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post #1 of 13 Old 08-21-2013, 09:51 PM Thread Starter
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good boost not much power

My truck is a 08 f350 srw. Cold air intake,egr block off plates and hose reroute, and canned sct offroad tunes and 35x12.5x20 tires. 150,000 miles
I have noticed lately a lack of power low and high speeds. Boost seems to act normal and will still get in the 30+ range when under heavy load.
truck does puke under load but idles and drives great. Just doesn't have the kick in the pants it use too. Feels almost as if I am running the stock tune or less.
I have talked with sct and they say my runner and tunes seem to be fine.
Any help would be great.
Thanks
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post #2 of 13 Old 08-22-2013, 07:54 AM
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Just a thought. I keeped throwing an EBP code and thought it was the sensor. Come to find out....even though the truck was holding 45psi under hard power it should be around 50 and i noticed a hissing from the rear left of the engine and it's getting louder from the EGR down pipe to my EGR coolers that I deleted and did a block off was leaking at the flex tube. Check for boost leaks. My 08 has 140K. I'm going to take out that pipe and relocate the EBP sensor using the existing block off plate.

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post #3 of 13 Old 08-22-2013, 08:05 AM Thread Starter
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I don't have any codes. And I replaced the ebp sensor.
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post #4 of 13 Old 08-22-2013, 11:50 AM
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Check for boost leaks around the couplers and the flex pipe on the back of the engine that goes down to your EGR cooler.

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post #5 of 13 Old 08-22-2013, 12:11 PM
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Puking what under load?
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post #6 of 13 Old 08-22-2013, 10:27 PM Thread Starter
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Pukes coolant from reservoir
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post #7 of 13 Old 08-23-2013, 06:09 AM
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What's your engine temp under load? Puking coolant out your degas can be a sign of a blown head gasket. I'm not saying you do just keep it in mind. If you can't find any air leaks in the boost system, check your MAP, EBP sensor, and tube. They usually get plugged and fouled with soot/oil.
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post #8 of 13 Old 08-27-2013, 07:20 PM Thread Starter
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If I am still seeing 40psi boost could I still have a turbo leak big enough to be noticeable? I thought if a flex pipe or other was leaking that I would not have good boost.
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post #9 of 13 Old 09-01-2013, 04:40 PM
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You would hear a boost leak. After deleting my EGR i didn't remove the up pipe just blocked it off and the flex pipe for the up pipe started hissing. This noise was under load and not under load.

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post #10 of 13 Old 09-03-2013, 07:13 AM
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Hate to say it but puking under load is one of the main signs of blown head gaskets. You may want to have the dealer take a look at that or put a gauge on the cooling system and check it under heavy load. If you keep putting loads on that engine with a blown head gasket you're going to cause more damage and it will be even more $$$$$.


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