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01 4.2 with bad mpg please help

3085 Views 2 Replies 2 Participants Last post by  ctkunka
i had to cut my cats out and staight pipe. cats had backed up and cracked the heads and block. i put a new motor in and it drained the bank. now my millage has gone to nothing i have lost over 100 miles to a tank. is there a cheep fix to getting my milage back other than putting the cats back in. if anyone could help me that would be great
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I wonder if the PCM is adjusting itself because of the 02 readings pre- and post-cat.
i can tell that it is running rich. the smell of fule is over powering out side the truck. is there a programer out that is fully ajustable so i can program the air/fule mix
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