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Fuel Pump Help for 85 GL SW
Posted 22 July 2003 - 09:14 PM
It left me stranded for the first time ever, would crank but not start.
I suspect fuel flow problems, I started by checking voltage at the fuel pump with the ignition on. Voltage was zero.
As usual, my Haynes manual was worthless, but it implied the car had a "fuel pump controller" and possibly a fuel pump relay.
Can anyone give me the basics of how the fuel pump works on this car? And when I should be seeing voltages? And where the electronics are located?
Posted 23 July 2003 - 03:58 AM
Posted 23 July 2003 - 06:21 PM
I DID notice that the box (and two additional ground wires) was only loosely attached. The screws, which also hold the hood release handle, were stripped.
I've fixed the ground problem and am charging the battery now, to retest, with fingers crossed.
Pls let me know if you think I've stumbled on the wrong box. Thanks for the advice!!
Posted 23 July 2003 - 08:31 PM
Posted 27 July 2003 - 09:47 AM
Of course, things never happen the easy way--I went to start the car after charging, and the battery was still dead--I guess this incident finally finished it -- but I got 7 years out of a 5-year battery!
But I tested the pump as you suggested and it worked. I was surprised at the noise it made, kind of a glugging sound, I guess I was expecting a whine sort of like a winshield washer pump. I jumpstarted the car, and it started up fine.
Regarding the box, I suspect it must be some sort of solid state version of the pump relay you have in your brats. It did have the red/blue wire leading out of it, and was in the same place as you described. There's a picture in my haynes manual of the box as you decribed it, it definitely wasn't mine.
The only other explanation could be that the box had nothing to do with it, and it was the other ground wire that was loose in addition to the box, or it was a battery problem all the time. I doubt this, since on the day it died it had enough juice to crank the engine during several hours of troubleshooting. I think it was the recharger that fried it.
Thanks for the assistance,
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