I recently installed an AFC and when the car gets around 5K rpm, it sounds as if the car is hitting the rev limiter/fuel cut. The settings are 45 lo and 70 hi and the settings gradually increase to -9 at 7K rpm. What would cause this problem? And also, the car seems to idle higher than before. I noticed if you disconnect the air flow sensor from the AFC and hook them back together, the car idles back down to where it needs to be.

And also the car has the SES light on. I checked my install and even had my friend double check it. Any ideas?!?

Sorry about double posting, this is really annoying me...

 

There is some good info here:
https://www.evolutionm.net/forums/sh...threadid=44801

 

Could be fuel cut. Is it cold where you are? I am hitting fuel cut with my MBC set to ~20 psi, so I've since turned it down.

Good luck,

FB

 

Do you have the unit set to karman freq. ? And is this a s-afc or s-afc II?

 

It is cool here, but I watched the boost gauge and it doesn't get above .5 bar when you hit the wall so to speak.

And the car is set to Karmann, 4 cyl and up arrow. AFC, not 2.

 

Check the other post higher up in this link.. I replied to this problem and similar ones already..

 

I saw it Jack, just replying to both posts. I am slowly figuring it out thanks to you guys. Got another reply in the above post.