jon95dsm
Proven Member
- 50
- 10
- Mar 7, 2014
-
Wilmington,
North_Carolina
I'd like to see if I can wire my fuel pump a certain way but first here is some information about why I'm asking.
Ever since I installed a Walbro 255 and Aeromotive fpr I've had an issue with the fuel pump randomly cutting off. I usually can't re-start immediately but I can after waiting 10 minutes or so. I rewired the pump with the STM kit and nothing changed. About a month ago I posted asking about this problem and after a discussion I decided to replace the OEM relay. That didn't fix anything either.
What I have to figure out now is whether I have an electrical issue or a faulty pump. I have read some threads about diagnosing the electrical system but all of those threads were about no-start issues. Since my problem is so intermittent I'm not sure if I would see the electrical problem even if that ends up being the culprit.
What I'd like to do to determine if my problem is electrical or the pump is re-wire the power wire that acts as a signal wire to the STM relay. I would do this by putting a fuse on a 12v switched source, running that to a manual on/off switch, and then connect it to the signal wire on the STM relay. This would allow me to have full control over whether I'm sending power to the STM relay or not. I would be bypassing the oem sensors, ecu, and relay. If I still get random pump loss, I know I have either a bad pump or a loose/dirty connector at the pump. If I don't, I know my problem is either a sensor, wiring, the ecu, or the oem relay.
Would there be any adverse effects to running the pump wiring this way? I didn't see any threads that mentioned ECU-controlled fuel flow for cruising or anything like that but I wanted to be sure I won't mess anything up by doing this.
Ever since I installed a Walbro 255 and Aeromotive fpr I've had an issue with the fuel pump randomly cutting off. I usually can't re-start immediately but I can after waiting 10 minutes or so. I rewired the pump with the STM kit and nothing changed. About a month ago I posted asking about this problem and after a discussion I decided to replace the OEM relay. That didn't fix anything either.
What I have to figure out now is whether I have an electrical issue or a faulty pump. I have read some threads about diagnosing the electrical system but all of those threads were about no-start issues. Since my problem is so intermittent I'm not sure if I would see the electrical problem even if that ends up being the culprit.
What I'd like to do to determine if my problem is electrical or the pump is re-wire the power wire that acts as a signal wire to the STM relay. I would do this by putting a fuse on a 12v switched source, running that to a manual on/off switch, and then connect it to the signal wire on the STM relay. This would allow me to have full control over whether I'm sending power to the STM relay or not. I would be bypassing the oem sensors, ecu, and relay. If I still get random pump loss, I know I have either a bad pump or a loose/dirty connector at the pump. If I don't, I know my problem is either a sensor, wiring, the ecu, or the oem relay.
Would there be any adverse effects to running the pump wiring this way? I didn't see any threads that mentioned ECU-controlled fuel flow for cruising or anything like that but I wanted to be sure I won't mess anything up by doing this.