It will get worse and your idle quality will start to go downhill. It will want to die at stoplights and hesitate on takeoff. You will probably start throwing lean bank one or lean bank two codes.

It is almost garrenteed to be your intake manifold gaskets. They run about 18 bucks a pop from St Charles Isuzu 1-800-727-8066. This is definately a known problem, as Isuzu has come up with a new part number, that is supposedly less prone to cracking.

It's a pretty easy DIY job.

Joe

A gun in the hand is better than a cop on the phone.

98 Passport 33's, Supercharged, Calmini Bumper, rockbars, diff drops, Teralows, 4.77's, Aussie and ARB lockers, Safari snorkel, Optima red top.