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Message: [QUOTE="Irontx, post: 62529, member: 280"] Trying to figure out what the duty cycle for the variable fan should be. Reason.......... My temps are all over the place. Cruising at 70-75, My EOT will sneak up to 215.:shocked: ECT around 210. Then suddenly, ECT will drop like a rock. to say......202. Then EOT will start to come down. Scanned it when I got home. Fan duty cycle goes up to about 20% when ECT would get to 210. Then would drop to 0%. like NOW.Never would bring the temps down to normal. Would bounce from 0% to 30% at an idle like it was on a toggle.I can command it to 100%, which gets me 30% DC, hold 1500RPM and the temps start falling off.Will get down to 185/190 respectively. Never payed attn to fan DC so I dont know what its normal routine is. SO............ looked through my WSM and cant find anything on it. Anyone got something on this? Have a spare laying around,LOL, just dont want to crack it open for no reason. What do yall think?? Fan clutch? [/QUOTE]

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