Quote:
Originally Posted by biggz2332
losing compression to or car just running ****ty?
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i never checked compression, but the reason you get bad MPG whem misfiring is that the 02 sensor interprets the dead cylinder (which is just pushing fresh air) as a lean condition for the whole engine, so it says "lean?! oh crap.. let's add more fuel to compensate" and in reality you end up running really rich, which wastes gas. then when you're on 4cyl (#1 and #4 dead, for me) the car is just abysmally slow. Like... I could floor it in 1st gear after launching, and it would rev as though you were in 2nd, not 1st.