havent posted a question in a while but i need help with this one. 99 cherokee 4.0 aw4 tranny. 114k miles. it has a slight shake at idle that i can feel and can see the rpm needle fluctuate a bit but not a lot. it only happens at idle wether im in park, neutral, or in gear. it doesnt die out or anything like that and has good power over all once i give it gas. no chocking or bogging issues. it has new plugs (champions) , wires, cap, rotor, cleaned throttle body, and clean IAC, new air filter, ccv hose and elbows all new. doesnt burn oil and coolant is good. it feels like a misfire shake every 2 seconds but it isnt throwing any codes at me and all systems read fine on my torquepro app. any ideas? maybe ignition coil, bad injector? help me out guys

 

Can't read the O2 sensor with TorquePro?

 

You think it's a bad o2 sensor?

 

Could be. TorquePro should let you see it in the displays.

 

Ok so what am I looking for exactly. Fluctuation in the reading?

 

It should go from .1 to .9 rather rapidly.

 

Alright I'll check it out thanks

 

TTT

 

Does anyone out there have any PIDs files to download and use use for the XJ that arent already on the torquePro app?

Not sure if I used the correct terms to ask that question.... but its a start.

 

I know what you are asking, but don't have any specific data.

I use TorquePro on my Subaru all the time as an add on gauge panel. At one point some of the PIDs I was using vanished after a Torque update. I found that there is a Torque forum or wiki where people talk a lot about these kinds of things, but it looked like a big enough hassle that I decided I didn't need that PID anymore since it's a daily driver, not a track car.

 

I'll try and track some down. I really wanna see my oil pressure on something other than the dash gauge. My psi has read 60 since I bought the XJ in Aug 2019. I changed the sender and it still reads 60. And never really fluctuates.
The caveat is when I was putting the new sender in, I cracked the plastic housing. So I dont know if my old sender was bad and now this one is too, or if I have another issue.

 

Some cars will have an oil pressure gage that is reality only hooked to switch. I had a car like that, gage was either at mid range or zero. basically it was a idiot light kind of set up, an idiot gage I suppose. I know some xjs had no oil gage, if this their attempt at an idiot gage?