Normal Heat Range for a 2000 4.0L

[87manche]

Re: Noraml Heat Range for a 2000 4.0L

straight from page 7-9 in my FSM:

Electric cooling fan 4.0L: With or without A/C
request the electric fan will come on only when the
coolant temperature is at least 106° C (223° F), and
will remain on until the coolant temperature drops to
103° C (217° F) or below. Regardless of coolant tem-
perature, When air conditioning system pressures
reach 2068.5 6 138 kPa (300 6 20 psi) the electric
fan will engage and continue to run until the A/C
system pressure drops to 1620.3 kPa (235 psi) mini-
mum, then the electric fan will shut off.

So it's also tied in with AC pressures. Ours does not come on and the AC works great. lawncher did the evap and an AC compressor a few years back.

Maybe you've got too much pressure? Or maybe we've not got enough, but I know it won't come on with just the AC, even when it's hot, because I did the e-fan conversion on it and wired the third fan to the factory fan connector. The PCM is controlling it just fine, it came on and off while wheeling in Harlan.

 

[DrMoab]

Could be. When I had it charged last year they said the pressure was borderline high.

 

[Bbasso]

Re: Noraml Heat Range for a 2000 4.0L

Just to show you that a XJ can run cool...
here's mine: http://youtu.be/-w-KZzTvbTw

 

[TA2Jeep]

Re: Noraml Heat Range for a 2000 4.0L

Just to show you that a XJ can run cool...
here's mine: http://youtu.be/-w-KZzTvbTw

Screw the temps, that 24 mpg is damn awesome!!

:shiver:

 

[Bbasso]

Re: Noraml Heat Range for a 2000 4.0L

at 63mph I usually get 27 MPG l