1982 fuel pump hums but no gas at rail?
12-26-2014, 11:28 AM
#1
Drifting
Thread Starter
1982 fuel pump hums but no gas at rail?
Pump and filter was replaced in FEB 2009. SOUNDS like pump is working when jumped. I have confirmed 12+ volts at pump. Have checked fuel seeps at fuel fitting into and out of pump / filter of so I would not think there is a blockage. All new fuel lines but no fuel to rails. I can place a finger over an open fuel rail and "feel" no pressure. Tank has 4 gallons of new gas.
Have read some about the impeller coming off inside pump. ?
Could the fuel pressure regulator be the issue ?
Thoughts on where to go next?
Have read some about the impeller coming off inside pump. ?
Could the fuel pressure regulator be the issue ?
Thoughts on where to go next?
12-26-2014, 03:20 PM
#2
Basic Sponsor
Rennlist
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Rennlist
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Fuel at pump could be head pressure from tank.
Reverse the wires on the pump after removing the tank to pump hose from the pump (crimp it).
See if it pukes out any bits of plastic - pump could be seized and still hum.
Reverse the wires on the pump after removing the tank to pump hose from the pump (crimp it).
See if it pukes out any bits of plastic - pump could be seized and still hum.
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission?
George Layton March 2014928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
12-26-2014, 08:58 PM
#3
Drifting
Thread Starter
Okay, Thanks Roger...got fuel now.
I think I have GREEN WIRE problems. The PO has cut off the green wire connector from the main harness. I have another green wire but not sure how to go about adding the male end to harness. Can the green wire be soldered to the main harness?
I think I have GREEN WIRE problems. The PO has cut off the green wire connector from the main harness. I have another green wire but not sure how to go about adding the male end to harness. Can the green wire be soldered to the main harness?