Hello, I have a 1999 Regal 2850 with a Volvo 7.4 Gi PEFS thats runnning rough and surging at idle. Rev it over 1000rpms and it runs perfect. So I've been working on this for weeks now and I'm loosing my mind. I'll give you a run down of what I've done so far. New IAC, MAP, coolant sensor, Fuel...
