 Help please....no start! |
|
|
|
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. |
|
|
| MikeM |
 Jun 25 2012, 10:13 AM
Post
#1
|
|
Senior Member  Group: Members Posts: 564 Joined: 16-May 10 From: Calgary, Canada Member No.: 11,733 Region Association: Canada  |
Hi guys...
I have a no start condition on my 74 2.0 liter,D-jet. Seems like the fuel pump is not running. As per my crappy manual, I have checked for power at pins 87 and 86 where the pump relay plugs in. There is no power at either pin with the key on. Manual says if that is the case, then start checking ignition wiring. Obviously, I'm missing something. Swapped out relays with no luck also. Any help really appreciated.... Mike |
   |
 
|
  |
Replies
| Tom |
Jun 26 2012, 05:55 AM
Post
#2
|
|
Advanced Member Group: Members Posts: 2,139 Joined: 21-August 05 From: Port Orchard, WA 98367 Member No.: 4,626 Region Association: None |
Mike,
So you have no power to pin #85 of the fuel pump relay socket with the power relay in and the key switch to on? Try a couple of jumpers on the relays to check them for operation as in my earlier post. You can also spread the male pins a little to ensure good contact in the socket. Just use a knife and gently spread the four pieces apart slightly. Sounds like your fuel pump failed, but I don't understand why that would cause your relay board to suddenly have issues unless possibly the fuel pump overloaded the circuits and caused some otherwise hidden issues to appear. These electrical circuits are pretty old and can give strange indications. Just take it one step at a time and we can find the problem. Tom |
|
|
|
Posts in this topic
MikeM Help please....no start! Jun 25 2012, 10:13 AM
JRust
Hi guys...
I have a no start condition on my 74 ... Jun 25 2012, 10:18 AM 76-914 use this and you will nail it.
http://members.renn... Jun 25 2012, 11:23 AM Tom Mike,
Before you go running wires here and the... Jun 25 2012, 12:19 PM stuttgart46 You may want to check your relay as well. Jun 25 2012, 01:30 PM MikeM Thanks for the suggestions guys...
Tom, how do I c... Jun 25 2012, 03:03 PM Tom Mike,
To check the relay/relays you can use a ... Jun 25 2012, 06:20 PM MikeM Tom...I've swapped around relays with no luck.... Jun 25 2012, 06:58 PM MikeM Did a little more trouble shooting tonight. I have... Jun 25 2012, 10:14 PM MikeM Tom...that's correct, no power to pin 85. Only... Jun 26 2012, 06:48 AM MikeM One more question....assuming I need a new fuel pu... Jun 26 2012, 08:50 AM vsg914 Since its already relocated to the front, use the ... Jun 26 2012, 09:23 AM
Tom I agree with Curt on the later pumps.
As for tes... Jun 26 2012, 12:45 PM |
1 User(s) are reading this topic (1 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 9th May 2025 - 09:24 AM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.