Tach problems
#1
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Car: 91 camaro rs
Engine: 305 (350 vortec in dec.)
Transmission: Wc-T5
Axle/Gears: 3.08 (3.42 in dec.)
Tach problems
I just bought my 91 rs 4'months ago never thought bought it bc I know where to shift. Now, it's starting to annoy me.... When at idle, my tach reads between 2500-3000 rpms and thee car is probably running 500-800 rpms, idk what normal is. Would this be a busted tach, bad wire, fuse? What could fix this? Any help would be great, thanks
#2
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Car: 1990 camaro rs
Engine: 5.0L 305 tbi
Transmission: 700r4
Axle/Gears: 2.73
Re: Tach problems
From what ive read a lot of peoples tachs are off and i dont think its an easy fix from what i read, mine sits at the redline all the time, i just got a autometer tach im gonna use instead. Do a search in the electronics section i believe
#3
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Car: 89 rs vert/88 t/a GTA
Engine: 355 tbi/350 tpi
Transmission: 700r4 w/megashifter/700r4
Axle/Gears: 3.73/???
Re: Tach problems
I have the same problem in my 89 rs.I just figured something wasn't hooked up properly when the previous owner swapped an l05 in or he replaced the tach with one out a v6 car.
#4
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Car: 1991 camaro rs convertible
Engine: Built ls1
Transmission: T56
Axle/Gears: 3:42
Re: Tach problems
An aftermarket tach such as autometer would be a good alternative and are more accurate then the stock tach. I had the same problem with my original tach and a swapped out the entire guage cluster for a working one and put in an autometer tach as well.
#5
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Car: 91 R/S , 89 dodge p/u
Engine: L31 GM crate re-cammed , 318
Transmission: T-5 , 4 speed auto
Axle/Gears: 3.42 , ?
Re: Tach problems
a common problem with 90-92 camaros . (mine has it) there are fixes , try a search for the problem (90-92 tach fix) . i just live with mine , i'm a cruiser , not a racer . good luck .
#6
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Car: 1989 camaro rs convertable
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: 7.5"3.42 gears forth gen 2000 camar
Re: Tach problems
all the third gen tachs go bad.i have a two"tach and unplugged the dash tach.there are people on tgo that have posted repair solutions but its over my head.
#7
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Car: 91 camaro rs
Engine: 305 (350 vortec in dec.)
Transmission: Wc-T5
Axle/Gears: 3.08 (3.42 in dec.)
Re: Tach problems
I found the article, it's located in the electronics section, it's a simple fix.... Read it. I haven't tried it yet, I will very soon though.... It's between two pins on your tach board. I believe it's 4 and 10, it has pics if you don't understand. Clip 4&10 and solder an in series of @197k ohms from pins 4 to 10... Should fix prob... That's a brief, but read the article.
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#8
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Car: 1990 camaro rs
Engine: 5.0L 305 tbi
Transmission: 700r4
Axle/Gears: 2.73
Re: Tach problems
Yeah im more of a mechanical type, i can do basic wiring but whe it comes to that kind of stuff i dont even bother. If i had the right tools like a multimeter and sodering gun i could probley figure it out. But when i bought my car there was an autometer tach in the back seat so i'll just use that lol
#9
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Car: 91 rs
Engine: 350 tbi with EBL
Transmission: t56!
Axle/Gears: 2.733
Re: Tach problems
its very simple, solder between the two pins a resistor u can buy at radio shack. just look up the thread as this has been discussed and has very clear pictures tells u the pins and the resistor needed. its simpler than how it sounds believe me!
#10
Re: Tach problems
Do a forum search for tachometer fix. They have a thread on here with a full tutorial on fixing your tach. These guys posting above me have the right fix, but the thread goes into detail and has really helpful pictures to help you along. I used it to fix my tach that was off by several thousand rpms like yours.
#11
Re: Tach problems
I found the article, it's located in the electronics section, it's a simple fix.... Read it. I haven't tried it yet, I will very soon though.... It's between two pins on your tach board. I believe it's 4 and 10, it has pics if you don't understand. Clip 4&10 and solder an in series of @197k ohms from pins 4 to 10... Should fix prob... That's a brief, but read the article.
When I first started fixing it, my idle was at "1500" per the original tach and at 1500 (external meter) my tach showed 5000
If you want accuracy, buy an aftermarket tach
#12
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Car: 1989 camaro rs convertable
Engine: 305 tbi
Transmission: 700r4
Axle/Gears: 7.5"3.42 gears forth gen 2000 camar
Re: Tach problems
its a little harder on a 1989.the circuit board is fastened to the tach.i went ahead and ordered the capacitor that moreley?suggested and will try replacing that.it was only nine dollars with shipping.
#13
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Car: '82 Camaro Z28 (Former Pace car)
Engine: 85 5.7L Small Block
Transmission: WC T5
Axle/Gears: 96 disc LT1 3.23 Auburn 10 bolt.
Re: Tach problems
Excellent, i can finally have a decent working tachometer. I don't care if it's perfectly accurate. I just don't want a goofy racing tach.
And on a side note... Why is it that when people step into a thirdgen for the first time they think the tach is the speedometer... "Ohh it only goes up to 70?"
And on a side note... Why is it that when people step into a thirdgen for the first time they think the tach is the speedometer... "Ohh it only goes up to 70?"
#14
Re: Tach problems
There is now a replacement for the 1982-89 Chevy Camaro V8 Tachometer Circuit Board. Any body try this yet.
https://www.wc-autoparts.com/1982-89...t-replacement/
https://www.wc-autoparts.com/1982-89...t-replacement/
#15
On Probation
Re: Tach problems
Heres a thread on a guy who fixes them and/or sells the board cheaper.
https://www.thirdgen.org/forums/elec...-tach-fix.html
https://www.thirdgen.org/forums/elec...-tach-fix.html
#16
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Car: 1988 Camaro Sport Coupe
Engine: The All-Powerful 2.8l!! :P
Re: Tach problems
Excellent, i can finally have a decent working tachometer. I don't care if it's perfectly accurate. I just don't want a goofy racing tach.
And on a side note... Why is it that when people step into a thirdgen for the first time they think the tach is the speedometer... "Ohh it only goes up to 70?"
And on a side note... Why is it that when people step into a thirdgen for the first time they think the tach is the speedometer... "Ohh it only goes up to 70?"
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