intermittent PO300
09-24-2011, 11:57 AM
#1
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Join Date: 07-17-2011
Location: halifax
Posts: 46
intermittent PO300
hi
getting a random po300 random missfire code,no other codes.
i was wondering if the coils are covered under the powertrain/emissions warranty?
if not where should i start looking?
my mechanic installed 4 new ac delco plugs/air filter about a month ago,had no problems til this cropped up.
i do notice a stumble at idle before it throws the code.stays on for couple days then goes out but comes back in a week or less.
i don't think its the water in plug well as been dry as can be here.reset the gas cap also.
jeff
getting a random po300 random missfire code,no other codes.
i was wondering if the coils are covered under the powertrain/emissions warranty?
if not where should i start looking?
my mechanic installed 4 new ac delco plugs/air filter about a month ago,had no problems til this cropped up.
i do notice a stumble at idle before it throws the code.stays on for couple days then goes out but comes back in a week or less.
i don't think its the water in plug well as been dry as can be here.reset the gas cap also.
jeff
09-26-2011, 11:58 AM
#5
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Join Date: 09-10-2010
Location: Cleveland, Ohio
Posts: 904
My Cobalt SS did this. The dealership cleaned my injectors, checked to see if my catalytic converter was plugged, replaced fuel filter, and replaced injector harness.
They ultimately replaced my injectors as a whole.
They ultimately replaced my injectors as a whole.
09-26-2011, 05:51 PM
#6
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Join Date: 07-17-2011
Location: halifax
Posts: 46
09-26-2011, 06:04 PM
#7
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Join Date: 07-17-2011
Location: halifax
Posts: 46
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