boost problem!!!!!!!!!! - Ford Powerstroke Diesel Forum
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Old 07-22-2010, 07:19 PM
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boost problem!!!!!!!!!!

01 7.3l dp tuner, 38r, exhaust. the truck only builds 23lbs of boost. it builds super fast to 23 and holds there like the wastegate is blowing open. the wastgate hose is unhooked. i tried a big head wastegate i had, same problem. when it gets to 23lbs the ses light comes on its a p0238 code. i tried a new map sensor just because. it didnt help. someone has to have had this problem before. thanks for any help!
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Old 07-22-2010, 07:24 PM
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Sounds like a boost leak?
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Old 07-22-2010, 07:47 PM
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I was wondering the same thing actually. I've got an intake, exhaust, and php tunes. Even on the 100hp setting I get 20-25 psi boost. Prob is, I don't know if thats normal or not. Sounds similar to your truck but I've seen and heard of guys getting more than that with just an intake, exhaust, and tuner, so I wonder... My cel has never come on though.
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Old 07-22-2010, 08:07 PM
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the computer defuels when it sees 23-25lbs. you need a boost fooler or so.
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Old 07-22-2010, 08:53 PM
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Quote:
Originally Posted by ogrehauler View Post
the computer defuels when it sees 23-25lbs. you need a boost fooler or so.
Yep, i agree.
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Old 07-27-2010, 05:53 PM
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well i have an f5 tuner from dp tuners doesnt that take care of the defueling problem
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Old 07-27-2010, 11:07 PM
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depends if you asked for that tune from jody

where are you getting the boost pressure reading from?

if you want to make a cheap boost fooler then you can get a air pressure regulator for a compressor and set it to 22psi inline from the intake to the map sensor.
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