im playing with a afc neo and its working except the tach i cant see to find it the wire i splice in to can i use the cam pos sensor or the crank pos sensor becouse i cant seem to find the wire that tells rpm any help tonight if so. im playing with a 2.2 LS 5 speed

bump

ok so i found where to read it but its reads it in half so like 3000 is 1500 any help here please my goal is just a afc neo and a lm-c wide ban so i can data log and see if theres any tuning and how much with just these 2 if there just a little or a lot we will know how much.

 

if your device has a cylinder setting it needs to be set to 2 cyl to read correctly

 

ok it doesent mater if its 2 cyl or if it set to 4 cyl. it will only read the rpm,s if i blip the gas if i just hold it i have no rpms showing but if i blip the gas right before i let off it will read but just a sec. and the rpms are right with the factory tach in the dash. any ideas here would be ok. im going to try to tune the car for just a exhaust system and a cai.

 

wat? if you tap into the tan wire on the ICM plug and set it to 2 cyl mode it will read correctly. I have done this on both my raptor shift light and my zex window switch and they both read perfect.

 

ok ill try this but wait i dont have a tan wire. i have a black, orange, pink/wh,brown/wh and a solid white those are what i have. what is the name of the tan wire is it the cam pos sensor, or is it the ign control timing control 1-or 2

well any one there

 

yes you do, its on the ICM plug...pull back the tape and look at it.

 

acording to the service manual it brown but if thats it ill try it and thanks for the help

 

like i said this is a 2.2 cobalt not a ion but the wire i needed to use is brown with a white stripe not tan like ion's use. it works now i had to set the afc neo to a 1 cylinder engine to get a true rpm match other wise it would only see half the rpms. 3000- looks like 1500 if its set to 2,4,6,8 cylinders. now its working but im not changing any settings in till the wide ban is hooked up. thats tonights project. so far it run constant a/f of 86.2-86.6 no mater what rpm and the type of load thats on the engine. right now im data loging my stock info. ow yea thanks for the help ionninja.

 

it shouldn't matter whether its an Ion or Cobalt, its the same thing (unless something was changed in 06 but I don't know about that)

lil_kano was able to get his setup exactly like mine
https://www.cobaltss.net/forums/2-2l-l61-performance-tech-45/need-help-finding-tach-wire-43326/

but whatever, u got it working so thats all that matters...good luck.