 L-Jetronic Dual Relay on 1.8, Followed the old thread but pumps now runs without key in ignition |
|
|
|
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. |
|
|
| motorvated |
 Mar 15 2013, 10:26 PM
Post
#1
|
|
Member  Group: Members Posts: 282 Joined: 13-February 13 From: Colorado Member No.: 15,519 Region Association: Rocky Mountains  |
My fuel pump was running continuously with the key in the "on" position, so I found the old thread dealing with wiring the dual relay properly and testing the Air Flow Sensor and followed the diagnostics and testing stated in there. Air Flow Sensor tested fine, wiring as specified, and now the pump runs with no key in the ignition. I think the pump was re-wired to run through the ignition switch, which I know was wrong. Now I think I may have a bad ignition side on the dual relay. The relay has two numbers on it. Ignition side says 071 906 059. The FI side says 0332 514 129. All connectors are designated on the relay with the same numbers in the same positions as the 120 that the old thread used. The old thread was great to follow as long as things went as planned. In this case, the result was a failure to operate correctly once all the wiring was reconfigured. Any help out there?
|
   |
 
|
  |
Replies
| timothy_nd28 |
Mar 15 2013, 11:01 PM
Post
#2
|
|
Advanced Member Group: Members Posts: 2,299 Joined: 25-September 07 From: IN Member No.: 8,154 Region Association: Upper MidWest 
|
Sorry, I'm too lazy to re-read that old thread. Plus, not all problems fit the same mold, yours may take a different direction. I guess my first question would be, does the car run? The fuel pump is turned on by 2 sources, one being the contacts within the AFM (which energizes the dual relay) and the other being the ignition switch in the "start" position, which also energizes the dual relay. You say the fuel pump runs, as soon as you turn the key to the "on" position? If so, let's try to isolate the problem. The fuel pump should not be activated with the ignition switch in the "on" position, unless the car is running. Go ahead and turn the key to the "on" position, as you stated earlier, the fuel pump turns on. Pull the connector off the AirFlow meter, does the pump turn off? If it doesn't turn off, yank out the dual relay. After yanking the dual relay, did the fuel pump turn off? If so, measure pin 86a at the dual relay connector, (it should be the yellow wire). Do you have 12vdc here? Can you post a pics of your dual relay, and your setup?
|
|
|
|
Posts in this topic
motorvated L-Jetronic Dual Relay on 1.8 Mar 15 2013, 10:26 PM
motorvated
Sorry, I'm too lazy to re-read that old threa... Mar 16 2013, 07:47 AM
timothy_nd28 Interesting, but it's fine, connector no conne... Mar 16 2013, 10:17 AM motorvated
Interesting, but it's fine, connector no conn... Mar 16 2013, 02:29 PM motorvated
Interesting, but it's fine, connector no con... Mar 16 2013, 02:49 PM timothy_nd28 Pin 86 on the relay works with the thermotime swit... Mar 16 2013, 02:38 PM timothy_nd28 I just read your little side note at the end, you ... Mar 16 2013, 10:26 PM motorvated
I just read your little side note at the end, you... Mar 16 2013, 11:45 PM motorvated Correction, wire on 86c is coming off of + termina... Mar 16 2013, 11:58 PM timothy_nd28 Much more sense! So the fuel pump has a new w... Mar 17 2013, 12:13 AM motorvated
Much more sense! So the fuel pump has a new ... Mar 17 2013, 07:45 AM motorvated
Much more sense! So the fuel pump has a new... Mar 17 2013, 12:06 PM timothy_nd28 Good to hear 0 voltage on 86a, it means that your ... Mar 17 2013, 12:19 PM motorvated
Good to hear 0 voltage on 86a, it means that your... Mar 17 2013, 12:38 PM motorvated
Good to hear 0 voltage on 86a, it means that you... Mar 17 2013, 01:03 PM timothy_nd28 Yah, you're correct with the spring operation.... Mar 17 2013, 01:08 PM motorvated
Yah, you're correct with the spring operation... Mar 17 2013, 01:22 PM timothy_nd28 It was my pleasure. I would give you my spare, bu... Mar 17 2013, 02:15 PM |
6 User(s) are reading this topic (6 Guests and 0 Anonymous Users)
0 Members:
|
Lo-Fi Version | Time is now: 27th December 2024 - 12:45 PM |
Invision Power Board
v9.1.4 © 2024 IPS, Inc.