Jeep Cherokee XJ Throttle Body, IAC, TPS & MAP Cleaning & Replacement

[@Watevaman]

Thanks Jeff. Gonna save this one for the future, need to chase a hanging idle on the XJ, but even if it doesn’t pertain to the IAC, I’m still overdue for a good cleaning.

[@DIYwithDrJeff]

Cool. Mine has a better idle at cold start right now. I'll make an update video once I've got enough run cycles to see if it helped in general. But, I think my Jeep needs some other basic maintenance (spark plugs, etc.) that was neglected by the prior owner. That stuff may also help my idle issue.

[@drew-shourd]

Thanx Jeff, great video

[@DIYwithDrJeff]

You're welcome! Thank you for watching.

[@swatscorner]

Fantastic video! Thanks!

[@DIYwithDrJeff]

Thanks. I'm happy you enjoyed it.

[@outersketcher]

What year is your xj? Ive got a 95 xj. And when I do a job like this thats going to require the cpu to relearn the parameters of the new sensors… I disconnect the battery. And then after about 20 minutes, I touch the pos and neg battery cables together. Note: you can do this on the ‘96 and older xj,s. But Ive read that you do NOT touch the battery cables together on newer models.) For the newer models, touch the pos cable to a solid ground on the frame or engine. Re install the battery cables and then turn the key so can turn on the headlights. This tells the cpu to dump the saved info and start relearning new info. Ive been told that the next fifty start ups are what the cpu uses to relearn the new parameters of your xj. Sooo.. I like to take the jeep out for a couple of good, long drives on a highway as well as normal puttering about on regular town roads.

[@DIYwithDrJeff]

2001. Thanks.

[@drew-shourd]

For sure, the cpu needs to 're-learn' some high and low parameters, always unhook the neg terminal and when all is complete, take it for a drive, accelerating and decelerating to help the system to reset.

[@Mr.Kupz10]

Hi there, Do you need to disconnect the battery when removing that whole Throttle Body?TIA

[@DIYwithDrJeff]

According to the service manual it doesn't say to do that. To try to get the computer to "learn" there was a new IAC and adjust the air flow I disconnected the neg cable after I was all done. But, that wasn't part of the procedure itself. In my case my rough idle is only marginally better so I plan to go down the stepladder suggested in the manual to address it. I'll try to make a video on that later.

[@Mr.Kupz10]

@@DIYwithDrJeff Thank you so much.cheers

[@urwholefamilydied]

@@DIYwithDrJeff any updates? I'm also having major idle issues. I've now resorted to throwing my jeep into neutral at stop lights while slightly revving the engine with my right foot, and my left foot on the brake... LOL. Sketchy as fukkkkk.