Hrock

In the project of tuning the Prom. I noticed there are many aspects of the cooling system. My secondary cooling fan was never coming on, as its a A/C and 238deg back up fan. I had re-routed the signal wire from the relay to the Output of the primary. Now I get a cool running engine. But only its too cool. It Always runs, now coming to a stop with a cool engine the fans are both still running. This is extremely annoying. Not to mention could be creating Cold Run Wear on the engine. So I have No other idea why the Fans come on when I want 160+degrees before they come on. The engine never reachs that temp.
Also the Thermostat is replaced and if I unplug the fans It will rise in temp. thanks

coolram62

iTrader: (2)

Are you still running control thru the head temp switch?It could have failed in closed.This would keep circuit closed to the relays unless you've modified/changed the wiring.And one fan relay could stick closed but two would be an oddity.Check you PROM tuning you may have left a value unchanged/or changed to wrong settings.On this I understand how they work but not enough to tell you any further what to do.

Hrock

Switch disconneted, I think the safe assumption is that the ECM is controlling the Fan. I have looked up and down the flags and the tables, I cant seem to find why the ECM requests the fan to come on. Start driving it and park the car . Open the hood and the Fan is running. yet I never had it rise above the desired Fan on Time. I think there is a Table definition problem. Maybe my $6e Table is corrupt and its adjusting the wrong areas. I suspect this because the VATS dont work either. I mean I want to enable it. and Its like perminently disabled.