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MazdaSpeed 3/6 - ECU Computer Tuning Have an ECU tuning issue? Do you want to discuss Mazdaspeed 3/6 tuning solutions? Up to date info on the latest! Piasini Reflash, Cobb Access Port, Xede, Procede, Standback, Superchips & others supported here!


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 Old 04-11-2019, 12:35 PM   #1
 
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Default Help with KR and rich AFR

I have a tune from stratified and I am running very rich with up to 5.25 KR. My mods are high pressure fuel pump, corksport TMIC, 3 inch intake, ATP catless downpipe, and cobb BPV. Please help with some possible solutions to my knock and rich AFR. I am going to do one step colder plugs this upcoming weekend. Thanks!

https://datazap.me/u/connor-schlag/l...og=0&data=4-22

this is another log I took the next day and the Knock is a little better, still running rich on WOT.

https://datazap.me/u/connor-schlag/l...og=0&data=4-22
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 Old 04-11-2019, 01:42 PM   #2
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So...uh...if you're having significant consistent knock at WOT, you should probably stop going WOT.

Basically, when the knock sensor reports knock to the ECU, the car dumps extra fuel into the mixture to try and cool the cylinders and reduce or eliminate the knock that is being sensed. Accordingly, datalogs of a WOT run where you have consistent knock throughout the pull will show extra fuel being dumped into the mixture and high/rich AFRs.

You might want to try putting a couple of gallons of E85 in the tank to see if you've just got a tank of bad gas.
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 Old 04-11-2019, 02:00 PM   #3
 
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Originally Posted by Vansquish View Post
So...uh...if you're having significant consistent knock at WOT, you should probably stop going WOT.

Basically, when the knock sensor reports knock to the ECU, the car dumps extra fuel into the mixture to try and cool the cylinders and reduce or eliminate the knock that is being sensed. Accordingly, datalogs of a WOT run where you have consistent knock throughout the pull will show extra fuel being dumped into the mixture and high/rich AFRs.

You might want to try putting a couple of gallons of E85 in the tank to see if you've just got a tank of bad gas.
Okay, I will try putting a few gallons of E in the car. Do i need a tune for 2 gallons? Or can i dump it in with the rest of 91 and run it on my current stratified tune? Thanks in advance.
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 Old 04-11-2019, 02:13 PM   #4
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You should be fine with a couple of gallons.
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 Old 04-16-2019, 07:15 AM   #5
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Any updates?
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Originally Posted by 06Speed6GT View Post
I have a tune from stratified and I am running very rich with up to 5.25 KR. My mods are high pressure fuel pump, corksport TMIC, 3 inch intake, ATP catless downpipe, and cobb BPV. Please help with some possible solutions to my knock and rich AFR. I am going to do one step colder plugs this upcoming weekend. Thanks!

https://datazap.me/u/connor-schlag/l...og=0&data=4-22

this is another log I took the next day and the Knock is a little better, still running rich on WOT.

https://datazap.me/u/connor-schlag/l...og=0&data=4-22

Have you talked to stratified? What type of fuel are you running. Timing doesn't look aggressive nor does boost. Boost temps weren't too bad.

Like others have said try a couple gallons of e85 and see if that eliminates the knock.
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