Just a few questions about the holley pro-jection 4D unit. How adjustable is this unit?...I know there is 6-8 ***** on the front of the ecm but would I be able to hook up a lap-top with holley software to see what this thing is doing? Because the idle is weird...sometimes 600rpm...then sometimes when ya tap the gas it stays around 2000rpm and the car has a stumble off idle up to around 3000rpm. The book says the red LED will turn on 10 seconds after starting, then once the o2 sensor warms up and the computer goes into open-loop the light will blink...this red led stays on continuous...would this be a faulty O2 sensor? The pro-jection is 900cfm and sits on a pre-86 355 with a 150hp shot of Nitrous through a plate system, runs real strong except for the idling and stumble problem. Any info on theis unit would be greatly appreciated as I have never dealt with this type of injection, Thanks.

-Brian

 

Have you called the Holley tech line? I think that would be your best bet. Just call them and tell them what is going on. I've found that they are very helpful. Also, I think that they have an e-mail address.