AEM F/IC MAF Clamp

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Jan 22, 2010 | 06:18 PM

#21

johnhawkins

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From: Buffalo, NY

hey thanks man - I guess it will be trial and error as with ever modification - Ill be tuning in April so ill let it be known

Jan 22, 2010 | 07:04 PM

#22

ScionFred

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You're welcome and good luck with the ebay build. Most of my turbo setup came from ebay as well.

Feb 8, 2010 | 08:23 PM

#23

Mach-box

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Quote:

Originally Posted by ElevationTC

What was voltage on your XB before turbo?

This is the info that you need! Also what are your fuel trims?

Let me give you this example! Yesterday i tuned a car using a OEM air box. I changed maf to percent and set all zero's. I went into aem fic settings and put max voltage clamp to 4.40.

This was a 07+ I tuned the car and i was amazed at how smooth it was. Idle stayed pretty much between 14.6-14.8 I was able to tune the afr to a complete flat line during data logs.

Does this mean your MAF table is all zeros? and you just clamp in the setup? I am just a little confused.

Feb 9, 2010 | 01:09 AM

#24

ScionFred

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Quote:

Originally Posted by Mach-box

Does this mean your MAF table is all zeros? and you just clamp in the setup? I am just a little confused.

That's what I understood him to mean. If you try it, make sure you change the MAF map from voltage to percent and then just clamp the maf at 4.5V in setup. It didn't work for me (P0101) but it might work great for a different setup.

I'm 100% convinced that fuel trims contribute to the P0101 code. IMO, the ECU assumes stock injector size and expects a corresponding volume of air to acheive a given AFR. If the MAF reads more air than the ECU expects based on fuel trim and a host of other variables, "Maf out of range" results.