Only occasionally does this happen: I will be sitting at a light in drive, and the tach will start bouncing around, but the engine stays the same speed. It stops if you put it in neutral, and sometimes it will start again when you put it in gear. Any ideas what causes this? Also I need a detailed explanation about adjusting the TV cable, if anyone gets some time.....
Vman

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1989 Camaro RS
2.8 V6
K&N's
700R4 tranny
Cragar Street Pro rims (old Series 30)
Pioneer DEH-P3000

1969 Camaro SC
350 HO from a Vette
Turbo 350 tranny
In the process of being restored

 

Factory tach or aftermarket?

The detailed explaination of adjusting the TV cable was given in the message titled "Tom P, Brian K, Graeme's, etc".


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards

 

Factory tach

Got the TV cable thing now, all I have to do is get out of school to do it!
Thanks again
Vman

------------------
1989 Camaro RS
2.8 V6
K&N's
700R4 tranny
Cragar Street Pro rims (old Series 30)
Pioneer DEH-P3000

1969 Camaro SC
350 HO from a Vette
Turbo 350 tranny
In the process of being restored

 

Ouch, factory I don't know. I didn't get a factory tach Did you try this message in the "General Engine" forum? I know I've read of this problem before, I just never paid attention


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-Tom P (Hot rodded 1986 Firebird 2.8l) from http://www.f-body.net/mailbag/3rd/3rd_mailbag.html message boards

 

Mine ALWAYS does that. Does it do it more when your turn signal is on??

Mine goes to the beat of the blinker

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Jason E
'89 Camaro RS 2.8
Grey/AT/T-tops/all power
Hypertech chip/2 K&N filters/Accel cap/rotor/8.8 wires
Eclipse CD and 100x4 amp/Boston 746 4x6 plates and RX 6x9 3 ways/ALL Monster's goodies
Alpine Alarm w/ Keyless entry
IROC tailights/t-windows

 

The first thing you should do is check the electrical connections at your ignition coil for the tach bouncing. I know it's an extreme, but while I was doing my tune up, I ended up breaking a lot of the housing of the coil connectors off because I didn't know how they were clipped on. So I let it be, but soon they started to come loose really easily and as they did, the tach would start jumping around from 2K to 5500 etc.... Then eventually the tach would die altogether and soon after that, the car would die. But as soon as I tightened up the connection again, all was well. So now I have bought some new connectors and have had no problems since.

 

Jason - mine used to, along with the batt gauge - but I got a wire to the ECM that was grounding out fixed and that cured it. Fixed a hell of a lot of other problems to.
But no, mine doesn't do it anymore.
Vman

------------------
1989 Camaro RS
2.8 V6
K&N's
700R4 tranny
Cragar Street Pro rims (old Series 30)
Pioneer DEH-P3000

1969 Camaro SC
350 HO from a Vette
Turbo 350 tranny
In the process of being restored

 

A wire to the ECM grounding out??? Damn, thats all it might be?!?!?! Nice!! Yeah, my voltmeter's been dancing since, I dunno, 1994 maybe?? Thanks for the tip!!

 

what wire is that? was it grounding out to the body? because i have a serious charging problem and i think it might be related to what your talking about

where was it grounding out

 

Dude why are you replying to this post?? It's 4 years old. Half of those guys aren't even here anymore.

 

dude...i was searching for an answer just like everyone on this board yells at everyone else to do. i didnt know it was that old and i didnt know they werent around anymore, sorry i dont keep up with the times. if you didnt have any constructive advise to offer keep it down cuz its not helping me find my answer

 

Check the lower left corner of the last post on any thread. That'll tell you when the last post was made to that thread.

 

Searching is good. Replying to searched posts is almost always pointless. Last time you did this ( https://www.thirdgen.org/techbb2/sho...threadid=74423 ) I specifically asked that if you're going to bring posts back from the dead, acknowledge that you're doing it. Cali's right, most of these people aren't active members anymore. Searching is used 99% of the time for looking up previous info, not continuing conversations. Starting new threads would rattle alot less nerves.

 

I agree it HAS to be electrical failure/jumping SOMEWHERE. Mine does it if the battery cables get loose.