Recent content by TJBaker57

The oil pressure SWITCH threads are M16 x 2

Well allow me to rephrase... MY Tech 2 on MY 2002 4.2 does not display "oil pressure". I have tested a few oil pressure switches from the 4.2. They are a basic ON/OFF (open/closed) device. They are normally closed and they open at approximately 4 psi. This is all that any typical...

No scantool can read oil pressure for the 6 cylinder 4.2 engine as there is no sensor that can read that. Query: What was the engine temperature when this warning came and what was the engine rpm?

My recirc has been broken for more than 10 years. I don't consider it worth repairing. However, I live in a very dry climate and get as low 32° F out of my A/C system.

Are you aware of what the recirc actually does?? The sole action of the recirc is to allow air from outside the vehicle to be drawn in or not. It has absolutely zippety-do-dah to do with where the air blows out.

Correct. The inline fuse I mentioned was only for the sake of of explaining the issue I had with the TransAm. And how a bad connection can cause an intermittent loss of connection during a warmup cycle. I have never had to replace an EVAP purge valve/solenoid so I cannot say if the PCM will...

Personally, I would begin by replacing BOTH the MODE and the DEFROST actuators. These are the two that control where the airflow goes AND they are the easiest to do. They are right next to each other on the drivers side above the area of the accelerator pedal. On my 2002 after the lower...

FWIW, I suspect something electrical. Perhaps something like a PCM ground or similar critical circuit without which the engine cannot run. I had an 86 TransAm, bought new, It sometimes would stutter after say 10 minutes of driving from cold start. Never showed any issues on a scan. Eventually...

That may be stepper motor failure? I cannot say for sure as I have never personally seen stepper motor failure. When the key is first turned to RUN do the gauges all sweep counterclockwise towards zero??

FWIW I think that only the Automatic Control systems have temperature sensors. The manual control versions have none.

Are you asking about PIDs 1155 and/or 002F ?? I have a 2006 PCM and at least on that unit both fuel level PIDs 1155 and 002F are supported. It is important to note that they report different data in that the 002F reports the fuel level directly and 1155 reports the fuel level sensor voltage...

I continuously struggle to follow these automotive schematics myself. I've gotten a lot better at it in retirement over the past 5 years or so. My experience outside of the automotive environment was primarily commercial HVAC stuff. There, everything is included on one large schematic. Much...

FWIW, those that have an OBD2 adapter and an app that reads live data PIDs.... You may be able to read the high side pressure with a custom PID entry. It very likely will not be included with the app but creating a custom PID entry can often be added. I know my TrailBlazer 4.2 PCM broadcasts...

Onstar Module is VCIM

Per the zoning diagram any electrical ground, splice, harness, etc that begins with "2" is located in the dashboard, NOT the main cabin. "SP206" is a typo.