Idle issue HELP!!!!
#1
Idle issue HELP!!!!
Ok so I have a 2004 fx4 with the 5.4. I have 92k miles and just replaced spark plugs and two coils. I also just flushed the radiator fluid. My engine used to idle at 500 Rpms while in drive at a stop. It now recently (after coolant flush) started idling weird. When I come to a stop and sit at a light, it will go down to 300rpms or so and the go back to just under 500rpms. I have no misfires and it drives fine when not at stop in gear. I'm getting 16.3 mpg with mixed driving. It is bone stock and I cannot figure this out. Had the tps checked and it said it was within range. The alternator is not making noise and within range. Is there a coolant temp sensor on these trucks? Because it threw an emissions code that said catalyst below threshold at 195 degrees but I was told by a mechanic that it was air pockets in the cooling system that threw it. I had the code shut off and the light hasn't come back on. I'm so frustrated about this because it is a great truck and has not given me probs until now. Anyone?
#4
#5
Will air in the cooling system affect your idle? I think the air should be out by now. We bled it over night and I drove it for 3 days so that my over flow tank would take care of the air. I have hot air and my temp is where it always is.
#7
Ok we'll hopefully that will help it. I have been running 93 octane and my exhaust smells like fuel but I could be overthinking it because I'm trying to find things. I have also heard that the gm trucks had this and there was a recalibration they had to download to the ecm. Do they have these for fords?