To start-Did you let the Bronco heat up to normal operating temperature? And when it comes to the part for Wide Open Throttle, did floor it all the way? Run the test a couple times and see whats consistent.

 

Yep i had just got done driving. Turned it off and then did the test. I did hit the gas pedal too when the code "10" popped up after the cylinder read, at least thats what the book on mine said to do. I will go out and re-run the test a second and third time tho. Thanks for the quick response!

 

1992 f150 5.0L

I went and ran a KOER test and it gave me back the codes 129, 167, 225, 536, 632.

129-insufficient MAF change. ok... no MAF equipped in this truck
167-TPS fault during test.
225-Knock sensor fault
536-BOO circuit- i forgot to hit brake...
632-Overdrive switch -forgot to switch off...

My question is, how do i go about fixing the 129,167,225 codes?

Your 1992 5.0L came with a Speed Density PCM and you now have a MAF PCM. Note the 3 Digit Codes.

Are you sure that there is no MAF Sensor? Or was a new PCM installed without it? To be sure, what is the Programming Code of your existing PCM?

Am I wrong on this?

 

FIXED! i must have not floored it enough... thanks again for respondin quick tho.

 

Yea, it will give you false codes if you don't floor it enough.

 

I have another off this topic question. Seattle FSB, are you saying that my PCM is not original?

 

No Drew. I was thinking there is a difference between 2 digit and 3 digit codes, but after searching the net for a while now, I am not sure what the difference is. Maybe no difference.

My old OBD-I Speed Density PCM always gave me 2 digit codes. I was initially thinking OBD-I MAF gave 3 digit codes. I am now thinking this may not necessarily be true.

Maybe someone knows? :scratchhe

 

My 1992 OBD-I SD F350 spits out 3 digit codes. Ford started transitioning to 3 digit around 1991/92 IIRC.

 

What's an f150? :scratchhe

 

It's a bronco that doesn't have a pretty dress on it. Just kidding, i'd take a bronco over my f150 any day. I pretend its one when i put the shell on it....

 

Right ON RLA!
2 Digit to 3 Digit "...Ford went from two-digit to three-digit EEC IV Self-Test codes in 1991 to service the increasing number of service codes required to support various government On-Board Diagnostic (OBD) regulations. The phase-in from two-digit to three-digit codes started in the 1991 model year. 1996 Broncos have OBD II that has 3-4 numbers beginning with a Letter; usually a P