DougW wrote:
> Budd Cochran wrote:
>> 89 Jeep Cherokee 4.0 and all the bells and whistles
>>
>> I'm picking up new O2 and Map sensors and figured I might as well
>> replace the MAT also.
>>
>> Ok, O'Reilly's doesn't list one even after using ever acronym and
>> word combo I can think of.
>>
>> So anyone know where I can get one other than the local jeep dealer?
>>
>> BTW, we have AutoZone, O'Reillys, NAPA, I think an A-1 auto parts
>> stores.
>> HA-A-A-A-A-ALP!!!!!!!!!!!!!!!!!!!!!!!!!!!!
>>
>> Budd
>> (now so broke he couldn't put gas in it if it were 29 cents/gal.)
>
> I think those were common across most all the 4.0 engines.
>
> http://www.acmejeepparts.com/products/55121_0003.htm
> http://www.jeep4x4center.com/sensors...e-xj-sj-mj.htm

Either way, I'd test it first. Those usualy don't go bad

From the 88FSM
MAT Sensor
1) Disconnect wiring from MAT sensor. Using high input
impedance digital volt-ohmmeter (DVOM), check resistance of sensor.
Resistance should be less than 1000 ohms when engine is warm. Replace
sensor if it does not fall within range shown in
TEMPERATURE-TO-RESISTANCE VALUES table.

TEMPERATURE-TO-RESISTANCE VALUES (CTS & MAT SENSOR) TABLE
F . C . Ohms
(Approximate)
212 . 100 . 185
160 . 70 . 450
100 . 38 . 1600
70 . 20 . 3400
40 . 4 . 7500
20 . -7 13,500
0 . -18 . 25,000
-40 . -40 . 100,700