IAT Sensor for an 86 2.5

[I_s2k]

Hey guys, finally worked up some courage and motivation to jump back into my Comanche project. 1986 2.5, 4 speed and long story short I’ve been chasing an issue where the Jeep will start and run(horribly at that, incredibly rich, sputters etc) only with the MAP vacuum line unplugged. Verified voltages on all sensors in and around the throttle body, rebuilt the throttle body, cleaned all grounds front to back, replaced MAP 3 times,replaced 4 small vac lines going to the throttle body, adjusted new TPS, new gasket on EGR, good vacuum coming from the MAP vac line, ECU appears to be fine visually and I’m getting 5v to the sensors tested. I'm now wanting to maybe replace the IAT, CTS, and maybe the o2 sensor. I haven’t really checked the latter but I know the IAT is smoked as I remember pulling it out and the end of it being busted to $#!&. Anyone have a line on a new sensor and if not, a conversion? It’s my understanding that these sensors no longer exist but I cannot for the life of me find a conversion thread. TIA!

[eaglescout526]

How bad does it look? As long as it has the bulb on the end of it, it should be fine. Should test it to see if it Ωhms out to spec on both cold and hot air. Same with CTS. 

 

Look at the O2 as well. Do you happen to have a REM? 

 

Does the heater relay for the O2 work? 

 

I am not aware of a conversion for the 2.5L. There is one for the 4.0L. BUT! The two sensors are different in thread size. 2.5L looks smaller than the 4.0 and I have a 4.0L one thats been converted. I also have heard of a relocation for the IAT as well. 

 

This kind of issue would drive me mad. Are all vac lines verified to be good and crack free? 

 

While its running, have you looked at the spray pattern of the injector? Maybe the seals around the injector are bad and causing it to leak more fuel in and its running rich and like garbage because of such.

 

Do you know how long it has been since that MJ ran and drove before your ownership? I went and did some homework on your MJ just to get caught up on what were gonna deal with.