Quote:
Originally Posted by Gave_up_my_Bowtie
These mods were done over the course of a week. The intake mods as well as the exhaust mods were done at wide open throttle. Therefore nothing should change because the computer is in what I think is called open loop which doesn't use the O2 sensors only the mass air sensor. At that point we are just running according to what the computer is mapped to run at. So many CFM= so much fuel. Thats why we need programmers or adjustable mass air sensors to change this setting or fool the computer. That was a concern of mine as well with testing over a short time. Thanks for the idea.
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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.