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hookin up a tach

H

haynesn12

NAXJA Forum User
Location
orono,me
i put a tach in my mj today and hooked it up to the green/white wire off the coil. the tach works and i get a reading but the rpm's seem low. is it possible i hooked into the wrong negative wire on the coil? any ideas?
 
Many electronic tachs have a switch on the inside to select the number of cylinders your engine has. Make sure it's set correctly.
,Ron
 
I second what Zuki-Ron wrote
 
haynesn12 said:
i put a tach in my mj today and hooked it up to the green/white wire off the coil. the tach works and i get a reading but the rpm's seem low. is it possible i hooked into the wrong negative wire on the coil? any ideas?
Click to expand...
GRN/WHT should be the correct wire.

What tach/model, etc.. ??
 
well maybe i am just not used to the way the engine tachs maybe if someone could tell me like where there's tachs at like 25 in 2nd, and differant speeds in diff gears. that might help
 
if you have a older cherokee w/o a tach you could just go the wrekers and find a cluster from a simmiler year and just plug it in everything will work the same as well as the tach.
 
My 91 XJ idles between 900-1000 rpm 1500 at 45 mph and 2100 at 75 mph with 235/75/15 tires.

Hope this helps

73's KG4BET
 
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