I bought a Stewart Warner shift light. I got the power and ground hooked up just fine. The problem I am having is with the green wire that needs to be connected to the coil negative. I hooked it up to the brown and white wire that was suggested in the other thread, it worked but the rpm's didn't match. Also, it requires that the PPR (pulses per revolutions) need to be set. Does anyone have any idea what the PPR for a Cobalt SS-SC would be? Any info would be greatly appreciated.

 

No matter what I hook it up to, it is off by half across the rpm range.

 

Your ignition system is COP, coil on plug. You will need to set the cyl. scale to 1.

 

yes if it has a one cylinder setting then you will be fine. If it doesnt it will not work with the COP. if you can't get it to work go to raptorperformance.com and order one from them.

 

ok the instructions say to hook the green wire to the coil negative or the tachometer terminal so where would the tach terminal be?

 

there isnt one since your car is coil over plug. we run a distributorless ignition system. the only way the light will work is if it has a one cylinder setting since each plug is its own seperate entity. if you have nemore questions send me a pm i will be more than willing to help u.

 

The ppr needs to be set at .5 If you have part# 114906 you will have to send it back. You need part # 114926 because the first one only goes to .1. The second part # witch is more expensive goes to .5. There is a other Sterwart warner gauges that go to .5 I just don't know there part #. I do know that the 114926 goes to .5 because thats the one I have.
Joe

 

i thought that was the problem thanks for the info guys i will take it back and get the one that goes to .5-ppr

 

If your tac doens't have a single cylinder setting your going to need a tach adapter.


MSD tach driver

 

i looked into it and just took the shift light back i am going to get another one tomarow