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Power Strokes
6.0 Tech
sudden RPM increase rough iddle
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[QUOTE="Long Gone, post: 1528710, member: 31343"] Thank you bismic. I didn't realize that the IPR is a bang bang valve, from what I had read I was thinking it was implied anyhow that it was a proportional valve. I saw a video with deiseltechRon talking about the ICP and saying that the % reading was a calculation from other sensor extrapolated from the fact that the motor is running so it is inferred that it is about some (%) value. WOW this seems more like an art than science. I am leaning toward thinking that the MAT sensor is grounding internally as the readings aren't flaky and are constant as I move around the harness with my Scangage2 right in front of me and the key in the on position (gauges active) motor off. They are so repeatable no matter how I move the harness. Since IH says that the MAT is a "thermistor" I'm thinking of wiring a pot through the connector to see if I can dial in a value that would be more in the range that the PCM is looking for. I'm not thinking that this is causing the problem though as I remember seeing the -40 value when I first got my scan gauge and everything fired up nicely and was running just fine. [/QUOTE]
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sudden RPM increase rough iddle
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