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Very weird problem

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I have a 02 2500 4x4 auto with edge drag box, about 2 month ago or so ( I dont drive my truck much in the summer ) it threw a p0236 and p0237 I reset the codes and waited to see if they woudl come back but they didn't the odd thing is that the truck still acts the same at about 37mph and up till 43mph I get very very bad hesitation if I am not on the skinny pedal hard it almost feels like it wont shift into OD but its not really a trans problem ( thats what I think ) the edge off or unplugged same issue happens should I just buy a boost pressure sensor and change it or can it be cleaned re installed ? if thats the problem at all and I have p1693 code when cycling the key three times thanks for the help

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I had some injection pump problems and was told to remove it all,then test it.

In fact i had to send my edge comp box back.They fixed it free.

--- Update to the previous post...

I think Mopar hit the nail on post #9.

  • 2 weeks later...
  • Author

Ok a little update on whats going on now Edge box is out to Edge they will check it out and update it if needed FREE truck drives like crap so I stopped driving it till I get the box back and a word from Edge on the box if it comes back and problem still the same new sensor will be installed

  • 4 weeks later...
  • Author

So I got the sensor changed and I still have the same problem with no codes now and both P's are done and clear :cry:It feels like a clutch kick in a manual truck only around 40-43 miles per hour and right before overdrive kicks in transmission does not throw codes ?

  • Owner

Hmmm.. The only thing I can think off is the alternator is got a bad diode feeding AC wave form into the PCM causing this weird issue. Or the APPS sensor is bad in a spot causing a weird value fed to the PCM.

the APPS stands ACCELERATOR PEDAL POSITION SENSOR. it is similar to a TPS or THROTTLE POSITION SENSOR

  • Author

the APPS stands ACCELERATOR PEDAL POSITION SENSOR. it is similar to a TPS or THROTTLE POSITION SENSOR

Thanks for clearing that up So I should just change it and call it a day ? they dont show codes when they go bad ? :(
  • Owner

Typically they always show a code when there bad... P0121, P0122, or P0123... That's why I suggested checking the alternator too... Because the alter AC noise will cause this too... Bad grounds on the passenger side battery...

  • Author

Typically they always show a code when there bad... P0121, P0122, or P0123... That's why I suggested checking the alternator too... Because the alter AC noise will cause this too... Bad grounds on the passenger side battery...

you know what now that you said that this morning the truck didn't wanna start till I jumped it from the wife's truck I didn't pay much attention because the batteries is still under warranty and the Zone will replace both once I get a chance to pull them out I will have them check the alternator as well while I am at it
  • Owner

Ahh... We hit a nerve there... So if you needing to jump start and the battery condition is poor I going to bet money you got a issues somewhere in the charging system...

  • Author

Ok I had the alternator checked came back good but I have two bad batteries they are gonna be changed tomorrow I already got two sitting on the floor inside the truck.

  • Owner

Ok I had the alternator checked came back good but I have two bad batteries they are gonna be changed tomorrow I already got two sitting on the floor inside the truck.

Did the diodes check out good too? :shrug:

  • Author

Did the diodes check out good too? :shrug:

yep diode good alternator putting out what it should put out, I had it checked by an alternator and starter rebuild shop by me here I came across something a couple of years back on the dodge diesel forums about wiring in the same harness that run on the firewall interfering with trans signal ? someone opened up the harness and shielded some wires with tape ? :shrug::spend: :spend: :cry:

yep diode good alternator putting out what it should put out, I had it checked by an alternator and starter rebuild shop by me here I came across something a couple of years back on the dodge diesel forums about wiring in the same harness that run on the firewall interfering with trans signal ? someone opened up the harness and shielded some wires with tape ? :shrug::spend: :spend: :cry:

Haven';t heard of that one. Have heard of "noise" comming from the alternator impacting shift points and tranny - so tape there. I'm kinda confused where your at ? So you replaced MAP as well as edge harness and you now get no boost codes ..... but you still get a large dump of smoke and hesitation at around 40 mph ?? :shrug:
  • Author

Haven';t heard of that one. Have heard of "noise" comming from the alternator impacting shift points and tranny - so tape there. I'm kinda confused where your at ? So you replaced MAP as well as edge harness and you now get no boost codes ..... but you still get a large dump of smoke and hesitation at around 40 mph ?? :shrug:

to sum what I am getting its a clutch kick feel at 40mph only if the skinny pedal is at maybe 1/4 or at most 1/3 more and it wont feel like a clutch kick it just shifts in OD with no problem I am going to the trans shop next :spend::spend: Remind me next dodge I buy must be a standard shift :thumbup2:

are the cables ..like cruise control and t.v. cable freed up?not binding up..t.v. cable adjusted properly?maybe put a little 3 in 1 oil on the cables that are underneath the black housing where the apps is located.:thumbup2:

--- Update to the previous post...

i have an edge juice w/att on my '01 and it came with that adapter for the '02's.............i dont need it if someone needs it..just sitting in a baggie.:thumbup2:

  • Author

the harness came off the truck completely and now new harness is in place.

  • Owner

Explain the diode thing for JohnFak... What happen is a diaode in the alternator will fail and short. Then when the vehicle is running you'll have a hopping AC waveform on the DC +12V signal now the freqency will change with RPM's so now at the point of 40-50 MPH the frequency drives the PCM nuts and causes this weird TQ converter lock/unlock. Then as the RPM increase more the frequency gets so high is just smooth and the PCM can't see it no longer... This is why the tin foil the alternator lead and noise filters on the APPS line are installed normally because a diode in the alternator failed... I look at it this way the truck ran normally without aids of wiring changes for many year and now a problem with lock up occurs... Adding a wiring mod or filters isn't the answer but finding the actual cause is...

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    • Like 1
    • Author

    So I changed both my batteries last night and guess what ? :lmao: no more weird problem its just gone went away nada zilt I tried so hard to get the truck to do it again and its just not happening :thumbup2:

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