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Discussion Starter #1
Now :wtf1:. Having problem with truck getting P0234 "overboost" code while driving at freeway speeds. Code came up with only 6lbs boost. Has anyone else had this problem? This happens all the time when programmer is on any setting but stock.
 

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its normal, you will have to by a boost valve from ppe or some other vendor in order to trick the computer.
 

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Discussion Starter #3
Doesn't a boost valve from PPE increase boost, how would this trick the computer?
 

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Discussion Starter #5
I did see this PPE boost valve but didn't want to increase boost untill problem is fixed, however i just placed order for one. I'll give it a try. I have the Banks "Big head waste gate" that probaly does the same thing. I had it on this truck about 2 years ago but took it off because of this "overboost code" condition. I couldn't seem to get it dialed in corectly.:rolleyes:
 

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the banks big head isn't designed to eliminate the overboost code. it allows you to build boost quicker by replacing the stock unit which prematurely, so to speak, releases not holding the boost.
 

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EFI works fine too.
 

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wondering what programmer your using ?? Sounds like your setting the boost ? Right ?
 

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Your lucky. I get them every once in a while. i run 30psi. i keep the scanner with me to clear them out.
 
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