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| Odd electrical issue: Tachometer & temp go out after moving 6" WHAT?; At idle, tach/temp ok. Roll car, and tach goes out, temp spikes! | |
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| Tweet Topic Started: Aug 5 2014, 10:56 AM (387 Views) | |
| jacques kruseo | Aug 5 2014, 10:56 AM Post #1 |
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Elite Member
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I'm lost on this one. At idle, in neutral, tachometer and temp normal. If I push my car forward about 6 inches, the tachometer drops to 0, and the temperature spikes to the top. Then, it returns. But the car has to roll about 6 inches forward. But wait, if I'm at idle, and the gauges are reading fine, I push the car backwards 6 inches, and it does the same exact thing!!!!!! Lastly, while driving, the tachometer is working but doesn't seem to match the real RPM's. And the temp gauge moves up during acceleration. Just before all this, it was having trouble starting. The starter seemed to be going out, and I'd have to turn the key from 2-10 times before it would start. Replaced the starter, but had no juice. Battery tested, cleaned all posts and cables, started up just fine. ECU, bad ground, burned wires somewhere??? I'm so lost! |
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| Woodie | Aug 6 2014, 05:54 AM Post #2 |
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Bad ground to the cluster, it's getting a ground through the speedometer cable. |
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| Hotrodray1 | Aug 6 2014, 06:23 AM Post #3 |
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Over Educated parts guy
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It will burn speedo cable if u don't ground engine to body. I have had cable melt because of bad body to engine ground. Like woodie said it could also be your ground to back of cluster ck your connection on back of it.
Edited by Hotrodray1, Aug 6 2014, 06:24 AM.
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| jacques kruseo | Aug 6 2014, 10:03 AM Post #4 |
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Elite Member
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Thank you. I pulled the tach and sure enough a lead on the 1st connector had a burn mark. Repaired and it's working. I've gone over all the ground connections I can get to, but I believe the manual says G203 is for the cluster, and that is located on the inner firewall, behind the airbox/heater core. Has anyone every gained access to this without removing everything??? I've looked but I can't see it from either side with the carpet pulled back. Justin |
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| Woodie | Aug 7 2014, 06:53 AM Post #5 |
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If you can't get to it, then verify for certain that you have the correct wire at the cluster connector, and just splice into it and run a fresh ground wire. |
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