Quote:
Originally Posted by swagtime911
I think on this PCM the "open loop" really is used more for start-up than wide open throttle on this engine. On my last dodge the PCM had a very tight INT and BLM value window. Once you moved to one end or the other of the scale it would default a 14% value and detune. Next time you cranked it up it would read and detune again until it got into a measurable window. If you made a change it couldn't compensate for it would trip into "limp" mode until you took it to the dealer to have the PCM reflashed. It sucked. This PCM is not going to be as simple to crack and adjust like those of chevy. I wish we had something like an LS1 type flash, but I think were going to be screwed for sometime.
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I think the graph shows pretty clearly that the ECU makes a switch into open loop. It would appear that the run timing skewed the early portion of the graph.