Good evening.

This February I purchased a used 2010 F150 STX 4x4 4.6 litre with 210,000 miles. It had some issues and needed some love, and appears to need some more. I don't want to keep throwing money into, but am kinda stuck since my big self don't fit to well in my wife's hyundai accent.

I replaced the thermostat because the original one was stuck open. I replaced the steering shaft because the union was rusted out and had a dead spot in the steering. I heard the grinding of the partially engaging IWE and was able to determine the seals were bad (they would not hold vacuum). Before replacing the IWE's I repaced the purge valve, blue/white check valve and vacuum solenoid. I then replaced the IWEs and wheel hub assemblies. The grinding stopped, but then the next day the truck stalled on me at a stop light similar to what I've read online for others. The RPMs dropped and then a chime occurred and the oil lamp showed. I was able to restart and drive on with no CEL. The next time it occurred was after filling up with gas. The truck started then died. It kept stalling out. I could keep it running in neutral if I kept giving it gas. I made it home and a P0130 code was triggered. I erased the code and drove it some more with the same stalling behavior. I also noticed when going up a steep hill i'm hearing slight grinding again. I did order complete vacuum line replacement for the IWE's, so was thinking that putting that in might resolve the slight IWE egagement, but I don't understand why fixing the IWEs (vacuum leak) has now triggered the stalling. I don't mind replacing the O2 sensors if that's what the P0130/P0150 is pointing to.

Any help is greatly appreciated! I'm not a mechanic by any means, just trying to get by if possible.

Thanks!

 

There was a service bulletin that advised to have the vehicle computer updated to correct the false codes. Oxygen sensors were not the problem.
Not knowing if they were ever replaced previously and all those miles leaves a question.