2005 5.4 3V - multiple codes
#1
#2
I would start by correcting the miss fires 1st. start with fresh plugs and check the COPs...make sure everything is firing correctly. then I check the injectors....Ford did a extended warranty/customer satisfaction on them for 05', maybe your Navi will qualify?
#3
#4
Its hard to say what happened in what sequence of events? To get a better understanding of whats happening you will need a scanner capable of a "mode 6" scan...meaning it is able look at exactly how the sensors are functioning and the rate of misfires, ect. but that isn't cheep
#5
The misfire codes showing all four cylinders on the left/drivers side strongly suggests the wiring harness connector for that bank leading into the larger harness connected to the ECM has become an issue. I'd check that first.
The 02 sensor might be throwing a code since too much unburned fuel is being pushed into the exhaust stream due those misfires.
HTH
The 02 sensor might be throwing a code since too much unburned fuel is being pushed into the exhaust stream due those misfires.
HTH
#6
The misfire codes showing all four cylinders on the left/drivers side strongly suggests the wiring harness connector for that bank leading into the larger harness connected to the ECM has become an issue. I'd check that first.
The 02 sensor might be throwing a code since too much unburned fuel is being pushed into the exhaust stream due those misfires.
HTH
The 02 sensor might be throwing a code since too much unburned fuel is being pushed into the exhaust stream due those misfires.
HTH
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Chrisess
Modular V8 (4.6L, 5.4L)
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04-15-2017 02:40 PM
rowekmr
1997-2006 Expedition & Navigator
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02-15-2017 09:26 PM