vltrue

Im about to buy a 1990 jeep cherokee larado. But it doesnt seem to idle. It will start up fine but it doesnt idle. Sometimes it will idle just fine, but when you put into gear and try to drive off, it dies. Then its hard to get it started. Anybody got any good ideas on what mifgt be wroung with it?

kc0dws

TV cable
TPS
MAP
IAC

swells

clean the throttle body, air intake system when I got mine it was just like that and when it gets dirty it runs that way

DEVILSTOY

X2 and change the fuel filter too

littleredXJ

Make sure all your vacume lines are good. Try pulling your idle air control valve off and spraying it out with carb cleaner. I've got a 90 and it started running at 3000 rpm at idle and I had to tap on the IAC valve to break it loose and make it work again.

XJ JJT

Also try High quality fuel injector cleaner. Water remover in gas tank.

New spark plugs affect idle. Positive if done with care negative and the parts are good.

lestatsghost

check for exhaust leaks too. the air cleaner can get clogged pretty bad and cut the engine out too.

tactical40cal

try spraying brake cleaner in the intake while it's idling. if it idles good then you have a fuel problem. i have a 90 cherokee pioneer and mine was doing the same exact thing. i changed the filter and poured seafoam down the intake then in the tank. that worked for about 3 days then it quit running all together. i dropped the tank and found that the 3 inch rubber fuel line elbow that connects the pump to the metal fuel line was beyond destroyed. i changed that 50 cent hose and it's been running fine ever since. if you try the seafoam you pour it into the intake with the engine running till it stalls out and dies. let it sit for about 10 minutes then fire it up but make sure you do it in an open area. it's gonna smoke like a train!!! give it a shot and shoot me a message if you make progress or have any other questions.

90xjlaredo

When i bought my 90 xj laredo I had to drop the tank and clean it an replace the fuel pump assembly and fuel filter and it runs like a champ now!