I posted this on NECO also but want to get input from you guys as well as to what I found out.
Ok for thoses of you who don't know, a few weeks ago the MC-NECO guys had a mod meet where we put a pressure switch on the lower manifold which would be used to turn on a little red light inside the cabin of the car whenever the secondaries butterfly would open. This switch is physical so if the IMRC box is malfunctionning I would know because the light would not come on.
Now I can tell you FOR SURE that the RPM does not control the IMRC box. I can only see RPM being used as a lower limit. I was able to rev upto 5000RPM without opening the secondaries... i could of prolly went farther but hearing the engine scream like that in second gear for that long was not fun. Essentially what i did was apply very little throttle and the engine eventually climbed to that high RPM. Now when you step on the gas the secondaries open up. I say there is a lower limit because they will never open under aprox 3100RPM. No matter how hard you step on the gas. Also while doing some hwy driving i was able to get the secondaires to open and close and open and close etc, by feathreing the gas pedal on/off and doing so just slightly, which leads me to beleive that the TPS sensor is the responsibility for the secondaries opening up. Of course my foot is not the best way to measure this, but with the same amount of throttle i could open the secondaries at 3300 just as well as at 4300 RPM.
Next up getting an autotap on the car tracking TPS, RPM, MAF and somehow tying this into WHEN the secondaries open/close based on my light.
Anyone care to chime in here?
2000 Cougar V6 MTX
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Visteon GFX Kit with Razzi rear skirts, Ground Controls, YoDude Exhaust, Ractive Filter, Custom Interior, Custom Loud Stereo, and more...
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