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Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? 200 1990

posted by curiousheights on Sun Dec 30 07:56 CST 2007
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last visit: Thu May 21 03:42 CST 2009

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Many thanks to jbowser for helping me to discover my error. I was looking at the fuel injector ECU, not knowing that the ignition ECU was directly behind and slightly above it on the firewall (not on the exterior wall).

I have 11.73 volts to pin 6, continuity to pin 20, but no continuity to ground on pin 14. Bentley 280.11.4 says to check the ground wires under the intake manifold.

I see one yellow wire in a plastic clip attaching midway back (coming out of a red wrap)and a couple of other wires that look like they are attached to sensors.

Would someone please be my knight on a shiny (or grungy) keyboard and let me know what I'm looking for? I don't want to break something else, especially if all I've been looking for all this time is a bad ground.

Thank you to all who've tried to help so far!
ezsha
--
'84 244, Peter, never drove. Robbed to fix Paul, '86 244 - drove for 2 years; holey saint now, passing parts to Paul Jr, '90 244, now driving. Friends w/ '90 245, jokingly aka Mary, (pregnant sedan & completes PPM trilogy). Daughter to unnamed '90 745.

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Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? [200][1990]
posted by curiousheights on Sun Dec 30 07:56 CST 2007 >

Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? [200][1990]
posted by bluedot on Sun Dec 30 09:15 CST 2007 > V
- I'm trying to get it out of my mechanic's dooryard. I'm looking for the two specific ground wires so I can get it 50 miles back home. [200][1990]
  posted by curiousheights on Sun Dec 30 09:26 CST 2007 > V
  - I'm trying to get it out of my mechanic's dooryard. I'm looking for the two specific ground wires so I can get it 50 miles back home. [200][1990]
    posted by rstarkie subscriber on Sun Dec 30 10:34 CST 2007 > V
    - A million thanks for the picture! n.m.i. [200][1990]
      posted by curiousheights on Sun Dec 30 11:03 CST 2007 > V
  - I'm trying to get it out of my mechanic's dooryard. I'm looking for the two specific ground wires so I can get it 50 miles back home. [200][1990]
    posted by boxvolvo on Sun Dec 30 14:21 CST 2007 > V
    - Taking the day off, but ice on the fuel injection ecu #572, lower pins. removed and dried. n.m.i. [200][1990]
      posted by curiousheights on Mon Dec 31 11:08 CST 2007 > V
    - I'm trying to get it out of my mechanic's dooryard. I'm looking for the two specific ground wires so I can get it 50 miles back home. [200][1990]
      posted by pageda on Mon Dec 31 11:22 CST 2007 > V

Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? [200][1990]
posted by yama on Sun Dec 30 10:33 CST 2007 > V
- Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? [200][1990]
  posted by rstarkie subscriber on Sun Dec 30 10:50 CST 2007 > V
  - Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? [200][1990]
    posted by yama on Sun Dec 30 11:14 CST 2007 > V
    - Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? [200][1990]
      posted by rstarkie subscriber on Sun Dec 30 12:32 CST 2007 > V
- 11.73 volts hopefully because it has not run in a while and I have been trying to start it. n.m.i. [200][1990]
  posted by curiousheights on Sun Dec 30 11:06 CST 2007 > V
- Another learning experience, plus requesting help for using spray gold and finding plastic weather connectors. [200][1990]
  posted by curiousheights on Thu Jan 17 10:55 CST 2008 > V
  - Another learning experience, plus requesting help for using spray gold and finding plastic weather connectors. [200][1990]
    posted by jbowser on Thu Jan 17 11:00 CST 2008 > V
    - No start after fixing fuel rail ground... [200][1990]
      posted by curiousheights on Thu Jan 17 11:18 CST 2008 > V
      - No start after fixing fuel rail ground... [200][1990]
        posted by jbowser on Fri Jan 18 00:29 CST 2008 > V

Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? [200][1990]
posted by jbowser on Sun Dec 30 14:34 CST 2007 > V

Found the two grounds on the fuel rail... replaced the pretty turquoise one in the rear, but still working on the problem. n.m.i. [200][1990]
posted by curiousheights on Mon Dec 31 11:13 CST 2007 > V
- Found the two grounds on the fuel rail... replaced the pretty turquoise one in the rear, but still working on the problem. n.m.i. [200][1990]
  posted by jbowser on Tue Jan 1 07:17 CST 2008 > V

Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? [200][1990]
posted by jbowser on Sat Jan 5 01:27 CST 2008 > V
- I'm currently in NC helping my sister... battle resumes Friday, 11 Jan. n.m.i. [200][1990]
  posted by curiousheights on Tue Jan 8 03:34 CST 2008 > V

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Please let my no power to ECU thread die, and help me find the ground wires under the intake manifold? 200 1990