Fuel Pump not priming!!!
Fuel Pump not priming!!!
Hey guys, got my 93 back together and now the damn pump won't turn on... Any help would be greatly appreciated, Thanks
91 GMC Syclone
88 GTU 330k
89 GTU 5 speed
93 GTZ quaser quad
93 GT Garnet 5 speed
01 2500 HD
77 K-10
64 El Camino Ls1-T56
94 Z26 (parts car) rust belt rust bucket
88 GTU 330k
89 GTU 5 speed
93 GTZ quaser quad
93 GT Garnet 5 speed
01 2500 HD
77 K-10
64 El Camino Ls1-T56
94 Z26 (parts car) rust belt rust bucket
Re: Fuel Pump not priming!!!
oil pressure switch/sensor
override it with the lonely mysterious plug under hood near wiper motor and driver side strut tower
override it with the lonely mysterious plug under hood near wiper motor and driver side strut tower

1990 Beretta GTZ 1995 Beretta Z26 1996 Beretta Z26
Re: Fuel Pump not priming!!!
I tried putting power to that and nothing.
Re: Fuel Pump not priming!!!
Also, I cranked it over until I seen oil pressure, the car ran when I parked it. I find it hard to believe the pump took a crap while it was parked.
- Money pit Beretta
- Registered User
- Posts: 6411
- Joined: Thu Jul 26, 2007 11:36 am
- Location: Kansas
Re: Fuel Pump not priming!!!
The relay has power and ground to it, I'm going to jack it up and see if I can unplug it at the tank and check there.
91 GMC Syclone
88 GTU 330k
89 GTU 5 speed
93 GTZ quaser quad
93 GT Garnet 5 speed
01 2500 HD
77 K-10
64 El Camino Ls1-T56
94 Z26 (parts car) rust belt rust bucket
88 GTU 330k
89 GTU 5 speed
93 GTZ quaser quad
93 GT Garnet 5 speed
01 2500 HD
77 K-10
64 El Camino Ls1-T56
94 Z26 (parts car) rust belt rust bucket
Re: Fuel Pump not priming!!!
I think you have a problem at the fuel pump then. I believe the wire bypasses the relay anyhow

1990 Beretta GTZ 1995 Beretta Z26 1996 Beretta Z26
- Money pit Beretta
- Registered User
- Posts: 6411
- Joined: Thu Jul 26, 2007 11:36 am
- Location: Kansas
Re: Fuel Pump not priming!!!
I unplugged the harness above the fuel tank, no power on the gray, but 9 volts on the purple wire, bad relay? Does anybody know if there's supposed to he more than one hot present at the relay plug?
91 GMC Syclone
88 GTU 330k
89 GTU 5 speed
93 GTZ quaser quad
93 GT Garnet 5 speed
01 2500 HD
77 K-10
64 El Camino Ls1-T56
94 Z26 (parts car) rust belt rust bucket
88 GTU 330k
89 GTU 5 speed
93 GTZ quaser quad
93 GT Garnet 5 speed
01 2500 HD
77 K-10
64 El Camino Ls1-T56
94 Z26 (parts car) rust belt rust bucket
Re: Fuel Pump not priming!!!
Simple test.
With the connector unplugged from the floorpan just above the tank, jump the bypass for the pump (the lonely pigtail by the driver's side shock tower), then go checking for voltages at the connector. Unplug the bypass and check again, that will tell you if you are getting a hot for the pump. I don't know what colors are what under there, but that will eliminate the wiring. No that doesn't eliminate the relay, but if you are getting power to the rear connector by the tank with the bypass, then the pump is not working....... The only other thing would be if there is an issue with the grounding for the pump? Meaning you have a hot, but nowhere for it to go once it gets there.
With the connector unplugged from the floorpan just above the tank, jump the bypass for the pump (the lonely pigtail by the driver's side shock tower), then go checking for voltages at the connector. Unplug the bypass and check again, that will tell you if you are getting a hot for the pump. I don't know what colors are what under there, but that will eliminate the wiring. No that doesn't eliminate the relay, but if you are getting power to the rear connector by the tank with the bypass, then the pump is not working....... The only other thing would be if there is an issue with the grounding for the pump? Meaning you have a hot, but nowhere for it to go once it gets there.
94' Z26 Project - 95' Base Project - Custom LED Light Conversions!
Chosen Proposal Submission & Committee Member for Beretta Fest 2012 in Traverse City Michigan


Chosen Proposal Submission & Committee Member for Beretta Fest 2012 in Traverse City Michigan


Re: Fuel Pump not priming!!!
Thanks ace, I'll check it out tomorrow...
91 GMC Syclone
88 GTU 330k
89 GTU 5 speed
93 GTZ quaser quad
93 GT Garnet 5 speed
01 2500 HD
77 K-10
64 El Camino Ls1-T56
94 Z26 (parts car) rust belt rust bucket
88 GTU 330k
89 GTU 5 speed
93 GTZ quaser quad
93 GT Garnet 5 speed
01 2500 HD
77 K-10
64 El Camino Ls1-T56
94 Z26 (parts car) rust belt rust bucket