So, I have been using his whip since I sold my truck and he has a few cel codes that I want to fix for him.

I have
P1120
P0122
P1121
P1740
P0171
P0174

So, it looks like I either have a bad TPS, bad MAF sensor or a leak between the two

The TCC lock up solenoid is out or there's a break in the wire

and the o2 sensors are both bad.

Does that about sum it up?

I plugged in the apple toque app and plugged in a new TPS, the old one and the new one both read the same % which is 8% at idle. The odd thing is that the TPS isn't perfectly at 0 when at idle, 4% it reads when off the throttle body and 8% when it's on. It idles fine and not too high at those readings.

The TPS looks to have been changed already, so I am going to assume the MAF is bad, which would also explain the extended time it takes to start.

4.2L , 4.6L , or 5.4L?

The 4.2 panty dropper

Check pcv hose elbow real well, but the 4.2 can get vacuum leaks at the lower intake as well.
I would start there first before changing the MAF sensor.

I had excellent results with a can of MAF cleaner on my F150.

LISTEN TO THIS GUY!!!!!!


Do not replace the O2 sensors. PCV tube and intake gaskets were/are very common issues on these.

Lower intake as in intake gaskets?

Makes sense looking at the voltages on all the o2 sensors they all seemed to cross check fine

Makes sense looking at the voltages on all the o2 sensors they all seemed to cross check fine

190k miles is that makes a difference.

So, I'll start looking for leaks on the intake and the PCV hoses etc?