Where to start........... I just installed a different valve body in my truck. There should not be any problems with that, other than the fact that I am a meathead and could not get the kick down cable adjusted. That is now all fine.

I have been trying everything possible to get my TPS working properly. I have taken it apart, cleaned it, checked the voltages, and re-wired it outside of the factory wiring harness. Now this is where things get interesting. First I re-wired the orange/blue wire from the TPS with no change. After driving with my truck hunting/flaring/slipping shifts I then re wired the purple/white wire from the TPS. I tapped into these on the bundle of wires that goes to the PCM closest to the engine. Little did I know that there are more than 1 p/w and o/b wires going to the PCM. After doing this, I now notice that tach does not work and that now my alternator is not charging. That leads me to the crank position sensor. Are these 2 somehow related? The transmission seems to be in 3rd gear limp mode now. I can manually upshift, and select gears that way, but my OD does not work. I have been searching the archives for hours on kick down adjustments, tps, cps, alternators and every other issue I seem to be having. Where do I start? I need help. Bad.


And for the first time in 5+ years that I have had my truck my FSM is not with me. I can' t find a cps anywhere at a dealership. Already bought a TPS and have not installed it. That also irks me, bought it from NAPA for $250 clams, and you can see right on top where it had been taken apart just like mine and epoxied back together. Reman from NAPA Has anyone ever had all kinds of problems from an eratic alternator? All these problems seem way to fishy to me. On a side note, I cleaned up all the ground connections on the battery added a 10g wire from the battery right to the PCM. Right now the tranny is acting OK. I manually upshift from 1-3 and there is no hunting, flaring, upshifting, downshifting and everything inbetween. No OD though.

Ever since my tach and alternator have stopped working, my tranny has been giving me much less greif. What do you all figure? Oh and to make matters worse, I need my truck for work ( I get paid to use my truck) on tuesday and it seems like there is screw all around for a cps and alternator in town. Parts are hard to come by!

 

John, did you check all your fuses?? and the heavy breaker type fuses in the engine compartment? If you were working on anything electrical without disconnecting the batteries you may have blown a fuse/breaker. Just a thought as I have done that on occasion and it can cause all kinds of confusion.

 

I am almost positive your problem is in the CPS, check the wiring out of that sensor closely.

 

Thanks.

Just the wiring, and not the actual cps. I will do a little more diggin tommorow. A fuse is nice and easy for me to check to!

 

Hi Swampy, illflem here. If I'm reading what you did right the problem is simple, there is a splice into the purple with white trace tps wire with another from the cps inside the wiring harness on the firewall that you basically disconnected when you cut the tps wire at each end (if that's what you in fact did).
In other words there are two pur/wht wires in the loom but only one at the pcm end. You need to hook it back up to the pcm.

Another problem that may be related to no lock up is a bad or going bad trans temp sensor. Just disconnect the wire from the tranny and jump across it with a 1k ohm resistor and see if things work right.

Don't feel bad about buying the new tps. Even after replacing the wiring on mine with shielded wire I still had the hunting problem until the tps was replaced.

 

illflem,

You are correct. I left the purple/white wire just chopped up. I will splice back into it and things should be all better. Life is good now. It has been a week from hell, trying to get 4 or 5 different problems solved at once!

 

I just did the rerouting of the tps wires and I agree, the purple is spliced up by the firwall. Re-conect it the way it was and it should straighten things out. Good luck, Kevin

 

The purple wire is once again connected and everything works as it should now. What a nice feeling to put my truck in D and drive away without it hunting bucking jumping and being a general pain in the rear! All it cost me was 1 TPS still never used, and a kickdown cable. Did not need either, but I was getting paranoid, because I was going to buy a new alternator and cps! I need my truck for work on Tuesday at all costs! I am still going to go to an automotive electrical expert and let him check out my batteries and alternator. Bill K was telling me that sometimes alot of the electrical problems are from a messed up alternator.

THANKS!!!!!!!!!!!!!

 

Well..... just got back from another short test drive. It is still being and ignorant pig. I think I will put in the different TPS, and if that doesn't fix it I will hook up my mystery switch again. I wish I could take everything electrical with my tranny and smash it into 10000 pieces with a 10lb sledge hammer.

 

I had the TPS problems, tried cleaning it, didn't hear about isolating the wires until I bought one from Napa, but it cleared it right up.

 

I would like to thank everyone for their help and tips. I tried alot of them and made about 10 calls to Bill K. For the last 5 days I had one heck of a battle with my tranny and it won. I took it to the dealership. It is not all bad, I talked with the tech that will be working on my truck for quite some time and feel confident that he can help me out. Even said he wants to talk with Bill. Gives me a little bit of a warm fuzzy feeling!

A donkey can only do so much lying on his back with big eskimo mittens on his hooves in -20 c temps with a wind. First time in the last 5 1/2 years that I have had my truck, it has left me walking. Kinda bad since I just got a contract 3 months ago to use my truck for work. All is not lost, my Mom's Dakota is pinch hitting for the old goat.

I'll be back in 3 weeks......... that is when I get out of the bushes from work. Probably should stay in there a month, paying dealership rates......

 

Sorry your truck has won. Just goes to show that it has a little attitude. Hopefully it's a not so painful of a fix. Yes, I remember the days of popping in a new clutch while laying in the snow. So cold the wrench sticks to your hands, then I would have to walk to the parts store barefoot in the snow, up hill both ways . Good luck, please let us know what it turns out to be. Kevin