When driving it hard from a stop to about 70mph when the rpm's get to about
3000 or more the fuel system goes into open1 loop then when you back off the gas it goes back to closed loop. The fuel trims seem to be a little high on one side too I think, will have to watch some more and see if it's just bank two or both. Any ideas as to why it would do this, I don't think this is normal. From what I've read open1 means it's not getting readings from the sensors and is running on the pcm's default. I just had to put a reman by ford MAF on it has been running good since that install, except a little hiccup in the idle while cruising about 35mph this afternoon and the temp gauge dropped and went back up, was kinda spastic. Not sure if it's related. Engine temp reading on the scanner is steady and normal. Any ideas would be helpful. Chris-n-a-flakey-thunderchicken :confused:- posted
16 years ago