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P0300- Multi Miss Fire..... Help!

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Old 03-07-2010, 05:50 PM
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you made it through with no cats?

Mine has to be inspected this month.
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Old 03-07-2010, 05:52 PM
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I have high flow cats. But all they do is check with the OBD for any codes and that's it. You can go up to 90 days in advance.
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Old 03-07-2010, 05:55 PM
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your rear O2's are turned off though you have cats?
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Old 03-07-2010, 06:10 PM
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Yeah the rear O2's are deleted and mangnaflow high flows.
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Old 03-20-2010, 12:01 AM
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Okay I finally got this bug worked out. It was what Billy suggested, since I did a higher stall converter that was my problem. I had Justin adjust the tune accordingly and since I have been great!
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shifting is off, tune needed!!




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