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Unread 04-23-2014, 10:44 AM   #1
foggybottombob
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1984 CJ7 
 
Join Date: May 2008
Location: Monument Colorado
Posts: 5,830
CJ7 tach wiring

Does anyone know if an original 84 CJ7 factory tachometer has any means of switching it from 6 cylinder compatible to 8 cylinder compatible.

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Unread 04-23-2014, 11:12 AM   #2
Mike Romain
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1986 CJ7 
 
Join Date: Nov 2007
Location: Off the Grid in Chester Grant, Nova Scotia, Canada
Posts: 13,580
Quote:
Originally Posted by foggybottombob View Post
Does anyone know if an original 84 CJ7 factory tachometer has any means of switching it from 6 cylinder compatible to 8 cylinder compatible.
No, they never came with V8's. But on a recent post, a gent insists it just works with his new V8. I would be tempted to just try it and see. It is wired inline with the ignition power.
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86/00 CJ7 Laredo, 33x9.5 BFG AT's, 'glass nose to tail in '00, 'New' frame,wires and plumbing in '09. Carter BBD Carbed 4.0 HO in '10.
89 YJ Renegade. BBD Carbed 4.0 HO. Locked front and rear with 33x9.5 BFG AT's
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Unread 04-23-2014, 01:45 PM   #3
foggybottombob
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1984 CJ7 
 
Join Date: May 2008
Location: Monument Colorado
Posts: 5,830
Mine is wired like the stock one was but the tach is not stable. It reads correctly for a while then it will jump up 500 or 600 rpm and bounce around that for a while. It's unstable and gives inconsistent readings. I guess I need to buy a new tach.
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