OP
OP
UPDATE:
FINALLY, it feels like a supercharged 6.0! Turned the corner around my block, lit 'em up about half throttle and drifted a few yards.
Damn cats were clogged..really bad. I stuck my leaf blower into one cat and nothing came out the other end. The other cat flowed some, but not like it should have. So I cut out the cats and welded in some exhaust tubing in place and took it for a test drive. Un-f'ing-believable to say the least. I only went around the block, so I haven't driven it enough to see if the DTC is still active. Hopefully this takes care of the problem. I'm going to drive it around a little more tonight and see if removing the cats ghosted the P0300 code.
I disconnected the cats when the problem first came about, but at the time, one of the injector wires in the harness came loose and BOSS and I were unaware of it. So when we disconnected the cats, the idle and afr were still whack, so we figured the cats weren't the problem. So after going through the entire p0300 diagnostic table and symptoms about 30x's and not finding anything wrong, I went back to the cats again today and pulled them off. I tried to blow compressed air through it, then stuck my leaf blower up to it and thats when I found out for sure the cats crapped out. A restricted exhaust will cause a p0300 and errenous afr readings, so hopefully all my problems were from that.
FINALLY, it feels like a supercharged 6.0! Turned the corner around my block, lit 'em up about half throttle and drifted a few yards.
Damn cats were clogged..really bad. I stuck my leaf blower into one cat and nothing came out the other end. The other cat flowed some, but not like it should have. So I cut out the cats and welded in some exhaust tubing in place and took it for a test drive. Un-f'ing-believable to say the least. I only went around the block, so I haven't driven it enough to see if the DTC is still active. Hopefully this takes care of the problem. I'm going to drive it around a little more tonight and see if removing the cats ghosted the P0300 code.
I disconnected the cats when the problem first came about, but at the time, one of the injector wires in the harness came loose and BOSS and I were unaware of it. So when we disconnected the cats, the idle and afr were still whack, so we figured the cats weren't the problem. So after going through the entire p0300 diagnostic table and symptoms about 30x's and not finding anything wrong, I went back to the cats again today and pulled them off. I tried to blow compressed air through it, then stuck my leaf blower up to it and thats when I found out for sure the cats crapped out. A restricted exhaust will cause a p0300 and errenous afr readings, so hopefully all my problems were from that.
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