Dave WM Posted February 16 Share #1 Posted February 16 been working away on the test stand. other than an intermittent spark (think its a wire harness issue with the CAS but still need to confrim that with some more testing) all going well. I tested the idle up servo for the AC control. Works by applying a vacuum to a small hose, this allows bypass air to increase thus upping the idle speed. Works great. Question, the FSM calls 12v to be applied when the FICD is active. This goes to Pin 22. I cant for the life of me figure out what its supposed to do. If the idle up servo is work to increase the bypass air, what could the ECU add? If the ECU is only responsible for fuel mix and ignition fire and time, I would assume it has to be adjusting one of those. Seems to me bypass aire by default would take care of fuel mix do to the AFM. So that leaves timing. Perhaps it adjust timing, but seems to me added RPM would automatically deal with timing. Anyway hope someone has found out what this is for. Driving me nutz... Link to comment Share on other sites More sharing options...
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