TPS/Fuel Pump Relationship?, Jumped the fuel pump and took it for safety, winters project now. |
|
Porsche, and the Porsche crest are registered trademarks of Dr. Ing. h.c. F. Porsche AG.
This site is not affiliated with Porsche in any way. Its only purpose is to provide an online forum for car enthusiasts. All other trademarks are property of their respective owners. |
|
TPS/Fuel Pump Relationship?, Jumped the fuel pump and took it for safety, winters project now. |
Jon H. |
Sep 9 2013, 07:52 PM
Post
#1
|
Member Group: Members Posts: 237 Joined: 1-July 11 From: Ottawa, Canada Member No.: 13,264 Region Association: Canada |
As the title states what do these two things have in common that would cause them both to stop functioning at the same time? No clicks from TPS and no 1.5 sec running of fuel pump. I have checked the engine wiring harness for continuity and all is good, the ECU is getting power, the pump will run if jumped, I get injector pulse while cranking, power at coil, swapped relay board with another, power at fuse #8, checked grounds at engine and at ECU plug.
I have read that a failing TPS will cause an engine to buck as the TPS cuts fuel off to the injectors but could the TPS actually cause the fuel pump not to cycle in key on position? If the engine will run with out the TPS plugged in then I assume that it shouldn't cause the fuel pump to not cycle? I have had this running for about a week now and it would fire right up and I went out tonight and now it won't start. Any ideas? Jon |
luskesq |
Sep 9 2013, 09:41 PM
Post
#2
|
Member Group: Members Posts: 276 Joined: 24-October 10 From: Fresno, CA Member No.: 12,303 Region Association: Central California |
In addition check your relay on the board in the engine bay. Don't believe there is any correlation between a bad TPS and the fuel pump not working. You can swap in one of the other relays on the board (make sure it works) to see if you have a bad relay. There is a way to jumper the relay socket for the fuel pump to see if the pump works but I don't recall the two pins to jump. Perhaps someone else will chime in on that.
Good luck, Keith |
Lo-Fi Version | Time is now: 7th June 2024 - 03:42 AM |
All rights reserved 914World.com © since 2002 |
914World.com is the fastest growing online 914 community! We have it all, classifieds, events, forums, vendors, parts, autocross, racing, technical articles, events calendar, newsletter, restoration, gallery, archives, history and more for your Porsche 914 ... |