The reason the throttle body needs to be cleaned is so you know you're getting an accurate TPS adjustment. That's all. Not the a TB cleaning isn't a good idea with each tune-up.

Since you're working hard on this, have you ever refreshed the trans connectors near the trans dipstick?
I've found some that were nasty inside and cleaning them helped restore proper shifting points on my wife's 88.

I'm curious sbout the TPS test results.


Cruiser’s Trans Plug Refreshing

Over near the trans dipstick tube are 2 rather large connectors. One is black and the other gray. These 2 connectors carry all the info between TPS, TCU, NSS, speed sensor, and trans solenoids.
Unplug each one, visually inspect for corrosion or bent pins, spray them out with electrical contact cleaner and plug them back in.
Revised 3-28-2012

 

OK-TPS Results are in:

Flat connector:
A-B = 4.89 V
C-B = 0.76

OHMS reading between B and -12V was 2 but wiggling the C101 could get to 0.9 so took that off and wiggled, probed, cleaned and can get close to 1 so there may have been an issue there.

Square connector:

A-D = 4.65
B-D = 3.81

Took off connectors by dispstick ground-These looked ok.
Changed air filter too as it was oil stained and dirty.

Taking out for drive now to see if it starts out ok.

 

TPS numbers look good. Do yourself a favor and CLEAN the connections at the dipstick tube stud anyway.

Did you do the sensor ground test as outlined in the TPS procedures?

 

have we checked vacuum around no 1 intake

 

Did the sensor ground test and got 2OHMS to start but wiggled and jiggled and could get 1 - 0.9.

I did the TPS measurements and then took the battery off as I had to fab a hold down strap for the safety and my battery wouldn't work with the weird squiggly OEM piece. So, I would say 30 minutes no battery. Started it up, backed out of driveway, started in D and same problem, revs too high and doesn't shift out of first. I drove like that for a few minutes to let it warm up. Stopped, started, throttle, no throttle, suddenly started to drive fine. Took down some really bad dirt road to shake it up a little to see if it's a bad ground issue. Worked fine-normal shifts. I was able to get up to 50 MPH with normal acceleration. When I floored it, I couldn't get it past about 45 MPH but if I eased up, it would accelerate as fast as I would want to go. I drove around at a variety of speeds, stopped to get milk and turned off engine. Restarted, drove off everything normal.

Does the TCU have to "learn" after a power-off? Does my throttle cable need adjustment if flooring won't kick down but will get up to speed with 3/4 accelerator. Maybe TPS is bad?

 

boy i missed a whole page of post just caught this ...lol...

 

TCU nor ECU relearn in a Renix Jeep.
I don't like the varying resistance in the sensor ground circuit.

Your TPS could test good with the throttle closed but have bad spots in it off idle.

 

No problem-Thanks for the reply-I was lucky it was an easy fix. Just took a while to rule out all the other gremlins that could have been the problem.