Go Back   986 Forum - for Porsche Boxster & Cayman Owners > Announcements > New Member Introductions

LinkBack Thread Tools Display Modes
Old 06-06-2019, 04:07 PM   #1
Registered User
Join Date: May 2019
Location: East Coast
Posts: 3
My Starving Boxster

Hey guys I just recently picked up a barn find Boxster. Mice and racoons were living and eating it away and I decided to try to save her. To make a very long story short shes a 1999 Boxster and I have the DME / immobilizer bypassed with a relay jumper so that she will crank. And she is cranking - if I add some fuel to the carb she fires up for a couple seconds. So I jumped the fuel pump relay and nothing so I replaced the fuel pump with a new one. Fuel pump sound is now heard only if I have the fuel pump relay jumpered; but no fuel to the back schraider valve! I remove the fuel pressure valve and no fuel shooting out of there either. My pump is running... could it be going in reverse somehow. There were a bunch of chewed up wires that I had to reconnect and repair. Is there anything I can try? Shes starving for fuel and I cant get it to her!!!

Last edited by DMags; 06-06-2019 at 04:10 PM.
DMags is offline   Reply With Quote
Old 06-06-2019, 07:48 PM   #2
Registered User
BYprodriver's Avatar
Join Date: Oct 2008
Location: O.C. CA
Posts: 3,150
Mice love to eat insulation off the wires. I would guess the DME bypass you did prevents the engine from starting. It's possible your key battery is to weak also. you will get more info by searching the main forums
2000 S Speed YellowLN 3.6L cylinders & pistons, triple row IMSB upgrade, R&R connecting rods, billet tensioner paddle,oilpump driveshaft.Heads rebuilt by F6I with new valves & springs.Cayman airbox & MAF housing, 996 intake plenum & 75mm T/B. NHP sport converters &Dansk muffler

Last edited by BYprodriver; 06-06-2019 at 07:51 PM.
BYprodriver is offline   Reply With Quote
Old 06-07-2019, 06:16 AM   #3
Registered User
Join Date: May 2019
Location: East Coast
Posts: 3
Thanks for the reply, but I believe fuel would still be sent to the back.

New update: I reversed the polarity of the fuel pump and now fuel is flowing to the back fuel pressure unit and shooting out while removed but never makes it to the Schrader valve when its put back in its place(which is a pain!). I guess its a bad fuel pressure regulator? I didnt think it could stop all fuel flow!??

DMags is offline   Reply With Quote
Old 06-07-2019, 07:03 AM   #4
Registered User
The Radium King's Avatar
Join Date: Apr 2010
Location: Canada
Posts: 2,862
plugged fuel filter.
The Radium King is offline   Reply With Quote
Old 06-07-2019, 12:21 PM   #5
Registered User
Join Date: May 2019
Location: East Coast
Posts: 3

So I bought an aftermarket fuel pump on ebay for like 75$ and it was wired reversed. So without removing it I cut and soldered the green/white wire to the brown and brown to the green/white. Reverse the polarity and fuel was shooting through the system. Now id like to do a pressure test, but I need to research the Porsche schrader valve adapter so I can hook up my pressure tester.

Thanks for the ideas guys!
DMags is offline   Reply With Quote

no fuel

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 Off
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -8. The time now is 03:26 AM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2019, vBulletin Solutions, Inc.
Content Relevant URLs by vBSEO 3.6.0
Copyright 2018 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website -    DMCA Registered Agent Contact Page