Help! MAF problems

[Sethmiller]

2010 Chevy Silverado 2500HD LMM
214k Miles deleted at 194k miles
Hey guys and gals, my truck is deleted with starlite tunes and here’s my mod list
•SDP y-bridge Kit
•SDP Upper Coolant Pipe
•SDP intake/horn
•SDP Hot side pipe
•MBRP downpipe
•Magnaflow 4inch Lb7 exhaust
•PCV reroute
•Starlite Tunes w/switches
•Aftermarket Up-Pipes/exhaust manifolds
•Air dog 2 165g 4G lift pump
•Coolant Line DHD Relocation Kit

Lately I have been experiencing p0108 accompanied by either p0234 or p0299 (high and low boost codes) in the mornings when I let my truck warm up. The truck will throw p0108 and will either build max boost psi or no boost. I will limp it to work where after I clean the MAF the truck will be fine. I have put two new MAF sensors in the truck and if the p0108 code isn’t popping up, at WOT my MAF will jump to 538g/s then cut to 0g/s. After a few seconds p0103 will appear and reduce power mode. Truck will continue to run normally and after I clear the code like nothing ever happens.
MAF Idle 68-70g/s
MAF High Idle 120g/s vanes 100%
MAF 70mph 180-225g/s (depends on conditions)
This all started a couple days after putting a K&N air filter on my truck. Replaced it with a dry S&B air filter soon after, when I put the new MAF sensor in.

 

[clrussell]

Lmm?

 

[Sethmiller]

Lmm?

Yes 2010 Chevy Silverado 2500HD LMM

 

[clrussell]

Do you have your stock intake still?

 

[Sethmiller]

Do you have your stock intake still?

No I don’t, everything was fine till I put a K&N air filter on. After that I started getting p0108. Took the filter off and replaced it with a dry one and put a new MAF sensor on. Still get p0108 during high idle in the morning when first starting and p0103 at WOT

 

[clrussell]

I’ll say I’ve had more problems with Lmm and air intakes than any other motor.

if you still physically have your stock air intake, put it back on. If not find one. I’d almost bet it fixes your problem

 

[Chevy1925]

^^yup or adjust the maf scaling to the intake tube size. They are very picky.

 

[Sethmiller]

Truck was just fine

^^yup or adjust the maf scaling to the intake tube size. They are very picky.

Well everything has been on the truck since 194k miles. Only thing that has changed was that I put a K&N air filter on it. After that a few days passed and started throwing codes. Truck was just fine until I swapped my old air filter with a new K&N air filter. Now I get p0108 in the morning
Either high boost or low boost code halfway to work
Then p0103 at WOT for more than 3 seconds

 

[Sethmiller]

I’ll say I’ve had more problems with Lmm and air intakes than any other motor.

if you still physically have your stock air intake, put it back on. If not find one. I’d almost bet it fixes your problem

Truck was just fine until I put a K&N air filter on it. The intake and everything else has been on my truck since 194k miles and now it has 214k miles on it. Once I put new air filter on, it started throwing codes. Swapped my air filter to a S&B dry filter and it still throws the codes

 

[Kunz111]

Where are you getting your new MAFs from?

 

[Sethmiller]

Where are you getting your new MAFs from?

Autozone with unlimited warranty replacements. It had a hitachi before hand. I’ve also put two new MAF in it with the same problem

 

[Sethmiller]

Any idea what the sound is? I have no at first but second when the maf sensor cuts to zero

 

[Sethmiller]

Any idea what the sound is? I have no at first but second when the maf sensor cuts to zero

Source: https://youtu.be/62mXct7I7es