i need some help like nowish. i did the isr mod like a week ago and now the engine is idling really really low and it is jumping around a lot. does anyone know where the idle screw is on these trucks, if it even has one, or anything i could do make things better.
thank you
andy

 

It's a flat head screw on the throttle body right by all the vac. hoses. I would imagine your problem lies with a poorly sealed IRS pipe. I'd recommend checking for leaks, i think thats where your problem is.