Quote:
Originally Posted by NoHaveMSG
Then drive the car for a while longer and see if the trims settle, depending on your driving it takes around 100 miles. IAM=Ignition advance multiplier, it is just advance multiplier on the OFT menu.
One of the threads I found searching “BRZ Mishimoto CAI scaling” was a thread from him talking about it needing some tweaking so  Even the OFT base maps took some maf scaling on my car with a stock intake. If you are going to spend all that money on mods why not take the time to log it and make sure everything is good. Reading your first post it did not seem like your fuel trims were good and it “sudden needing rescaling.” I thought you said it was -5% after installing new parts and then you reflashed and it went off further.
It seems like you are looking for an answer you want to hear and not actual help. |
It’s a little off but like I said basically stock. Which would be completely safe to drive on like -5 at idle is. And I had -5 at idle for a long time until about a week after installing new UEL headers. Now I have -13.6 and a rough idle quite literally out of no where. For several days after the UEL Header install the fuel trims sat around -5 to -7 at idle constant. And reflashing isn’t when I saw it get worse. I reflashed hoping to fix it and it didn’t. I understand I should maf scale to get the best fuel trims, but What I’m asking is what caused it randomly to start sitting at -13.6 to -16.5 at idle and have idle issues when it should have about the same or like you said a little off of stock? I don’t see -16.5 as a little off of stock and something must be wrong right? Idk I don’t mean to be a **** or ignore your advice. I’m just a little paranoid and scared of damaging the car. I tried rescaling it myself and struggled could anyone help me?
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