Please help! tach troubles?
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Please help! tach troubles?
I've looked around the site a little, but can't seem to find much. Can't figure out where I put my manual either, otherwise I would have checked it, but....
My tach is acting up. It sometimes works fine, but when it doesn't it misbehaves in one of two ways... (truck is '88 4runner, 22re 5speed)
-totally misbehaving: erratic needle wandering, bouncing anywhere from 0-redline numbers regardless of throttle
-kinda misbehaving: erratic needle wandering during off-throttle (coasting)
Could this simply be a loose wire? My initial thought was a sending unit, but with no manual at the time to help me diagnose, I guess it could be the tach itself. Thoughts? Best way to troubleshoot this? I'm not sure if the tach/sending unit can be tested, and I'm a beginner when it comes to using my multimeter.
Thanks!
-Chris
My tach is acting up. It sometimes works fine, but when it doesn't it misbehaves in one of two ways... (truck is '88 4runner, 22re 5speed)
-totally misbehaving: erratic needle wandering, bouncing anywhere from 0-redline numbers regardless of throttle
-kinda misbehaving: erratic needle wandering during off-throttle (coasting)
Could this simply be a loose wire? My initial thought was a sending unit, but with no manual at the time to help me diagnose, I guess it could be the tach itself. Thoughts? Best way to troubleshoot this? I'm not sure if the tach/sending unit can be tested, and I'm a beginner when it comes to using my multimeter.
Thanks!
-Chris
Last edited by babyfood1217; 08-27-2008 at 06:18 PM. Reason: forgot imp. info
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I guess I should add that it engine performance doesn't seem to be affected at all (no reliable tach to look at, but...). I found a few posts about high idles and surges, but it's not really the engine. I just put new plugs/cap/rotor in about 5k ago, but not wires.
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