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Posted: 10/22/2016 6:24:53 PM EDT
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.
Link Posted: 10/22/2016 6:39:58 PM EDT
4.2L , 4.6L , or 5.4L?
Link Posted: 10/22/2016 6:44:02 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By rayman70:
4.2L , 4.6L , or 5.4L?
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The 4.2 panty dropper
Link Posted: 10/22/2016 6:46:40 PM EDT
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.
Link Posted: 10/22/2016 6:52:38 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By rayman70:
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.
View Quote



I had excellent results with a can of MAF cleaner on my F150.
Link Posted: 10/22/2016 6:58:29 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By rayman70:
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.
View Quote



LISTEN TO THIS GUY!!!!!!


Do not replace the O2 sensors. PCV tube and intake gaskets were/are very common issues on these.
Link Posted: 10/22/2016 6:58:49 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By rayman70:
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.
View Quote


Lower intake as in intake gaskets?
Link Posted: 10/22/2016 7:00:08 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bgdtx:



LISTEN TO THIS GUY!!!!!!


Do not replace the O2 sensors. PCV tube and intake gaskets were/are very common issues on these.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bgdtx:
Originally Posted By rayman70:
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.



LISTEN TO THIS GUY!!!!!!


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


Makes sense looking at the voltages on all the o2 sensors they all seemed to cross check fine
Link Posted: 10/22/2016 7:00:23 PM EDT
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bgdtx:



LISTEN TO THIS GUY!!!!!!


Do not replace the O2 sensors. PCV tube and intake gaskets were/are very common issues on these.
View Quote View All Quotes
View All Quotes
Discussion ForumsJump to Quoted PostQuote History
Originally Posted By Bgdtx:
Originally Posted By rayman70:
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.



LISTEN TO THIS GUY!!!!!!


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


Makes sense looking at the voltages on all the o2 sensors they all seemed to cross check fine
Link Posted: 10/22/2016 8:05:08 PM EDT
190k miles is that makes a difference.

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