Tach accuracy fixes for 91'
Thread Starter
Instructor
Joined: Feb 1999
Posts: 136
Likes: 0
From: baltimore, maryland
Tach accuracy fixes for 91'
I have a 91 coupe and I've noticed that the tach is way off now after the winter standby to the order of 500 rpm higher reading then prior. Is there a fix for this or am I going to have to live with it?
TIA:
TIA:
Race Director
Joined: Feb 2004
Posts: 12,518
Likes: 19
If the tach in the cluster is responsible for the inaccuracy, I don't know the answer. If the tach signal is the reason for it being off, an aftermarket ignition box may help. They have a port for the tach signal. Just a thought.
Le Mans Master
Joined: Feb 2005
Posts: 5,146
Likes: 3
From: The Motor City
I would think by having the cluster recalibrated would help, try a search. I remember awhile back some members having that done with good results. I am using a zr1 cluster and if I can trust the ecm signal to the scanner/laptop it is about 150 rpm off. A shift light and rev. llimiter helps (straight to tach lead above the tach filter) as I am not relying entirely on the tach.
Thread Starter
Instructor
Joined: Feb 1999
Posts: 136
Likes: 0
From: baltimore, maryland
Pete K:
I just happen to be using a Jacobs ignition and never gave a thought to switching to that. Out comes the wiring diagrams.
Seven:
I did a search on tachmeter and checked all but nothing came up before I posted the first time hoping to avoid a duplicate thread. If you find it, link it please.
Jan
I just happen to be using a Jacobs ignition and never gave a thought to switching to that. Out comes the wiring diagrams.
Seven:
I did a search on tachmeter and checked all but nothing came up before I posted the first time hoping to avoid a duplicate thread. If you find it, link it please.
Jan
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