Fuel Pump Stuttering and Dying
#1
Full Member
Thread Starter
Fuel Pump Stuttering and Dying
Hey guys,
About 700km ago, I installed a holley red fuel pump to go with my rebuilt 12a and holley carb (from racingbeat). At this time I also changed the fuel filter and installed a fuel pressure gauge. The pump is electric and super loud, so I can tell when it's working! I've had no issues until now.
Three days ago I was on a freeway going about 90kph when I heard the pump sputter and quit. I pulled over as the car died and spent about a half hr on the side of the road. Eventually I turned off the cabin fan and the pump came back on, and I managed to get home. The fuel pump sounded like it was struggling, and my fuel pressure was bouncing in sharp spikes between 3 and 6 psi.
Then two days ago I was running errands and came back to the car after about an hour, and the pump was totally dead. I had to get it towed home.
What I've tried:
- checked the plugin for the pump and it registers a steady 12.4V
-checked fuel lines for leaks/kinks/damage and found nothing
- re-soldered the stock plug to the fuel pump, thinking it was a faulty connection. The pump starts now but my fuel pressure is still all over the place and sounds like it's really fighting to move.
Before I buy a new fuel pump, could it be something other than a faulty pump?
Thanks
Roland
About 700km ago, I installed a holley red fuel pump to go with my rebuilt 12a and holley carb (from racingbeat). At this time I also changed the fuel filter and installed a fuel pressure gauge. The pump is electric and super loud, so I can tell when it's working! I've had no issues until now.
Three days ago I was on a freeway going about 90kph when I heard the pump sputter and quit. I pulled over as the car died and spent about a half hr on the side of the road. Eventually I turned off the cabin fan and the pump came back on, and I managed to get home. The fuel pump sounded like it was struggling, and my fuel pressure was bouncing in sharp spikes between 3 and 6 psi.
Then two days ago I was running errands and came back to the car after about an hour, and the pump was totally dead. I had to get it towed home.
What I've tried:
- checked the plugin for the pump and it registers a steady 12.4V
-checked fuel lines for leaks/kinks/damage and found nothing
- re-soldered the stock plug to the fuel pump, thinking it was a faulty connection. The pump starts now but my fuel pressure is still all over the place and sounds like it's really fighting to move.
Before I buy a new fuel pump, could it be something other than a faulty pump?
Thanks
Roland
Last edited by UnregisteredSA22C; 08-20-17 at 03:44 PM. Reason: Forgot to add something
#2
ancient wizard...
Was the pump new,what did the old fuel filter look like,what does the one in the car now look like?Was/is filter in of front of pump or after pump. If after pump is it possible junk/trash from gas tank has gotten into pump? Connect voltmeter into pump circuit and run/drive car while its acting up and observe voltage. Should be steady/not erratic,about 13.5 volts with car running.
#3
HeyHeyHey..Its the Goose
iTrader: (3)
Are you running your fuel dead headed or do you have a return line hooked up?
How long did you have the car running prior to the Holley swap? So can we rule out bad fuel tank gunk.
EDIT: test your pump before you buy a new one. Just plug it into a 12VDC source and run some water through it. (don't run it dry)
How long did you have the car running prior to the Holley swap? So can we rule out bad fuel tank gunk.
EDIT: test your pump before you buy a new one. Just plug it into a 12VDC source and run some water through it. (don't run it dry)
#4
Full Member
Thread Starter
Thanks for the answers! I'll try testing the pump using a different power source, and have a look at the voltage as I drive.
I bought the pump new, and the filter is installed before the pump. I don't have a return line. Prior to the Holley install it wasn't running at all (sat for about 15 years). When I fixed it up I didn't remove the tank but I did pump out as much of the old gas as I could.
Roland
I bought the pump new, and the filter is installed before the pump. I don't have a return line. Prior to the Holley install it wasn't running at all (sat for about 15 years). When I fixed it up I didn't remove the tank but I did pump out as much of the old gas as I could.
Roland
#5
Full Member
Thread Starter
Thanks for the help everyone. I got a carter fuel pump and installed it and everything's been running great! The carter is a lot quieter than the holley too.