1990Pioneer
NAXJA Forum User
- Location
- Denver, Colorado
Hello all! It's been awhile since my last post. My jeep, 1990 XJ Cherokee Pioneer has been running like a top for over a year now with no problems. So, I'm due for some issues. I started it after work yesterday and immediately noticed that it took about three times longer than usual for it to start, usually it fires right up! On the drive home I felt it bogging down, hesitating with acceleration and a low,rough idle speed. I gave it a look over at home, the spark plugs, wires, rotor and distributor cap all are fine. I couldn't find any loose or disconnected vacuum hoses. I added a bottle of injector cleaner and let it run for a bit, I'm not convinced at all that that is the problem. At one point I manually gave it throttle near the air intake and occasionally noticed a muffled popping sound from the air filter box. I'm wondering if it is that exhaust/intake mechanism that is controlled by some sort of vacuum switch. It has a louvre inside that open and closes. It was in the closed position the whole time, blocking the hose that goes off the exhaust. I'm not sure exactly how this works, could be totally unrelated. The ignition system seems to be operating properly, there is plenty of spark! ANY THOUGHTS ARE GREATLY APPRICIATED AS ALWAYS! THANKS AGAIN !