MGBRaceman

I have a friend with a B13 Sentra SR20DE, and his tach is reading approximately 1000 RPMs higher than normal at all RPMs. Has anyone run into this issue before. Perhaps a faulty sending unit, or does it read directly from coil charge or ignition module. Perhaps a faulty tach? If anyone has any thoughts, please post. Thanks.

Jesus

did he mess with the tach at all? If so that chould be the problem

SR20DEboi

I have not messed with the tach at all. With my old engine that blew it was acting up about 500 miles before the engine blew... Now with my new sr20 its still having the same problems... No clue why PLease help me so I dont have to spend the money on a new tachometer.

SOHKis

is it autometer? you got the right wires cut on the back of it for 4/6/8cyl motors?

Jesus

is it hunting up and down?

SR20DEboi

Yea it is hunting up and down

sassigrits

We're talking about a stock tach here, and how in the hell did you blow an SR?

projsr20det

The tach reference comes from the negative side of the coil (blk\grn IIRC). Is the engine rpm actually hunting or is it just the tach?

Sidenote: The stock tachs are usually off by about 150-200 rpm and gets worse the higher it goes. Also, what was the cause of your motor blowing?