Crazy Issue-1997 4.0L explorer

[boostedneon]

hey guys/gals I have a 1997 4.0L explorer that I am having some issues with. Here is the scenerio: Every once in a while I will go to start my explorer and it will start, but run like poop for about 10 seconds then die. Then other times I will get it and it will run like a top. Now the only code that I am throwing is bank 1 o2 sensor. I have read on this forum (prior to posting) that once in a while the manifold gaskets will blow and in turn accept fresh air in to trick the o2 sensor(s) into thinking its lean/rich. So the engine will compensate. I would also think that if that was true it would do it more than once every 2 months or so.

Now could it be a IAC just needs replaced or cleaned? Also I have heard that the timing belt tensinors have oiling issues and once in a while will be out of whack. Could that be a possibility? Thanks in advance.

[theonlywon_2@hotmail.com]

I have the same make, model, and problem, all I did was I cleaned out the front of the throttle body with carb/choke cleaner and replaced bank 1 & 2 sensor. I have't had the problem since. O and make sure you clean the back of the choke, thats where it gats all the build up.