Will this tach work on my jeep?

adman02

Well-Known Member
Joined
May 15, 2009
Location
Durham, NC
Just picked up a factory tach out of a '91 wrangler.

I have a '79 CJ7 with a 4.0 out of '93 wrangler swapped in.

Will the '91 tach work with my '93 engine? If so, any advice on how to wire it up?
 
Last edited:
Yes, was the 91 a 4.2 or 4.0? Power, ground and tach input from ecm. I'll dig up schematics / wires. Assuming you kept fuel injection and ecm?
 
Well that sounds promising! The 91 was a HO 4.0 and I am running the FI and ECM on the 93 4.0. I'd appreciate any info you can offer.
 
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