PO300 code
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Joined: Jan 2007
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PO300 code
My 96 4.0 is throwing a po300 code and wonder what I need to check to fix this problem.I have changed all plugs with autolite pp105 and put new wires and a new fuel filter but still get that little stumble every now and then.Any help.
Post Fiend
Joined: Apr 2005
Posts: 5,720
Likes: 5
From: Washington state
air= vacuum leak, dirty MAF
fuel= one or more dirty injectors, low fuel pressure, front O2 sensor
further down the list
leaking valve on cyl 1
low compression cyl 1
that will give you a start
fuel= one or more dirty injectors, low fuel pressure, front O2 sensor
further down the list
leaking valve on cyl 1
low compression cyl 1
that will give you a start
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