myHEEPis.rad

hey guys got a Q about my 91xj, sometimes when i come to a complete stop i start to sputter or when im out wheelin sometimes it wants to sputter for a few secs once i get to the top. what would cause it to do that to me? it seems to get worse as the days go on.. any idea what i could be looking at to fix or clean???

myHEEPis.rad

buuuuump...

UserID6095

Have you tried a fuel system cleaner?

myHEEPis.rad

no i havent. should that be the first thing i try out?

UserID6095

Yes. A tune-up comes to mind as well. New fuel filter, plugs, wires, cap and rotor.

myHEEPis.rad

did the tune up a few weeks ago actually. only thing not new is the air filter cause it looked good.

UserID6095

So did it sputter before the tune-up?

myHEEPis.rad

yes it did sometimes, but not as bad as it does now.

UserID6095

Well a sputter should be fuel related. So try some cleaner, it should smooth out. How many miles on the rig? May have a leaking injector, low fuel pressure, or bad Idle control vlave, vac leak, and so on.

myHEEPis.rad

165,656 miles are on it currently. wouldn't i be able to tell if my injectors were leakin @ all? ima try some cleaner stuff to see if that helps @ all

UserID6095

The sputtering is how you could tell. Make sure you have the proper fuel pressure and go from there.

myHEEPis.rad

how do i go about checking the fuel pressure?

myHEEPis.rad

well i bought some fuel system cleaner yesterday and it seems now when i come to a stop or when it just idles it acts like it wants to die but than jumps back up to normal idle. for giggles im gonna record it tomorrow to show you all

UserID6095

Does it do this when your coming to a stop? I noticed mine has started to have a slight dip below 750rpm when coming to a stop. It will catch its self and rev back up to 750rpm for idle. Leads me to believe the Idle Air Valve is sticking.

Did it atleast smooth out? No more sputtering?

myHEEPis.rad

yep exactly what mine does. always ketches itself tho and still hasnt stalled.. nope still hasnt smoothed out at all. gone thru a half of a tank and havent noticed a thing.