![]() |
Tach issues
The coil on my 86 arced to the primary side and now the tach is pinned past the red line. Car still runs like a new one. Thinking it could be either the DME driver circuit or the tach, can anyone tell me if there is a check I can do to verify the tach signal from the DME is OK? I do not have an oscilloscope, only a voltmeter. Thanks
|
I think that to check the signal from the ECU, you need a O Scope.
You do know someone that got a scope... Start with an A and finish with a X (4 letters) :) My bet is on a less then a $ diode in the gauge |
Thanks for the reminder JJ Can anyone tell me what kind of trace etc the DME tach output will produce? Also, if anyone knows if a multimeter can be used to verify the DME tach signal, that would be great.
|
Take the tach out and disconnect its signal line but keep power and GND connected. If it's still pegging you have a bad tach.
The DME puts out a square wave and you will need an o-scope to properly measure that |
Thanks Ischmitz, that's exactly what I needed to know. I'll be on that this weekend.
|
All times are GMT -8. The time now is 09:24 AM. |
Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2025, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2025 Pelican Parts, LLC - Posts may be archived for display on the Pelican Parts Website