Sudden Boost Drop
Cargo Master
Joined: Apr 2004
Posts: 3,162
Likes: 1
From: Vilonia Arkansas
When my truck defueled because of over boost I still had power not as much but I had some and some boost to it never went all the way to 0. Pull the red line off your waste gate and put on the stud of the IC clamp and give it a run and see if if it does it again.
Gone Fishin for Mark
Joined: Nov 2004
Posts: 1,354
Likes: 2
From: West of Houston
The intercooler clamps. They are the clamps that hold the blue silicon hoses on the metal tubes. The pressurized air from the turbo flows thru them, thru the cooler, then back to the intake. If you are losing pressure you are losing boost. Same thing.........
Last edited by joegebff; Jul 6, 2008 at 07:12 PM. Reason: typos
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
the inter cooler tube running from the turbo to the inercooler have 2 rubber boots on both tubes...them boots are held on with what looks like hose clamps.. IC= intercooler
Post Fiend
Joined: Jun 2006
Posts: 9,714
Likes: 2
From: White Mnt's,New Hampshire
I'm too slow..ruff weekend..
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New User
Joined: Jan 2007
Posts: 22
Likes: 0
By taking the wire off of the waste gate, does that fool the system so that it doesn't defuel and/or open the waste gate? Can this wire be left off all the time?
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Brett Foote
Lead Driver
Joined: Jun 2007
Posts: 7,760
Likes: 27
From: Hampton, Maryland.
If it is a defueling issue and not a waste gate opening and bleeding off your boost, then yes, the truck will still defuel. They are trying to make sure your wastegate isn't opening and sticking.
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New User
Joined: Jan 2007
Posts: 22
Likes: 0
Ok. I took off the tube to the wast gate and put it on an IC clamp. I then went for a drive and put my foot into it. The pressure drop is at 15 psi, but my rpms stay up. I'm going to go change the oil and see what happens.
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New User
Joined: Jan 2007
Posts: 22
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I want to thank everybody for their help. I changed my oil and the problem has gone away. I went full throttle up a big hill and held at 25 psi without a problem. I guess the high pressure fuel system doesn't like old oil. I can only assume that because I had about 13,000 miles on the oil that the anti foam properties had depleted which led to the fuel/turbo problems.
Now this brings on a whole another topic as far as extended oil changes on Fords because of their oil fired injectors. In case anybody cares, I was using Amsoil Synthetic 15W-40W with their oil bypass filter system. I just replaced the filters and refilled with Delo 400LE 15w-40w. I have 96,000 miles on the truck and the synthetic was leaking out and I was using oil at about 1 quart a month or about every 1,600 miles. I'm hoping the leaking oil and consumption will reduce with the dino oil. Take care everyone.
Now this brings on a whole another topic as far as extended oil changes on Fords because of their oil fired injectors. In case anybody cares, I was using Amsoil Synthetic 15W-40W with their oil bypass filter system. I just replaced the filters and refilled with Delo 400LE 15w-40w. I have 96,000 miles on the truck and the synthetic was leaking out and I was using oil at about 1 quart a month or about every 1,600 miles. I'm hoping the leaking oil and consumption will reduce with the dino oil. Take care everyone.
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