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    So my car has been running horribly for awhile now. It misfires on all cylinders and when I replaced the coils and spark plugs, it'll run good for a few hours and then back to driving as if there were no power. It uses up a lot of fuel and sometimes during initial start, it would idle really low...
    I own a mk4 gti 1.8t. I literally just had it fully tuned like 2 months ago. Since then I have had an o2 sensor go out(not what I'm concerned about) but I was wondering if that would some how make my cylinders misfire since it has to do with my fuel. I was just driving Into town for work and got...
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