Cooling issues
Burning Brakes
Joined: May 2007
Posts: 965
Likes: 13
From: turn 12 at Road America or TX
May be something really simple: The hard line from the AC compressor to the evaporator has two pressure switches, one for low pressure and one for high pressure. When the system pressure gets too high, both fans come on to bring the system pressure down. On a correctly operating system, just disconnecting the high pressure switch connector will turn the fans on. Seems to me that MA and Ecklers used to sell a manual switch kit that connected into the high side switch so the driver could turn the fans on any time the AC was not running.
So check around the high side pressure switch to see if some extra wiring has been cobbled into the harness. Or the high side switch may have failed - I think it's a normally closed switch.
BTW, this is all from memory - I have a pair of 91s but the 94 probably operates the same.
So check around the high side pressure switch to see if some extra wiring has been cobbled into the harness. Or the high side switch may have failed - I think it's a normally closed switch.
BTW, this is all from memory - I have a pair of 91s but the 94 probably operates the same.
Burning Brakes
Joined: May 2007
Posts: 965
Likes: 13
From: turn 12 at Road America or TX
Hmm, i wonder if my uber sucky fuel mileage (13) could be caused by the ECM thinking the engine is really hot and running the car too rich...?
Bought the fan temp switch today, $13, I'll post the r2 results asap; looks like it's going to be hard to get to though, of coarse :P
Bought the fan temp switch today, $13, I'll post the r2 results asap; looks like it's going to be hard to get to though, of coarse :P
What does the fan temp switch do on the 94? On the earlier cars the ECM monitors the engine temp and several other conditions, and controls the fans.
