 Yet another "no power to fuel pump" thread... |
|
|
|
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. |
|
|
| kpfoten |
 Jul 6 2009, 09:03 PM
Post
#1
|
|
Member  Group: Members Posts: 220 Joined: 15-April 08 From: Escanaba, MI Member No.: 8,927 Region Association: None  |
'73 1.7L D Jet I'm not getting voltage to the fuel pump. Continuity from relay board connector to pump. Pump works with direct voltage. I'm getting 12V to relays. Both pump relay and main relay are good (run headlights and click). 12V to fuse both sides, new fuse. Tried measuring voltage to pump when I power on the key and crank. Looks like a small registration on my voltmeter (in the mV range). Also tried test light--no power. Visits to websites for fuel pump troubleshooting given in previous forums (testing relay board, etc) seem normal. Considering fuel injection harness/III connector--I can jump this to ground to see if the pump runs, correct?? Any other options? Thanks! |
   |
 
|
  |
Replies
| swl |
Jul 7 2009, 10:07 PM
Post
#2
|
|
Senior Member Group: Members Posts: 1,409 Joined: 7-August 05 From: Kingston,On,Canada Member No.: 4,550 Region Association: Canada |
Yup - that's what I would do. Pull the harness off at the ECU (awkward if you have a backpad). Test the continuity of the wire that goes to III.
Not likely that the harness has gone bad but you may find the connector is corroded. If you go to Brad Anders site you'll find a complete list of checks that you can use to check the wiring harness. In addition to the III wire the +12V has to be good and the ground as well. Brad documents which pin is which on the harness. |
|
|
|
Posts in this topic
kpfoten Yet another "no power to fuel pump" thread... Jul 6 2009, 09:03 PM
McMark
This terminal must be grounded to trigger the FP ... Jul 7 2009, 01:23 PM swl yes you're good to go with pulling that four p... Jul 7 2009, 06:14 PM Dr Evil Make sure that your AAR is not shorting your syste... Jul 7 2009, 07:16 PM
914_teener
Make sure that your AAR is not shorting your syst... Jul 7 2009, 07:21 PM jimkelly pin 3 Jul 7 2009, 08:13 PM Dr Evil Here is my schematic to show what I was talking ab... Jul 7 2009, 08:22 PM kpfoten Great--thanks guys.
The heater was disconnected a... Jul 7 2009, 08:43 PM kpfoten Grounding III results in power to fuel pump.
Wha... Jul 7 2009, 09:16 PM kpfoten Yet another newbie mistake!
I mis-read a thre... Jul 8 2009, 10:11 AM underthetire Mine grounded on a spade terminal on the engine. U... Jul 8 2009, 11:00 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 - 12:21 PM |
Invision Power Board
v9.1.4 © 2025 IPS, Inc.