Update:

I think I found the problem. An intermittently defective TFP switch. When cold, switch D2 (N/C) is ok. I believe when hot it opens regardless of oil pressure on it. The PCM does not see an...

I'm doing log, so I check codes all the time. Never came a code...

I have a new lead. When the failure occurs there is a record of "Manual Pattern Requested" in log. A TFP switch failure is...

When failure occur trans temp was 155. After that, driving in 2nd, temperature increase I think was expected.

Does not seem to me. At the time of failure the temperature is normal. Even at the end of the route it is on the limit, but without codes. I'm also suspicious of the temperature, that's why I kept an...

no...

Friends,
Today I did a new 'test drive' which lasted about 30 minutes.
First I warmed up the engine.
I used the TunerPro log recorder.

Initial Conditions:
Engine Temperature: 176 degrees...

The transmittion stuck in 2nd and no change for 1st, 3rd or 4th. Truck moves with obvious limitations.

Thanks for sharing your experience. I believe our case is very similar. I have access to TunerPro and have some editing experience. I'm going to work on table 3-2 and see the result. I also have a...

Thanks Dave for your attention!
A second computer for the tranny seems expensive and a little complicated to me, but it's an idea to consider.

Friends,
I had my '95 4L60e broken and decided to use a '98 instead. In principle it works, but only then did I discover that the '7427 calibration $0D does not support the 3-2 ON-OFF solenoid.
Is...

I understand that the 'Minimum Temperature for BLM Update Enable' parameter refers to the engine (coolant) temperature. Either way, the problem continues even change to 20 C. The 'BLM Update Flag'...

Thanks Steveo for the information.
Analyzing the TurnerPro log I found that the BLM Update Flag is most of the time, Disable. I searched for BLM Update Parameters and found 'Minimum Temperature for...

I did conversion from carburator to TBI some time ago. It´s working almost fine but now I´m trying a fine tune.
The problem is the idle BLM.


As much as I try to adjust the VE table, the BLM...

Greetings! I'm 70 years old. Engineer, my professional life has always been linked to computers. In the last 20 years I have been dedicated to American cars. I have a Camaro 67 350SS and a Camaro...