Since this started I have changed the in line fuel filter, plugs, plug wires, dist cap, dist rotor, PCV valve, EGR valve, IAC valve, gas cap, MAF sensor. Removed and cleaned the throttle body.
I checked and had a technician check the vacuum lines, engine and chassis grounds, fuel pump pressure was 50 psi, tech hooked up a scan tool, no codes and parameters all looked normal to him.
Put Lucas tune up in a bottle (x3), 75 gallon tank, and a full tank of premium gas and drove it 400 miles, still doing it.
Of note, the tech pulled the plug off the engine coolant temp sensor and the idle smoothed out, not perfect and took longer to stall, he also sprayed either carb cleaner or something similar into the air intake box with the engine running and the idle would momentarily smooth out.
I understand that pulling the plug on the coolant temp sensor makes the computer give more fuel just like me manually giving it a little gas thus making it idle better.
have the same problem?
Thursday, July 17th, 2014 AT 2:25 PM