1997 Pontiac Firebird 6 cyl Two Wheel Drive Automatic
Car idles fine. Car begins to misfire as I start to accelerate. Problem is worst when engine is cold and gets better as engine warms up but never completely goes away. Problem started immediately after getting gas. Don't know if this was just a coincidence or if the gas is the problem. Have tried adding Heat to gas but hasn't helped. Car has been showing code P1406 intermittently for several months now but has been running fine until a few days ago. Now showing codes P1406 and P0300. So my question is this, do you think it has something to do with the gas or the EGR valve or something else?
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Saturday, October 23rd, 2010 AT 7:27 AM