Quote:
Originally Posted by Frank Reiner
tomeads:
Reading voltage at the throttle switch is misleading; the switch grounds either the idle controller (ICU) at closed throttle (Pin 1), or the ignition controller (EZL) at WOT (Pin 3). Pin 2 is the ground.
Your test should be to look for continuity to ground from Pin 4 of the ICU socket with the throttle closed. (Remove ICU from socket)
Since you did not mention idle speed in RPMs, what is your view of "fast"?
And, does the idle speed change between Neutral and Drive?
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The ICU is what you have termed a "relay"; it is much more than a simple relay.
Pin 4 of the ICU socket is in the ICU socket!
Locate the ignition coil, and follow the low voltage wires back to the EZL.
It is a box with two 4-pin plugs, a coax plug from the crank pickup, and a vacuum hose connection.
1800 RPM is indeed too high; specification is for 600 +/- 50 in N, 550 in D