Cooler weather - tune change? MAFT

[Bouche Dag]

The past few days its been cooling off here in Detroit and I noticed the other day while cruising that I was getting 3 counts of knock and my lft count was near 120%.

I was worried because the car never knocked before and my fuel trims have always been ~8% from 100.

I did a wot pull and sure enough I got 8 counts of knock. Yikes!!! Sorry 4G63. I pulled over and adjusted two clicks richer on my maft and viola. No more knock... Car feels a little slower now but that could all be in my head.

My question is - you guys running the maft setup, do you have to adjust according to the season? Thanks!

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[92AWDHX40]

I ran mine all year round once and i didnt have to change a thing, some say the maft is funny in certain weather but i havent had a problems when i used it.

 

[snowborder714]

I remember getting varied readings when the weather changed (temperature and humidity) when I was still running a GM MAF. I don't remember getting anything that extreme though.

 

[Bouche Dag]

Hmmm... Maybe my tune was just starting to "settle" or something and needed some fine tuning.

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