[A Cobra guy]

My 302 is running rich, WAY rich. it will cut out sometimes coming of idle, the exhaust pipes are black.

The set is as follows and was running fine until mid last season when this problem began.

Stock 302 long block. It is an Explorer P-head engine I have had since new. the intake, computer, wireing and all sensors are from a 91 Mustang. This combo was working fine for nearly 25,000 miles.

I have replaced the Throtle Pos. sensor and the Idle air bypass control.

Any ideas?