Coke Posted August 8, 2012 Report Share Posted August 8, 2012 I've had tachometers in the past that have been a bit 'slow' to react, and kinda hang.....don't really keep the pace with the engine's actual speed. I know it's not normal because I have also had tachometers that are right on pace with engine rpm fluctuation. I was wondering if anyone knew how to fix the tachometer to make it accurate quick again? I've already tried cleaning/inspecting the tachometer signal wire at the coil. It's definitely very clean...I even sanded the eyelet down and cleaned the coil post on re-assembly. I feel the problem is the tachometer itself. Sometimes when i shut my car off, the tachometer needle doesn't quite drop all the way down to '0'....and with a gentle flick of the finger against the cluster lense it drops to '0'. This tells me the tachometer could use cleaning inside, and/or lubricating if that's at all possible. Has anyone had a tachometer apart, and knows what causes this condition?? Link to comment Share on other sites More sharing options...
Komeuppance Posted August 8, 2012 Report Share Posted August 8, 2012 It's the needle catching, or the components behind it. Take it apart, clean it, apply some light oil. -Robert Link to comment Share on other sites More sharing options...
Crazy larry Posted August 8, 2012 Report Share Posted August 8, 2012 Or swap in a different one. from the horded parts collection Link to comment Share on other sites More sharing options...
Coke Posted August 8, 2012 Author Report Share Posted August 8, 2012 It's the needle catching, or the components behind it. Take it apart, clean it, apply some light oil. -Robert Well that's a start. I've never had a tachometer apart before. Can you elaborate a little bit, as far as what I should expect to see, and what comes apart, ect? Link to comment Share on other sites More sharing options...
Indiana Posted August 9, 2012 Report Share Posted August 9, 2012 The tach needs the resistor in line to work properly. That's the little metal thing. That other wire only goes to the ECU it has nothing to do with the instrument cluster tach. There's two SEPARATE circuits, one for the ECU, one for the instrument cluster. When you hear someone say if your tach jumps that means the car must run if you spray fuel into the throttlebody, that's not true the ECU might still not see the tach signal. Link to comment Share on other sites More sharing options...
Woody Posted July 19, 2014 Report Share Posted July 19, 2014 Did you ever work out what this was? I am seeing the same issue on my starion. Cheers Link to comment Share on other sites More sharing options...
Coke Posted July 19, 2014 Author Report Share Posted July 19, 2014 I did not. :/ Link to comment Share on other sites More sharing options...
Woody Posted July 20, 2014 Report Share Posted July 20, 2014 Joy, I was really hoping to solve this issue Link to comment Share on other sites More sharing options...
Woody Posted October 25, 2014 Report Share Posted October 25, 2014 Well I solved the problem. The solution is the best kind as well I took the car to the track. A complete day of racing and the tacho has fixed itself. I guess it just needed some lubrication and movement? Link to comment Share on other sites More sharing options...
Recommended Posts