Alright...tried the search button and nothing came up...

trying to wire in my window switch and can't f*%^ing find a wiring diagram that shows the tachometer signal...anyone know where it branches off????.....wire color????...anything usefel???

right now zex owns me....

 

bump as i need the same damn info. i saw a pinout of the pcm somewhere.
i also need to know which tps wire to hook up to on the TB.

https://www.cobaltss.net/resources/pcm/05cobalt20.htm

 

Go to the dealer and find which pinout on your ECM is a tach output.

 

Call Zex tech support. If they can't help, call Holley NOS tech line, they can tell you what wire is the tach signal. I installed a window switch on my dads truck and one of the example cars they listed was a 2.2 Ion.

 

i dont really wanna let the bag out of the cat as far as spray.
i kinda wanna plum my naws (via s/c spacer) at the same time i do my endplate cooling mod.

 

Do you mean the cat out of the bag?

 

yup, but i gotta say it my way. besides, itgets the pita's all in a bunch.

 

I think i finally found the answer...maybe.....who knows...

the tach signal is any wire NOT PINK or PINK/BLACK at any fuel injector...

 

Fair warning to those using the Zex window switch....Also, although I can't remember which wires it is exactly, I'll try to find the diagram that I have.

 

its actually in the nitrous section. thats where i had found it when i did mine. its in the harness that connects to the coil-on plug on top of the motor. don't quote me but its a pinkish wire with a white strip on it (its suppose to be brown i believe but because of heat and stuff it changes almost to pink). i will double check when i get home.


check post 42

https://www.cobaltss.net/forums/show...ht=tach&page=3

see what searching can do.

 

wouldnt the pcm pinoout....crank position sensor, pulse every revolution.???

 

for tach u can go to a injector find the wire that does not repeat on each injector and that your tach

 

like 60 times...