[bLodi]

My 88 GT when started up runs nice and rich when started. I have an autometer a/f gauge. But once it warms up a little it starts running really lean. it is all the way at the bottom of the red zone, even at idle. What is up? Any suggestions would help.
Thanks, Ryan

 

[anarchyx34]

Does it do this when under boost too? No bouncing up and down at idle? I'd say your o2 sensor has gone on a permament vacation. In fact, your car is probably running rich as hell, because like you, it thinks it's actually running lean.

 

[bLodi]

That could be, that could also explain why I am getting really crappy milage. I know I drive the car pretty hard but not enough to get like 11-12 mpg! I will look into it, thanks.