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03-28-2007, 10:03 PM
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#1 |
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Registered User
Join Date: Feb 2007
Location: ARKANSAS
Posts: 35
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87 TBI fuel pump nightmare
the previous owner had the fuel tank switch go out and replaced with two toggle switches so who knows how many times it was turned on wrong. I replaced with a new switch. The problem is it was runnin fine then just quit. Its not gettin fire to the pumps, either side. I got a new relay, didnt realize i needed 2, but it didnt help at all. I can use a jumper wire and get each pump to work. I have one wire at the tank switch underneath that is hot. Cant find a fuse that is blown either. ANYBODY got any ideas.
Last edited by 808486CHEVY; 03-28-2007 at 10:06 PM. |
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03-29-2007, 08:38 AM
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#2 |
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Gentleman Jim Driver
Join Date: Nov 2002
Location: Poulsbo, WA
Posts: 1,553
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Re: 87 TBI fuel pump nightmare
Which tank switch did you buy? Was it specifically for an 87?
Give us the wire colors at the switch and at the relays and tell us what voltage is on them when the truck is Key On Engine Off. Also, make sure you can catch when the ECM cycles the fuel pump and then it shuts off when you first turn on the key.
__________________
Joe '75 GMC Gentleman Jim '84 Chev C10 Short Wide - Super duper plain (manual steering, manual brakes, no dome light, no cig lighter) '85 Chev C10 Short Wide - Super plain Vortec 4.8 4L60E trans also: '81 K30, '83 C30 Crew Dually, '84 M1028 CUCV, '85 M1009 CUCV, another '85 C10 SWB, '89 R3500 Flatbed |
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