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  1. G

    Is this the correct ecm

    ECM has nothing to do with startup spark. Cam and Crank sensor both have to be functional to initiate a spark. Two fuses relative to the ignition should be checked.
  2. G

    Emission Vacuum Metal Lines

    I've got a set of powdercoated lines if you're interested.
  3. G

    Wiring worry-wort

    I used to build custom harnesses that way, when someone wanted a "stealth" harness. Ran the alternator output under the runners as well along with every sensor. Even built injector connections that would run under it. Then, at the firewall under the ignition module, I'd install bulkhead...
  4. G

    More 86/87 wiring diagram questions for the experts

    The C437 connector is near the ECM connections down at the passenger kick panel area. It's a double sided white connector and is plugged into one or two black connectors that go to the dash wiring.
  5. G

    More 86/87 wiring diagram questions for the experts

    That power feed for the ignition module isn't in the C100 bulkhead connector, it's in the C437 (white) connector. The CCCI module power is the only pink/black feed that's not at the large bulkhead.
  6. G

    Rear defogger switch lights

    Not likely the bulb. Probably the dimmer switch circuit. Does the defogger get warm? First push will be 10 minutes, after that, the second push will run it 5 minutes. After that, pushing the switch twice will shut off the lamp and the defogger.
  7. G

    Tach sensor wire not by alternator

    There will be two white wires, not one. Someone could have removed them from the green connector, tied them together, and buried them somewhere in the harness. But they are there somewhere.
  8. G

    D/side Engine Bay Electrical Question

    Keep it unplugged. In fact, there's another 3 cavity connector on the same delay relay. Unplug that as well. The delay relay is frequently a source of electrical system gremlins and is not needed.
  9. G

    Fuel Pump Relay ignorance

    http://www.installationinstructions.com/FYI/relaylocations.pdf
  10. G

    Assessing digital HVAC control

    Years ago, I built a test set for that control head, but haven't ever really used it for servicing them. Been sitting on the shelf although I can probably diagnose your C68 with it.
  11. G

    I don't know anything about the car but I hope they are ok.

    Photoshopped. With heat that intense, the tires would have absolutely melted. Someone started with a GNX image, and put some time into PS. Forgot to put reflections in the windows on the house, though. Where are the onlookers, FD, etc.? Makes no sense now, does it? Fake as it gets. Fooled us...
  12. G

    Coolant temp idiot light stays on, on start up.

    That's what was strange about that connection; the wire would pick up coolant in the center, not leak outside. Look at the ECM for signs of coolant in it.
  13. G

    Coolant temp idiot light stays on, on start up.

    Early 84 cars had a problem with the 1-wire coolant temp sensor. They'd fail, coolant would work its way into the ECM through the wire itself, and cause damage to the ECM connector. Check to see if you have the 1-wire sensor instead of 2 wire.
  14. G

    Problem with the tach not working

    The original LEDs are long gone and obsolete, so the next best colors were chosen. They're much more efficient than those 80s LEDs and will last forever.
  15. G

    Problem with the tach not working

    If the tach display and/or boost display goes to full scale or close to it, the unit is defective and needs to be rebuilt. They all will fail in this fashion eventually. Genetic defect causes this to happen. Caspers Electronics will repair it, or offer a replacement part. Read about it...
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