I have a 2001 wrangler Sahara automatic 167000 miles I started having the code p0442 thrown out fix the problem by changing the leak detection pump and the purge valve as soon as that happened I started throwing a p0306 code the auto shop changed spark plugs and used a fuel injector test drove it and got a p0300 and a p0305 changed the 02 upstream sensor and got code p0300 and p0305 replaced spark plugs to champion instead of auto light the shop put in and got codes p0300 p0304 and p0306 what could be causing so many misfires should I change the coil pack? Fuel regulator ? Any ideas
Also forgot to mention usually after clearing code I can drive for weeks with no code once I drive above 55mph is when I get the misfire codes
Also after 2 weeks of no p0442 it came back on last night.
Also forgot to mention usually after clearing code I can drive for weeks with no code once I drive above 55mph is when I get the misfire codes
Also after 2 weeks of no p0442 it came back on last night.
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