New engine, throwing P0103 MAF high frequency code?
Thread Starter
Burning Brakes
Joined: Mar 2012
Posts: 877
Likes: 6
From: Cherry Hill NJ
New engine, throwing P0103 MAF high frequency code?
Just fired up my new engine tonight. Ls6 with Texas speed 228r cam and kn filter. Engine ran ok little bouncy at idle when coming off throttle input but then settles down. Throwing a p0103 code maf high frequency. Changed out to a brand new Texas speed 100 mm maf, throwing same code. Any ideas? Maf plug getting ground on black, 5v on yellow, and alternator voltage on red.
Tia
Tia
Racer
Joined: Dec 2006
Posts: 4,434
Likes: 18
From: Braselton GA
make sure your wire harness to the MAF connector isn't too close to the servo on the TB, it should run under it (and stay spaced away from it as much as you can).
does it do it with the stock MAF?
does it do it with the stock MAF?
Thread Starter
Burning Brakes
Joined: Mar 2012
Posts: 877
Likes: 6
From: Cherry Hill NJ
I'm a little confused. I called Doug at ECS (they put the base tune on my PCM) and he is telling me that the MAF sensor 3 wire plug should read 5v each on the outside wires, and ground in the center. I have alternator voltage on the pink wire, and 5v on the yellow wire. According to the Chevy diagram, this is correct? The pink wire gets full ignition power, or am I reading it wrong?
