tach problem

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Oct 6, 2005 | 10:22 PM

TravisZ28MAXX

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Junior Member

Joined: May 2002

Posts: 70

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From: NE florida

Car: 1992 Z28 and 1988 IROC-Z

Engine: both L98s one with SD and one with MAF

Transmission: both 700R4s

tach problem

my 88 irocz has a problem with the tach at idle it shows about 1500-2000 rpm. when the motor is over probably 1500 rpm the tach is pegged all the way over. any ideas? I think there is a switch or something on the back of the guage to set it to 4, 6, or 8 cylinder engine. anyone else have this problem?

Oct 8, 2005 | 08:48 AM

Vader

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Joined: Jan 2000

Posts: 19,655

Likes: 309

Is this a stock tachometer? If so, I doubt there is a "4-6-8" switch on the rear.

Oct 8, 2005 | 08:07 PM

pilgrim

Junior Member

Joined: Feb 2005

Posts: 22

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From: Fort Collins, Colorado

Car: Various.......

Engine: 305 TBI

Transmission: Auto

There are two threads that will interest you...
https://www.thirdgen.org/techbb2/sho...hreadid=114057

and

https://www.thirdgen.org/techbb2/sho...hreadid=116526

The second contains a link to the first. I have ordered the .0033 cap referenced in the first thread and will install it in my 91 RS in the next couple of weeks. I'm not sure whether it will sovle the problem or not.