Rough Idle and stumble under low load
Hey all, I have a 97 with a 4.6 PI motor. It is idling pretty rough and sometimes when under a light load it will stumble and seem to want to stall out. I was recently in a drive through and the car died when I tried to turn the wheel at rest. I just changed the plugs and wires, coil packs are about 3 years old, I cant find any vacuum leaks, maf is clean, IAC is new , all O2s are new, and fuel pump is relatively new. I have an xcal2 and datalogged my fuel trims and there aren't any instances where the adjustment is over 10%. Also just tested compression and the highest was about 148, lowest about 141 and there were no oil fouled or fuel fouled plugs. I'm pulling my hair out here trying to figure it out. If there is something else I should be datalogging let me know and I'll do it, that area just isn't my forte.
Thanks for reading my book, please help.
I love my V8, but I'd love it more if all 8 cylinders worked.
(they do now)
My T-bird is like George Jetson's wife, you try to give her a little money, she takes the whole wallet.