EMS 6860 firing order help. Do I use 1,6,3,4,2,5 or 1,5,3,6,2,4

[vangb2]

I give up. I've tryed that set up and the ISC will not open. I have used the butterfly screww to keep throttle open.

I thank you very much for you help.

 

[figgie]

Idle vacuum keeps on changing so I can't give you an accurate reading.

.

Stop right there.

If the car can not idle steadily by itself without the use of the IAC. You wil lnever ever get it to work. You need a good steady state idle with the IAC disconnected and closed. Once that is accomplished. Then you can insert the IAC into the equation.