I have a 1988 jeep cherokee(xj) it has the 4.0 I6
My jeep seems to have this really bad flat spot that has only gotten worse. when i give it a little bit of throttle (in gear) it just sputters right to death,but when i give it more throttle it is just fine. also sometimes(not everytime) when i give it gas to get up to speed quick, it sputters and doesnt accelerate worth $hit, just cruises slow no matter if im giving it full throttle, but after a couple seconds it stops sputtering and starts racing up to speed like it should. Now i have replaced the tps twice,cps,and iac. i think it may be a vaccum leak seeing as though its idle sometimes shoots up,or drops really low and can make my breaks not want to work. but i dont know how to accurately test which one it could be, but i have checked most lines that are visible. any suggestions or advice would be much appreciated. thank you
My jeep seems to have this really bad flat spot that has only gotten worse. when i give it a little bit of throttle (in gear) it just sputters right to death,but when i give it more throttle it is just fine. also sometimes(not everytime) when i give it gas to get up to speed quick, it sputters and doesnt accelerate worth $hit, just cruises slow no matter if im giving it full throttle, but after a couple seconds it stops sputtering and starts racing up to speed like it should. Now i have replaced the tps twice,cps,and iac. i think it may be a vaccum leak seeing as though its idle sometimes shoots up,or drops really low and can make my breaks not want to work. but i dont know how to accurately test which one it could be, but i have checked most lines that are visible. any suggestions or advice would be much appreciated. thank you
CF Veteran
Go to the parts store and buy a can of starting fluid. Give every vaccum hose fitting a little shot and wait a few seconds. If the idle increases you've found your leak, if not you move on to the next one.
thank you, i will try the starting fluid trick
it got a tune up just a few months ago, and i replaced the fuel filter a couple weeks ago. also tried seafoam.
its had this problem since i bought it a year ago, but just now started getting worse where it screws with when im accelerating. also it kind of boggs down when im cruising on the highway, and i can push my throttle down all the way until just before it will drop gears and the speed or rpms wont change. doesnt accelerate unil i drop gears and punch it.
which is the new problem and why i need to try to fix it before it gets even worse
it got a tune up just a few months ago, and i replaced the fuel filter a couple weeks ago. also tried seafoam.
its had this problem since i bought it a year ago, but just now started getting worse where it screws with when im accelerating. also it kind of boggs down when im cruising on the highway, and i can push my throttle down all the way until just before it will drop gears and the speed or rpms wont change. doesnt accelerate unil i drop gears and punch it.
which is the new problem and why i need to try to fix it before it gets even worse