2000 XJ, 4.0 AT, AC, sometimes my temp will go a little high when idling,

The mechanic said the sensor would not start the Elect.fan until 230 degees, and the AC would not kick the fan in till Ac high side pressure hits 300psi. Fresh thermostat, Rad. fins clear, and cooling Sys. flushed.

Are there any lower temp sensors availible to start the fan quicker? any way to have the fan start whenever the ac is on?

Thanks Mike

 

fan should start as soon as ac compressure kick in

 

Your mechanic is not the sharpest tool in the shed, '00-'01 efans only come on when coolant temp reaches 218F (per FSM). They are not A/C sensitive like '99 & earlier. I believe it's been posted that the dealer could re-program the '00-'01 ECM/PCM to engage the efan when compressor engages.

 

ok

 

hard wire it to the ac clutch wiring

 

Check a wiring diagram for the high pressure side switch by the compressor. Seems if you were to run a splice between the AC sense circuit & the fan circuit it would work. (fan would run as long as the AC were on.)

 

How about a new water pump and fan clutch?

 

DJB383, would you know how to find the post about reprograming the ecm/pcm?

Thanks Mike