boost problem!!!!!!!!!!

[01stroker21]

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!

[PahStroke]

Sounds like a boost leak?

[e99f2506sp]

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.

[ogrehauler]

the computer defuels when it sees 23-25lbs. you need a boost fooler or so.

[Zander's 5.8]

Originally Posted by ogrehauler

the computer defuels when it sees 23-25lbs. you need a boost fooler or so.

Yep, i agree.

[01stroker21]

well i have an f5 tuner from dp tuners doesnt that take care of the defueling problem

[Phiber Optik]

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.