Go Back   986 Forum - The Community for Porsche Boxster & Cayman Owners > Porsche Boxster & Cayman Forums > Performance and Technical Chat

Post Reply
 
LinkBack Thread Tools Display Modes
Old 03-22-2009, 05:25 PM   #1
Registered User
 
Join Date: Jun 2007
Location: NW Indiana
Posts: 156
Fuel Pump Wiring

I have a question:

On a 2002 Boxster S, where is the routing for the fuel pump, meaning where does the wiring from the pump enter the cabin? And does it go straight to the pump relay?

My car lost a lot of power, then quickly stalled and won't start. As it happened, it gave a few codes that said it was extremely lean.

I don't seem to hear the fuel pump come on when the key is turned, and I hooked up a fuel pressure gauge to the plug on the fuel rail, and it doesn't move the gauge at all. I know the relay is good, along with the fuse. I did the relay bypass recommended in the manual, and that didn't change anything.

So I am thinking that the fuel pump might have electrically went-out. I don't know if it could be a wiring problem, so I wanted to trace the wiring. I will probably remove the battery tomorrow, and seeing if it is getting power.

Any ideas?
Thanks,

cheetah is offline   Reply With Quote
Old 03-22-2009, 05:34 PM   #2
Porsche "Purist"
 
Paul's Avatar
 
Join Date: Aug 2003
Location: Wisconsin
Posts: 2,123
Garage
The next thing is to check for 12v at the pump so you are on the right track. If you have 12V, pull the plug and check the resistance of the pump to see if it's open.
__________________
1998 Boxster with 7.8 DME, 2005 3.6 liter/325 hp, Variocam Plus, 996 Instrument panel
2001 Boxster original owner. I installed used motor at 89k.
1987 924S. 2002 996TT. PST-2
Owned and repaired Porsches since 1974. Porsche: It's not driving, it's therapy.
Paul is offline   Reply With Quote
Old 03-24-2009, 03:54 AM   #3
Registered User
 
Join Date: Jun 2007
Location: NW Indiana
Posts: 156
Fuel Pump is dead. I put 12V on it, and nothing. I am surprised it went out at 70K. That seems a little early for any car, especially ours.

Oh well, a few days, and I will be back up.
cheetah is offline   Reply With Quote
Old 03-26-2009, 03:58 PM   #4
Registered User
 
Join Date: Jun 2007
Location: NW Indiana
Posts: 156
It was the Fuel Pump. The old one didn't respond at all to 12V. Put a new pump in from Sunset, and a few seconds later, started right up. Constant 55 or so psi. I will look at the old one once it dries to see and see the culprit. Only 70K on the car, it is very surprising that it failed this quickly.

cheetah is offline   Reply With Quote
Post Reply


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On




All times are GMT -8. The time now is 08:45 AM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2024, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2024 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page