2011 6.2 losing power

[TCR 223]

Plugs for sure, 72K change for mine... made a world of difference. i'm at 87k now. for a 6.2L with 300K... wow, getting close to end of life territory. maybe add the magical high mileage sea foam in it! add it to the oil and fuel. I used it (fuel and engine oil) in our 6.2L shop truck with 200k and it purs like a kitten. no expert on it and i'm sure there are people out there that disagree but at 300K and loosing power, I don't think it is a bad option to consider.

 

[STEPHEN T SHELLEY]

I thought I had a lot at 175k, I'm excited to know my truck can possibly get to 300k!! Congrats on that, and I agree with above recommendations. Might be worth swapping the diff. and trans. fluid too if it looks like that hasn't ever been touched....

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[Marlboroman]

Astounding the cam phasers have made it that far even on the 6.2, question does it sound like a power stroke when you start it sometimes? Maybe rattle a little when you give it throttle around town? Personally at 300k miles I’d start planning for a trany rebuild and a short block then drive it like I stole it. My last Ford made 327k but I called it the 5.4 power stroke f 1 ******.

 

[BenBB]

Impressive!!! I'm around 185k, I figured I'd get at least 200-300k out of it in stock form. I agree with @Marlboroman it's time to start thinking rebuilds if it's all factory (sucks you have no records at all, I wonder if the valve springs are factory original). And upgrades of course.

nope. pull the 2 torx (t15 i think) and use some cleaner on it.

Or just loosen the two hose clamps, disconnect flaky 90° connector that likes to break, and hold the intake tube the MAF lives in over a rag or something whilst hosing down the sensor (from downstream direction toward upstream) for 5-ish seconds with something like this:
https://www.amazon.com/dp/B000J19XSA/?tag=fordraptorforum-20

I clean the MAF every air filter change, and I change the air filter every other oil change. You're definitely overdue on spark plugs, would be worth trying and ideally with wires and coils. Any codes at all? Got a reader that'll read stored codes?

 

[BlueOvalF22]

I'd do the plugs, coils and wires. I bought a 150,000 mile machine and doing that woke it up a ton.

Then the next things to do are

1. to check/replace the cats. That will make it a dog and at 300,000 they are probably toast.

2. Replace all the valve springs, seals and retainers with the aftermarket ones that don't break, then replace the cams and lifters.

The superdutys with 6.2 I see over 300,000 miles had cats, spings and cams done.. They aren't show room peppy but not dogs.. Actually I think they had timing chains and phasers too.

 

[JA1972]

You said Cats there is 2 on there ?
Thanks for all the suggestions really appreciate it..gonna put it on a machine and see if it reads any codes..Was already thinking of doing the cat because I wanted to modify the exhaust on it..previous owner basically used it on freeway back and forth didn’t really get crazy with it..

 

[CoronaRaptor]

You said Cats there is 2 on there ?
Thanks for all the suggestions really appreciate it..gonna put it on a machine and see if it reads any codes..Was already thinking of doing the cat because I wanted to modify the exhaust on it..previous owner basically used it on freeway back and forth didn’t really get crazy with it..

Read this thread on converters:

https://www.fordraptorforum.com/threads/catalytic-converter-question.54753/

 

[BlueOvalF22]

Because you are in CA cats have to be OEM.

https://www.getoemparts.com/oem-parts/ford-catalytic-converter-driver-s-side-lh-al3z5e212h

https://www.getoemparts.com/oem-parts/ford-catalytic-converter-passenger-side-rh-al3z5e212e?c=az0x

About $1200