Tach not accurate
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Joined: Oct 2002
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From: Toms River, NJ
Car: '89 Camaro Rs/ '87 Z28
Engine: 305 c.i. TBI/ 305 c.i. 4bbl
Transmission: 700r4/T5
Axle/Gears: 3.73 posi/ 3.73 posi
Tach not accurate
What would cause a tach to misread? It says the RPMs are much higher than they really are. Says idle is 3500 and it pins when I accelerate. I have an 89 305tbi camaro. Nothing has been touch recently or changed it just started doing this all the sudden.
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Joined: Mar 2009
Posts: 817
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From: Stoughton, MA
Car: 1985 camaro Z28
Engine: 305 5.0 V8 carburated
Transmission: 700r4
Re: Tach not accurate
Mine does the same thing...there are a few threads on here about it as it's a VERY common problem with these cars.
Just do a quick search for "tach problem" or "tach fix".
Just do a quick search for "tach problem" or "tach fix".
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Joined: Jul 2003
Posts: 2,779
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From: any clime or place...
Car: 1987 Camaro SC, 1999 Z28
Engine: GMPP 350HO, LS1
Transmission: Built 700r4/EDGE 3200, T56
Axle/Gears: 3.42 Eaton 7.625, 3.42 Zexel Torsen
Re: Tach not accurate
My 89 Iroc is the same way. I also idle around 3500 and pin when I put the gas on. If I drive for a while it sometimes moves down to 2800ish but it typically runs around 3500. I'll ignore it for now, but I'd really like it to at least be in the neighborhood since I'm more or less restoring my car.
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1999, 89, 97, a4, accurate, camaro, inaccurate, inacurracy, irock, misread, misreading, problem, read, tach, tacho, tachometer, z28
