2003 Ford F-150 4.6L - P0171 & P0175 DTC Troubleshooting and Timely Fix!

In this exciting episode, join us as we dive into the diagnostic journey of a 2003 Ford F-150 4.6L that came into the shop with the pesky P0171 and P0175 Diagnostic Trouble Codes (DTCs). Customer thought he had it all figured out with new MAF sensors, EGR, vacuum hoses, PCV valve, and fuel filter, but problem was still there.
Watch as we share the valuable lessons learned from this diagnostic misadventure, where a misinterpreted VE (Volumetric Efficiency) test led to a refund for the customer. Persistence and thoroughness paid off, as an in-cylinder test uncovered an unexpected issue - advanced timing by about 23 degrees.
Discover how we diagnosed and solved this timing issue with a necessary timing chain repair, bringing this trusty Ford F-150 back to its optimal performance. If you're into auto diagnostics, troubleshooting, or simply love a good automotive challenge, this video is a must-watch!
Don't forget to hit that like button, subscribe to our channel for more automotive adventures, and ring the notification bell to stay updated with our latest content. We're here to share knowledge and experiences with fellow gearheads like you, so join us on this exciting ride and let's get that F-150 back on the road!

[@frankwrenchman4573]

Thanks for the information

[@sussytroy]

Would a 2000 Ford e-150 with a 4.6 be the same cause I have both codes and really bad hesitation

[@MasterAutomotiveTraining]

Yup, thats a common issue. Chain stretch is brought on due to age, wear and lack of lubrication.

[@careyautorepairs]

Top man brother.

[@osvaldopena1105]

How did you verify timing was off ? Valve covers off and crank at TDC?

[@MasterAutomotiveTraining]

In-cylinder pressure test with a scope and ignition sync. Used that to sell the teardown, once torn down we confirmed what we already knew based on scope capture.

[@lesliehorwinkle]

@@MasterAutomotiveTraining so we if we don't have a scope? Can we take off valve covers and put crank at TDC?

[@Americadoe]

You said the scope showed 30 degrees before top dead center which is an advanced timing setting. But your photo of the cam gear, according to your marks, shows retarted cam timing.

[@chicagoalmighty45th95]

I need to get better at an oscilloscope.. I would forsure solve way more problems faster

[@MasterAutomotiveTraining]

We have many scope videos on our channel make sure to check them out.