i have a 1990 xj with renix motor have been going through gas like crazy replaced the o2 senser was told it is probably a vacume leak if its not that maybe iac valve, tps senser anysuggestions

 

Check the map sensor line it goes from the firewall there's a rectangular sensor with 3 wires and a vac line that goes to the tb make sure it's connected and in good shape. I had mine come out and it idled like a cammed up big block

 

thanks for the tip ill take a look and keep you posted

 

so i noticed a line that wasnt connected its small hard plastic goes from map senser to passanger side of my throttle body thanks again gonna replace that soon would that explain my poor fuel economy too btw

 

I Dont Know I just realize that my mpg is honing to suck

 

When was the last time you did a FULL tune up, and what was replaced with what?

All Renix owners need to read this:

https://www.cherokeeforum.com/f2/cru...x-tips-153663/

 

did full tune up prior to the rough idle cap,rotor, wires and plugs bought from baxter auto parts plugs i ran what a pulled out standard NGK V power copper ran fuel treatment since my XJ sat for almost 2 years also replaced o2 senser havent drove a whole lot yet but i think the vacume leak was the main for my MPG issue since the line ran to my map senser

 

does anyone have any info, pics video links on replacing ignition switch. When my jeep is running and the key is in the start position I have no acessories such as wipers, turn signals, stereo and heat. I already replaced to cylinder lock

 

Does anyone have info on replacing Ignition switch such as pics or video's on 90 XJ