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I have a 90 xj 4.0, About a month ago i went and got an emissions test and failed, the guy there said a tune up should fix it, so i went and changed plugs, wires, oil/ filter/ air filter, fuel filter, transmission fluid. took the throttle body off replaced the gasket and cleaned it. There right...

I have a 90 xj 4.0 : when i start my jeep it was running rough so after i noticed that i figured i would let anyfuel cycle thorugh thinking that might do something and no it didnt so then i revved it up to about 3k for 10 sec or so le off and it all died i read other forums and found people...

any help on this would be greatly appreciated, i have a 90 xj, its pretty big pos but its my lil project, and about a week ago i went and got an emissions test on it and failed pretty bad, but any ways changed plugs wires, fuel air, and oil filter along with fluids, but anyways to my problem...

i have a 90 xj 4.0 and everything was running fine until i went and got an emissions test and failed pretty bad so i immediatly went and chaged the spark plugs wires, fuel filter air filter oil, and oil filter and then i took off the air hose to the filter and removed and cleaned the carberator...

I have a 90 xj and my turn signals work. But most of the time when i turn them on they will stick and not blink, and some times they will work fine, then sometimes they will start to work after about 10 seconds of not blinking. any help would be great, thanks

i have a 90 xj and its more or less a beater so i dont really no where to start looking but when i turn on my turn signals either one sometime they work fine and other times they will stay constant and wont blink at all then sometimes it will stay constant for 10 seconds or so then it will start...