Replacing fuel pump in 1990. Help!

[deadhed61]

The fuel pump in my runner just stopped working (lasted 200k tho!!) and was looking for some help. Anybody dropped the fuel tank before? I need some helpful tips and advice on how to get this out so that I can switch it out the pump. I'm just worried that when I drop it I might rip some wires or tubes that should be disconnected prior to removing it.

 

[deadhed61]

Well, it turns out the fuel pump is still good it's just not getting any power when the key is in the ON position. I checked all fuses. Nothing seems to be blown. Does anyone know if there is a fuel pump relay??? And where it is? I can't find any info about it online!!

 

[deadhed61]

Update:

No fuses are blown and I also checked the COR. It is outputting 12V when the key is ON, so it seems to be working fine. I'm having trouble tracing the wiring from the COR to the Fuel Pump to try and find any breaks.

Is there any other type of relay that controls/powers the fuel pump besides the COR????

 

[cometobanks]

In an 87 the BCM going bad can cause that.

 

[deadhed61]

BCM? Not sure if the 90' has this? What does BCM stand for. Are you referring to the ECU?

 

[cometobanks]

Yes, sorry. mixing GM and Toy terms. I burnt up my ECM once and lost fuel pump function

 

[deadhed61]

Well, its not the COR, not the MAF sensor, not the Fuel Pump, not the EFI relay, not the fuses.....????????

Is there a way you can test the ECM???

 

[fourwd1]

Jump the +B and Fp terminals in the engine check connector and see if it works. That will bypass all the interlocks.

 

[99blackSE]

There is a fuel pump relay. I got a spare lying around somewhere...