Ok first off I know I know, air fuel gauges tell you nothing, but my car runs horribly when the signal on my air fuel gauge goes away. Car runs great when it is in the Green, ie rich, great when in yellow ie stoch, and ok when it is in the red ie lean. But alot of the time the signal goes away and the car seems to be robbed of power. That has happened for awhile now. But here in the past few weeks the car has started misfiring or stuttering. Almost sounds like it backfires sometimes, but not out of the exhaust. Its at the shop right now but the mechanic and I are stumped. Please help. We are going to check the dist. cap, rotor, spark plugs and wires and also look for leaks with the boost controller. Any other ideas. These seems beyond the CHANGE the igition equipment like everyone else says. SO PLEASE HELP!!! THANKS in advance.