Quote Originally Posted by airdeano View Post
MAF has a direct effect on shifting. your shifting problem is light throttle
or just WOT throttle?
check to verify the wiring to the MAF is not damaged.. did you get a MIL
when it was unplugged? or have you always had a MIL on?
DTC 101-102-103 are MAF codes plus you should have had some IAT DTC.
the MAF also contains the IAT (intake air temperature sensor) unplugged
the computer thinks its -40° intake air... fuels and timing accordingly
seeing as your disconnected the cables (incorrectly) you now probably
need a transmission relearn as well as a full system relearn.
try this procedure...
disconnect the negative cable (only) lead from battery
disconnect any and all cell phones from the cig lighter jacks
press the horn and brake pedal for one-minute or longer.
reconnect the negative battery lead to battery.
youll need appox 200mi to relearn all the adaptive learning sequences

airdeano
This is good info, My truck always ran better when it was warming up. So now I see why I was told to disconnect the maf. fool it into thinking it was cold only its humid 100. Thats a few pieces of the puzzel.
I got no MIL or codes at that time nor have i since. I did get a chance to speek with Allen ( what a great dude ! ) and there is no way of knowing what was turned off in that tune so Mil or Mil means nothing without knowing.
Shifting problem is at any throttle I must back off the gas the for the trans to upshift. but 30% throttle(guess) at any speed down shifts trany to first and reves the motor like your foot is in the radiator. BAMM that fast bounce of the rev limiter. That's scary since the rear wheels are connected to the phsyco drive train.

I cleaned the Maf yesterday no change the Poss cable off all night- not been out to check yet, but from what this post says, That is incorrect so I haven't been in a hurry to find out it didn't work,

The relearn proceedures (that take 200 mins) is there a link or site that I can go to to study them, then I can learn all the adaptive learning sequences. I did a search but not to much luck, Lots of info On CASE learn but i dont know if that is just v-6??

My truck is a conversion trans plant so if the horn and brake have some thing to do with BCM and other electronic wizardry I dont have it. May be its so you take a ONE FULL MINUTE sitting in your broken truck to realize how much you appreciated it when it was running, well that will work. With the propper cable removed of course.

Thanks to all