Tachometer problem

[Smatt90IS]

oaky i did a search and could not find the same problem every thing in my car works perfect execpt the tachometer i just had and electrical problem in my car i jumped the wrong pins i got that fixed to day :) all my fuses are good. The only thing i can think of is that i removed the speed sensor off the front of the engine and maybe i put it on wrong but i doubt it
if you have ANY suggestions about getting the tach to work LMK it worked perfect before the pin incident the car runs like a bat out of hell if that makes a difference
are there any relays that go to the tach
I never took the cluster out BTW

[ZM Blue Devil]

si board?

[Smatt90IS]

maybe does that just die because it worked before the short? every thing else works ecept the econ and tach? ill check it out i apreciate the input

[Jean]

"i jumped the wrong pins i got that fixed to day all my fuses are good. The only thing i can think of is that i removed the speed sensor off the front of the engine and maybe i put it on wrong but i doubt it "


What pins did you jumper exactly? Speed sensor is in the diff at the back of the car. What did you remove?

[iX-treame]

"i jumped the wrong pins i got that fixed to day all my fuses are good. The only thing i can think of is that i removed the speed sensor off the front of the engine and maybe i put it on wrong but i doubt it "


What pins did you jumper exactly? Speed sensor is in the diff at the back of the car. What did you remove?

It was the crank postion/speed sensor. And it was pins 19 & 17.

[nando]

there are no sensors in the engine bay that send a signal to the tach - at least not directly. if something in there wasn't hooked up your engine wouldn't run. the tach signal comes from the ECU.

[iX-treame]

there are no sensors in the engine bay that send a signal to the tach - at least not directly. if something in there wasn't hooked up your engine wouldn't run. the tach signal comes from the ECU.

Yea we ran a few different ECUs, maybe it's the SI board.

[Smatt90IS]

im going to try a differnt cluster soon

[325islovE]

any updates my car is doing the same thing

[clavinZERO]

is fuse #21 blown?

[bmws50b30]

si board?

this! i have the exact same problem. everything works except for the tach. sometimes it would work and then just die while driving. i replaced the SI board and it now works.

i guess it drained my battery quick since i never reset my service lights, it was always on.