87 GMC TBI: Fuel Pump Issues - The 1947 - Present Chevrolet & GMC Truck Message Board Network

lpbaca · 02-22-2005, 01:51 PM

Anyone have an idea as to why one of the fuel pumps don't ingage when switched over? I have replaced the relays, pumps, and dashboard switch. The left tank will only work intermittantly. I heard there is a switching valve on the frame that controls the gas flow for both tanks. Any suggestions?

87 STEPPER · 02-22-2005, 08:07 PM

Well you replaced everything but that so it's a good chance that's the problem.

But the first thing id'e do is remove the connector at the valve and check for Pwr. to both tanks befor you buy a new valve.

02-22-2005, 01:51 PM	#1
lpbaca Registered User Join Date: Feb 2005 Posts: 1	87 GMC TBI: Fuel Pump Issues Anyone have an idea as to why one of the fuel pumps don't ingage when switched over? I have replaced the relays, pumps, and dashboard switch. The left tank will only work intermittantly. I heard there is a switching valve on the frame that controls the gas flow for both tanks. Any suggestions?

02-22-2005, 08:07 PM	#2
87 STEPPER STILL PLAYS WITH TRUX Join Date: Nov 2002 Location: Melbourne, Fla. Posts: 2,764	Well you replaced everything but that so it's a good chance that's the problem. But the first thing id'e do is remove the connector at the valve and check for Pwr. to both tanks befor you buy a new valve. __________________ ~~Bruce~~ MY 87 STEPPER MY 99 2D/WD TAHOE

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