I have a 2010 Ford F150 XLT 5.4L with approximately 340,000 miles on it. Before I ask the question about the issue, I want to give some background on what we have replaced that could have something to do with the issue. All timing items have been replaced. Both Cam Phasers have been replaced. Both Cam Phaser Position Sensors have been replaced. VCT Solenoids have been replaced. Now to the issue.

When driving at speeds higher than 10 MPH, it drives perfectly fine. From time to time, when I come to a stop, it feels like the engine starts shaking. All I have to do normally is rev the engine and the shaking stops. From time to time, it will throw the P0012 and P0022 codes at the same time. After driving around a bit, the codes clear themselves. Every now and then, when it starts shaking, it stalls out, but then starts right back up. From the research I have done, there are two options. One is to replace the engine as it may be going bad. The other is this issue may be a sludge issue so dropping the oil pan and doing a thorough cleaning would be the cheaper option. My fear is spending the money to drop the pan and the problem still doesn't get fixed leading to having to replace the engine anyways.

So I was wondering if anyone may have had a similar problem and what did you do to fix the issue.

 

Yeah, that’s a tough one. The pan needs to be dropped, since you’re losing oil pressure somehow. Whether or not the crank and/or the thrust washers were already trashed and never checked out is another possibility.

No shop in their right mind would have done a timing job on an engine with anywhere near that mileage on it for that reason.

 

It wasn't a shop that did the timing. I took it on myself. A timing chain guide was busted so I went ahead and did the timing components myself. I wasn't having this issue at the time though and didn't know about dropping the oil pan. At this point, I think I may be done throwing money into it to repair problems here and there and will just replace the engine. I wouldn't be the one to drop the pan as I don't have the time anymore so I would be spending money to do so. I would just hate to spend that money just to find out afterwards that the issue still persists and end up having to change the engine anyways. It's just so hard to say for sure dripping and cleaning the pan would fix the issue.