P0091 code

Diesel23

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Hey guys , search wasnt working for code did see one , about the harness and possible bad regulator on my hpfp , trucks running pretty good now have most all air leaks figured out , and smoke in check ,all lb settings at 0 , running hd300 mild on my blackmaxx pulled a code p0091 at half throttle truck was running fine , i have the diesel dr dual fueller set up , running 30% nozzles ,any input or something i should check or is it tuning issue ? thanks guys
 
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Diesel23

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okay i know this code is for the wire harness , in the case of a stock applicatuon , im running dual fuellers , i keep getting this code is my airdog pressure not up enough or is there a problem with the 2nd hpfp ? regulator , i only get it at half to full throtle , if i do full thorottle any other time no code
 

webb06

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Hey guys , search wasnt working for code did see one , about the harness and possible bad regulator on my hpfp , trucks running pretty good now have most all air leaks figured out , and smoke in check ,all lb settings at 0 , running hd300 mild on my blackmaxx pulled a code p0091 at half throttle truck was running fine , i have the diesel dr dual fueller set up , running 30% nozzles ,any input or something i should check or is it tuning issue ? thanks guys

Get ahold of Jeremy and see if they ever experience that code after installing their kits. He may have a fix.
 

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