Mechanics

I HAVE THE CODE PO300 AND IVE TRIED TO FIX IT AND SPENDING COUNTLESS MONEY ON PARTS I DONT NEED CAUSE ITS NOT HELPING THE MISFIRE ISSUE NEED HELP

2003 Nissan Sentra • 179,000 miles

Replaced the wire set and cleaned all the sensors and everything but the problem is still there
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Brookmiller
October 11, 2012.



Random multi cylinder misfire. May be a coil problem, plugs, egr valve vacuum leaks I would try and get a run on an engine oscilloscope, this will help nail down the exact cause of this problem.

Mhpautos
Oct 11, 2012.