REQUEST OF Waveform 2003 F150 4.6
thank you for your time and help .
I think the problem with this engine is in only has one cam sensor. A waveform may not show the problem. An in cylinder pressure transducer test would give better results, if you have a pressure transducer set. Test one cylinder on each bank and it will confirm a cam timing issue on the one bank. At this age I will say it's due for a complete timing chain set, oil pan clean out and a new High…
Isn't the cam sensor in the driver's side head? 5,6,7,8 I agree with glenn… but maybe an exhaust restriction is causing this, one bank Mode 6 data can confirm misfires
I’d start with a back pressure test. The rich bank usually has a blocked cat
Anselmo; Good morning Sir, I hope all is well. I'm attaching a URL to a video put together by Bernie Thompson and the team at ATS, youtu.be/krrizI4fwkE Using Fuel Trims during a test drive should help you diagnose the vehicle, especially if its a plugged catalyst. I hope this helps,