 Need 3.2 conversion electrical help |
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| mepstein |
 Aug 13 2017, 12:20 PM
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914-6 GT in waiting  Group: Members Posts: 19,876 Joined: 19-September 09 From: Landenberg, PA/Wilmington, DE Member No.: 10,825 Region Association: MidAtlantic Region 
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I can't get my fuel pump to run unless I jumper the plug for the DME relay. The car starts and runs with the connection jumped but the fuel pump then runs all the time. Just want to know where to look and what to do.
I'm very electrically challenged so you might need to really dumb it down for me. Thanks |
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| McMark |
Aug 14 2017, 07:02 AM
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914 Freak! Group: Retired Admin Posts: 20,179 Joined: 13-March 03 From: Grand Rapids, MI Member No.: 419 Region Association: None |
If you've tried the DME in other cars and they run....
And you've tried multiple DME Relays and none work.... That only leaves the wiring itself and the AFM. Disconnect the DME wiring. Pull the DME Relay. Multimeter on Ohms, test between DME pin 20 and Relay pin 85b. If that works tests good (0 ohms)... The fuel pump only runs when the AFM flapper is open. So get access to the air filter side of the AFM, turn the key on (everything reconnected), and push the door open. That SHOULD turn on the pump. If it doesn't, the wiring between the AFM and the DME may be suspect, or the AFM contacts inside may be suspect. |
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Posts in this topic
mepstein Need 3.2 conversion electrical help Aug 13 2017, 12:20 PM
Steve You did try another dme relay? Otherwise the Bent... Aug 13 2017, 01:06 PM Spoke I had a similar problem on my 930. Engine would ru... Aug 13 2017, 01:21 PM mepstein Tried 4 new relays. One was solid state.
Flummoxe... Aug 13 2017, 01:30 PM
Spoke
Tried 4 new relays. One was solid state.
Flummox... Aug 13 2017, 02:04 PM porschetub The solder joints can also fail on them too,pop th... Aug 13 2017, 01:36 PM mepstein
The solder joints can also fail on them too,pop t... Aug 13 2017, 01:45 PM Spoke
I jumper the plug for the DME relay.
Which pins... Aug 13 2017, 02:11 PM Spoke Some tests with your voltmeter:
put a small wire ... Aug 13 2017, 02:14 PM Steve This manual is awesome!!
Aug 13 2017, 03:34 PM Steve RE: Need 3.2 conversion electrical help Aug 13 2017, 03:36 PM Steve RE: Need 3.2 conversion electrical help Aug 13 2017, 03:42 PM jim912928 I hate wiring...do you have the red wire (fuel pum... Aug 13 2017, 06:38 PM mepstein
I hate wiring...do you have the red wire (fuel pu... Aug 13 2017, 06:42 PM Spoke Looks like a pretty simple circuit:
1) Ignition k... Aug 13 2017, 07:20 PM mepstein I know the dme is good. Runs fine in other cars. Aug 13 2017, 08:30 PM Steve Do what Spoke suggested and put an ohm Meter on pi... Aug 13 2017, 09:24 PM mepstein
Do what Spoke suggested and put an ohm Meter on p... Aug 13 2017, 09:46 PM shoguneagle Do not over look the DME Relay socket itself; shor... Aug 13 2017, 10:02 PM jim912928 The AFM point is a good one. Before I put my 3.2l ... Aug 16 2017, 05:30 PM Spoke Mark and Ray stopped by my house today to do some ... Aug 19 2017, 09:27 PM timothy_nd28
Things to do to finish the install:
1) Figure out... Aug 22 2017, 09:12 AM mepstein Huge step to have the engine start with the turn o... Aug 20 2017, 08:08 AM Cairo94507 Glad to hear you resolved that issue and will be d... Aug 20 2017, 08:23 AM jim912928 congrats! Aug 20 2017, 10:24 AM |
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