Quote:
Originally Posted by hunter4ever12
I'll try that tomorrow, or try another scan tool and see what results I get from it. I actually have access to several different ones (through co worker friends, and I have my 2 as well) i work at a feedlot and farm shop as a mechanic, but about 98% of what I work on on a daily basis, are either obd2 Powerstroke diesels, semi trucks, or heavy equipment/farm equipment. So my obd1 gasoline engine skills aren't what they could be compared to other vehicles. As far as I'm concerned obd1 is a pain in the ass.
But anyways I'll keep digging on this issue and see what happens and report back. But just to clarify, what your saying is; the readings the TPS showed on the scan tool CAN NOT be from a faulty TPS correct? It's either an ECM or scan tool problem. That's how I interpret what your above post says.
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I don't guarantee anything that doesn't happen on MY scan tool.
I do not understand how the same data stream that shows change on TPS voltage with application of throttle, does not show change on TPS percentage. To me, that has to be a scan-tool problem.
But then, 5.8 volts at idle for TPS voltage is crazy, too. It should be less than one volt unless GM changed their system.
That's why I suggest re-checking with another scan tool, or verifying that your scan tool shows proper readings on a different vehicle.