Power loss
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Senior User
Joined: Mar 2009
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From: Pekin,Indiana
Power loss
I have a 2000 F-350 PS a ts 6 position chip MBRP exaust and K&N filter Also the pop off valve to fool the map sensor. Latley I have noticed a power loss and it seems to happen when the truck has warmed up about halfway. when ever I just get in of the morning and go like I shouldnt it seems to have a lot more power even more turbo boost. It will hardly ever get over 22 psi. Other times it will go up to about 25 psi. I'm alaways in the 50 hp position it dont get much better in the 100 hp position but you can tell a difference. Any advice I also recently unpluged the Exaust back pressure sensor. Thanks to one of your topics.
Post Fiend
Joined: Mar 2007
Posts: 26,966
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From: Texas
Have you started by checking the simple stuff? Engine oil clean, full, and not past due for a change? Fuel filter good? Is the K&N a drop in or CAI (cold air intake)? There have been some issues with K&N filters in front of a 7.3 turbo. They've been know to let too much small dirt through which can dust your turbo wheel, or worse the engine. It's worth taking a peek inside the intake tube and make sure there are no signs of dust in the tube and the edges of the wheel look clean and sharp.
Have you checked for boost leaks? Check the 6 boots on the intercooler plumbing and the up pipes where they connect to the Y behind the turbo.
Have you checked for boost leaks? Check the 6 boots on the intercooler plumbing and the up pipes where they connect to the Y behind the turbo.
Thread Starter
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Senior User
Joined: Mar 2009
Posts: 331
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From: Pekin,Indiana
Yes there is signs of black around the up pipes. I wouldnt think that that little bitt would make a diiference. The oil just changed every 3000 miles. fuel filter also. This has been going on for over 6 months. After I insatlled the TS tuner from a diablo tuner it was a lot better for about two weeks then she just fell on her face again. That was thinking that the program had gone bad. It was about 7 yrs old.
Post Fiend
Joined: Mar 2007
Posts: 26,966
Likes: 50
From: Texas
Time to consider some bellowed up pipes, or just replace the donut gaskets back there. The exhaust gasses inside those up pipes are what spins the compressor wheel in the turbo. There's a shaft that connects that wheel, and in turn, spins the intake wheel. If you're not spinning the wheel on the exhaust side as fast due to leaks, the intake wheel isn't sucking in as much air to build boost.
Sounds like the leak starts when the pipes heat up and expand, which ends up causing your leak.
Sounds like the leak starts when the pipes heat up and expand, which ends up causing your leak.
