 Fuel pump options, Staying in its original location |
|
|
|
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. |
|
|
| emerygt350 |
 Apr 13 2023, 07:59 PM
Post
#1
|
|
Advanced Member  Group: Members Posts: 2,882 Joined: 20-July 21 From: Upstate, NY Member No.: 25,740 Region Association: North East States  |
I am having a very specific issue here. Pump no longer holds pressure after shutdown. Original location, original three port pump. It still pumps great when running, but no longer holds pressure. Need to fix that and quick. Do I have to replace it or can it be repaired?
|
   |
 
|
  |
Replies
| brant |
Apr 14 2023, 11:39 AM
Post
#2
|
|
914 Wizard Group: Members Posts: 11,949 Joined: 30-December 02 From: Colorado Member No.: 47 Region Association: Rocky Mountains 
|
I had a 3 port fail this way with the pressure holding feature.
3 ports have this built in. I was able to open the pump... and replace the rubber to freshen the holding pressure feature... symptoms before repair were loss of pressure when sitting with engine off... over 20 minutes or so.... no leaking injectors... lots of cranking to rebuild the pressure before it would start... 20 seconds of cranking instead of 1 second.... ultimately I didn't trust that pump even after repair... so installed a 2 port pump and put the 3 port into my travel spare bag. |
|
|
|
Posts in this topic
emerygt350 Fuel pump options Apr 13 2023, 07:59 PM
r_towle I would suggest you test the injectors, including ... Apr 13 2023, 08:21 PM r_towle https://members.rennlist.com/pbanders/DJetParts.ht... Apr 13 2023, 08:22 PM emerygt350 This is after shutdown. I will have to check the ... Apr 14 2023, 04:06 AM emerygt350 "Failed Check Valve: The check valve keeps th... Apr 14 2023, 04:13 AM emerygt350 Hmm seems that "check valve" is debated ... Apr 14 2023, 09:40 AM emerygt350 After an hour, pressure back down to 0. Nothing i... Apr 14 2023, 10:27 AM emerygt350 Engine was nice and hot. Parked. Pressure was 24 ... Apr 14 2023, 10:59 AM r_towle The way to check your injectors is to remove the n... Apr 14 2023, 11:05 AM emerygt350 Or you just remove them from the system like I did... Apr 14 2023, 11:18 AM emerygt350 I think this is some boyles law stuff. The fuel n... Apr 14 2023, 11:22 AM Olympic 914 Why do you need to have the pressure hold when the... Apr 14 2023, 11:40 AM
wonkipop
Why do you need to have the pressure hold when th... Apr 14 2023, 09:49 PM emerygt350 Is your pump under your engine or has it been relo... Apr 14 2023, 01:24 PM burton73 Well, the factory moved the pump up front under th... Apr 14 2023, 01:59 PM emerygt350 Yes, absolutely. That is what I need to do but my... Apr 14 2023, 02:06 PM wonkipop interesting read @[url=http://www.914world.com/bb... Apr 14 2023, 09:34 PM wonkipop @[url=http://www.914world.com/bbs2/index.php?showu... Apr 16 2023, 11:38 PM emerygt350 Very interesting! I have had stupid old v8s t... Apr 17 2023, 05:19 AM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2025 - 01:05 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.