Diagnosis of an incorrect tachometer
Thread Starter
Junior Member
Joined: Apr 2001
Posts: 27
Likes: 0
From: houston,texas
Diagnosis of an incorrect tachometer
My tach is consistantly off by about 1800 rpm, but it zeros when the car is off. The tach always seems to redline (or close to it) under mild acceration, and under hard acceleration it actually goes past 7000 ... Its all stock ignition. Car is a 91 RS with HEI. Any one know where to start?
Supreme Member
Joined: Sep 2001
Posts: 6,111
Likes: 53
From: Ontario, Canada
Car: 1988 Firebird S/E
Engine: 406Ci Vortec SBC
Transmission: TH-350/3500stall
Axle/Gears: 7.5" Auburn 4.10 Posi-Traction
Yes, I'd start by picking up the phone and
calling my local recycler to see if they have
a replacement tach for ya....
calling my local recycler to see if they have
a replacement tach for ya....
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