post subject:

CheezX · Member Joined: 16 Jan 2004 Posts: 90

Do you have the newer style 3-wire oil pressure sensor? It 's a backup switch for the fuel pump circuit. If oil is above 4 psi it'll turn on. Could be stuck or bad.

Twilightoptics · Posted: Wed Sep 29, 2004 12:31 pm Post subject:

That switch re-routes maf power on my car. And that switch is not existant on the commander setup Wink

Twilightoptics · Posted: Wed Sep 29, 2004 7:14 pm Post subject:

Something is turning the commander 950 on and off because the commander relay operates when the fuel relay does.... pulled the ecu out can't see any shorts.... works while key is on so I guess i'm not too worried about it till i can find a pattern.

Schultzy89GTA · Posted: Wed Oct 06, 2004 7:39 pm Post subject:

You figure this out yet?

-Curious in Clackamas

Twilightoptics · Posted: Thu Oct 07, 2004 12:32 pm Post subject:

Nope, something is still clicking the commander on. Not sure how or what, no wires are crossed or anything. Each time I get the tools out to watch the switch line, it wont do it *of course*

Schultzy89GTA · Posted: Thu Oct 07, 2004 10:25 pm Post subject:

Did you try saying 'Do It, Do It'? That may help.

-Schultzy

90RSrocks · Posted: Fri Oct 08, 2004 11:08 pm Post subject:

Here's my suggestion: I've noticed that cursing under my breath seems to help with little problems. Seems that yelling loudly at the problem area works best for big problems. Just my experience though. Shrug

Of course you could do an ancient "healing dance" next to the car for the ultimate in results, but we need you to be sure to videotape it and post it for all to see. Wink