SAFC Air Flow Percentage bounces when the car breaks up, helppp, new clues.

Discuss topics related to the CA18DE and CA18DET series engines.
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KEMP
Posts: 371
Joined: Sun Nov 02, 2008 7:23 pm
Car: 1990 240sx CA18DET

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so its still breaking up, but today i looked at the "AFL" meter option on my safc, and decided to watch my air flow while in boost, and to see what it does when the car starts to break up/miss/studder.

it sits at 40% almost exactly without anymovment, even when in boost, until it starts to break up, whn it breaks up the needle bouces over 40% super fast like waving your finger fast in front of your face, it just shakes around the 4 on the gauge and then stops wehn you let off.

does this mean something is up with my maf? making it read funny causing it to miss at a certain RPM/ boost pressure?

if the air flow percentage is shaking, while the car is missing, is the maf causing the miss? or is something else making the maf shake around?

thanks a ton


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