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Join Date: Feb 2009
Location: Park Hills, KY
Posts: 2,459
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tach not working
I have searched and found a couple threads on this. but never any solutions.
86 944 turbo. when I got this project running, the TACH did not work. swapped a known good tach from another cluster that had a bad speedo. still not working. so suspecting the cluster ribbon cables. swapped cluster and still the new cluster's tach does not work. car starts right up and runs great. during rebuild and initially getting running, swapped both sensors and even verified clean signals to the DME. probblem turned out to be a bad coil. so I am now suspecting something in the wiring from the DME to the cluster. also looked at Clark's garage and did not find any TACH troubleshooting guide. thoughts and suggestions? PS. just got it back up on jack stands to replace the clutch. installing a SPEC stage III and alum fly wheel.
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Bob Cox 78 930 clone project car. 87 924S resurrect at some point. 84 928S, Ruby Red linen/brown interior - sold  86 944 turbo my new DE/track car - sold
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09-07-2014, 06:16 AM
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Join Date: Jul 2004
Location: Upstate New York
Posts: 3,261
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The coil gets the same signal that the tach does, if the wiring is correct. Since your coil is working and the engine runs, check your wiring to the tach.
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Good luck, George Beuselinck |
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09-07-2014, 07:05 AM
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Location: Park Hills, KY
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does anyone have the details of what to check? what pin(s) from the DME wiring to what pin(s) on the TAC connections?
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Bob Cox 78 930 clone project car. 87 924S resurrect at some point. 84 928S, Ruby Red linen/brown interior - sold 86 944 turbo my new DE/track car - sold
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09-08-2014, 04:21 AM
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Join Date: Jul 2004
Location: Upstate New York
Posts: 3,261
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Quote:
Bench testing gauge cluster...mostly tachometer - Rennlist Discussion Forums
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Good luck, George Beuselinck |
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09-08-2014, 04:53 AM
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Join Date: Feb 2009
Location: Park Hills, KY
Posts: 2,459
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thanks for that link. looks like exactly the info I needed.
now have the 951 back up on jack stands to install a new SPEC stage III clutch pack and light weight alum flywheel. will now include chasing the tach issue.
__________________
Bob Cox 78 930 clone project car. 87 924S resurrect at some point. 84 928S, Ruby Red linen/brown interior - sold 86 944 turbo my new DE/track car - sold
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09-10-2014, 06:48 AM
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