Hello all,
I recently had a catalytic converter melt in my car and I removed it, drilled out, and cleaned it. Then I had the holes welded back up and bolted it back into the system. I replaced my gaskets but there was an upstream leak, and now it's pretty much open exhaust, and has been for the past month. Ever since it got clogged I've noticed lost performance, but now I really have been able to tell it lost all low end torque and just seems a tad slower even in high end rpms. Of course I have seen the code come up for o2 sensor misread, so I'm surely in open loop mode, but I am growing concerned that in the past 2 months I burnt my exhaust valves. What do you guys think? Could it just be due to loss of back pressure? Or are my valves burnt? Only other issue I've noticed is that when I am just idling it misfires and Sometimes it shifts a little weird.
Lastly, when I come to a stop, a lot of times I can feel the transmission disengaging around 5mph, and whenever I'm driving at a steady speed, and then I let off the gas immediately, the rpm actually goes higher for a split second before going down. Is that weird?
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