LB7: keep getting maf codes when I go up a certain hill

[MuscleTruck03]

Ok I am getting annoyed, for some reason almost every time I start into the canyon on the way home from my ladies house my maf code goes off, every time it happens in the EXACT same spot! I can drive all over and nothing happens but as soon as I start up that certain hill it trips it Ive pulled the maf and cleaned it a couple times and reset everything and I still get it in the same spot. Any ideas why THAT spot and how to fix it?

 

[The Neens]

do u think it's altitude related??

 

[MACKIN]

My 01 throws a Maf code every once in awhile also. Could be tuning could be location of the Maf sensor . You've ruled out it being dirty. My case I believe it's in the tuning. There is no rime or reason why mine does it but I know when I was running a certain tune ( a downloader style) it did it all the time years ago.

I would think that with EFI you could change the parameters so it no longer does it. Someone who knows EFI could tell you I cannot.

 

[MuscleTruck03]

chris I wondered that but I would think it would do it on the way up there too (kinda go over a mountain) I did just clean my filter a month or so ago and the stupid oil on the filter always messes with them so I figured cleaning the maf a million times now I'd be good. I thought maybe it was sucking some of the filter oil from running 10+ psi all the way up the hills but that should do it on the other hills too... just weird that it only does it in that exact spot

 

[DAVe3283]

Maybe try logging the next time you drive there, and see what happens. Also, did it store a freeze frame? That might shed some light on what happened too.

 

[MuscleTruck03]

I'll have to log it next time I drive through there, and the light turned back, I guess it should still pull the code?

 

[DAVe3283]

Yeah, you can dump the code and freeze frame data with the FlashScan V2. Then look through the resulting text file and see what looks odd. It would be easier with a full log, but this could get us started.

I think the option you use is "save all diagnostics" or something, under the diagnostics (or scan?) menu. Man, I can't remember right now. If you can't find it, I'll look tomorrow night for you.

 

[LarryJewell]

in your tune set all cells in B0806 to "65000" and C0903 to "65000"

 

[MuscleTruck03]

thanks guys, I made those changes larry thanks for the tip!

 

[LarryJewell]

thanks guys, I made those changes larry thanks for the tip!

did they help the problem

 

[TrentNell]

did they help the problem

X2 ? Let me know if you need a hand Jason .

 

[MuscleTruck03]

I'll find out tomorrow, there was supposed be a "huge blizzard" today so I'm going up tomorrow instead