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

Reply
 
LinkBack Thread Tools Display Modes
Old 07-04-2022, 03:10 PM   #1
495 fun car
 
Join Date: May 2021
Location: Nampa
Posts: 6
Fuel leak from top of tank, no CEL

Boxster S, 2004
I fueled up the other day and the nozzle did not shut off automatically. I had fuel leaking from under the car, not overflowing from the top of the filler tube. I don't have any codes and the car runs fine. I've got it raised and put a little fuel in the filler tube and some fuel flows from the top of the tank someplace. I can't tell exactly where it's coming from, but I'm assuming its a vent. Time to drop the tank. Ugh!

TPISP495 is offline   Reply With Quote
Old 07-04-2022, 05:34 PM   #2
Motorist & Coffee Drinker
 
78F350's Avatar
 
Join Date: Jul 2014
Location: Oklahoma
Posts: 3,264
Garage
You can get easy access to the fuel sending unit and hoses by removing the battery and battery tray. If it's leaking from the top, that is the most likely area for a problem. No need to drop the tank unless all of that looks good.

This Tech Article at Pelican has most of the procedure outlined with pics.

https://www.pelicanparts.com/techarticles/Boxster_Tech/22-FUEL-Fuel_Pump/22-FUEL-Fuel_Pump.htm
__________________
I am not an attorney, mechanic, or member of the clergy. Following any advice given in my posts is done at your own peril.
78F350 is offline   Reply With Quote
Old 07-05-2022, 01:50 PM   #3
495 fun car
 
Join Date: May 2021
Location: Nampa
Posts: 6
changed the sender last year

78F350 --I should have commented earlier that I changed the sender last year because it was leaking. It has not leaked since I changed it, and it is not currently leaking. I tried to get my wire camera up above the tank, but I haven't been able to see anything obvious yet. I put the camera down around the back of the top of the sender unit and I am unable to see any obvious problems.
TPISP495 is offline   Reply With Quote
Old 07-05-2022, 02:58 PM   #4
Registered User
 
Join Date: Feb 2005
Location: It's a kind of magic.....
Posts: 5,961
Quote:
Originally Posted by TPISP495 View Post
78F350 --I should have commented earlier that I changed the sender last year because it was leaking. It has not leaked since I changed it, and it is not currently leaking. I tried to get my wire camera up above the tank, but I haven't been able to see anything obvious yet. I put the camera down around the back of the top of the sender unit and I am unable to see any obvious problems.
Take the battery out and look.
__________________
Anything really new is invented only in one’s youth. Later, one becomes more experienced, more famous – and more stupid.” - Albert Einstein
JFP in PA is offline   Reply With Quote
Old 07-05-2022, 04:36 PM   #5
495 fun car
 
Join Date: May 2021
Location: Nampa
Posts: 6
I have inspected the top of the sending unit, and I put my camera down into the sending unit access port to inspect around it. No obvious leaks or parts breakage. That's one of the first things I did to check to see if there was a problem with the sending unit.
TPISP495 is offline   Reply With Quote
Old 07-05-2022, 09:53 PM   #6
495 fun car
 
Join Date: May 2021
Location: Nampa
Posts: 6
Talking UPDATE: found the leak!

I was pulling the fuel lines off the top of the sending unit and the unit lifted up. I had inspected the fuel sending unit a couple of times since I first noticed fuel spilling, but I hadn't yanked on the fuel lines. I tugged on them, but apparently not hard enough. I never saw fuel in the top or around it, and I didn’t smell fuel when I lifted the cover from the battery tray. When I replaced it over a year ago I must not have seated it properly. All looked well and it was snug enough to keep things working properly, but not snug enough to keep fuel from spilling while fueling. I inspected the ring to make sure it wasn't cracked and put it back on SECURELY. I’ll finish putting it back together tomorrow and take it for a drive. Troubleshooting rule #1—Start at the point/location where it was touched last!

TPISP495 is offline   Reply With Quote
Reply

Tags
fuel leak at tank , fuel tank


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 06:02 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2022, 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