P2188 - The source of the problem

Speedhunter

Speedhunter

Greenie N00B Member
When I'm in 1st, 2nd or 3rd gear at part throttle my AFR drop to 9 and the car struggle and I bounce front and back in my seat because the car buck.

I'm in process of tuning with Alex from Stratified and in 4th gear at WOT the car seem super fine for him

Here some log attach ... but you can't see LTFT and STFT because I'm in process of tuning with Stratified
 

Attachments

Are you on a k04 and stock fuel system? Your MAF is maxing out which is bad. Did you get a replacement at any point?
 
I can't say that for sure but there's 0 reason you should be maxing out the maf on a k04.

Some of the autoparts stores sell mafs they say fit our cars, but the voltage pegs way too soon.
 
+1 on checking out your MAF sensor, should not be maxing it out even with stock diameter intake.

The bucking is probably from your KR making your car go way too rich. I kind of have the same issue with false knock and my part throttle logs look exactly like yours. I don't have any KR at WOT though.

I tuned out the knock at low throttle positions, but don't think you should since you have knock at WOT as well. Not a good idea to tune out the KR until you figure out what is causing it. Do you have the same KR whenever you did your 2nd gear low throttle mafcal logs

Also did you have knock on your base map WOT runs?
 
andale927 said:
+1 on checking out your MAF sensor, should not be maxing it out even with stock diameter intake.

The bucking is probably from your KR making your car go way too rich. I kind of have the same issue with false knock and my part throttle logs look exactly like yours. I don't have any KR at WOT though.

I tuned out the knock at low throttle positions, but don't think you should since you have knock at WOT as well. Not a good idea to tune out the KR until you figure out what is causing it. Do you have the same KR whenever you did your 2nd gear low throttle mafcal logs

Also did you have knock on your base map WOT runs?
Click to expand...

Yes same KR ... like you said ... I'm sure it's false KR and the low KR I have during WOT I'm in process of tuning with Stratified right now my tune is not finish
 
But tonight I remove the MAF clean it ... change the oring for a new one ... and right now the value change a lot at IDLE

my STFT are lean a lot +20 / 24 and my LTFT just drop ...

I try to move the cable from the MAF no variation
 
Yep a complete new car.

No more struggle in any gear.

And my STFT, LTFT change completly ... So now im lean around 15

So definitly a MAF problem

I will Wait 50km to be everything is settle and i Will Do a MAF cal

thanks Everyone for your help

Envoyé de mon ONEPLUS A6013 en utilisant Tapatalk
 
Fun fact, I got 2 duralast MAFs in a search for my issues. 1st was actually Bosch, lasted 2 months, failed. Returned, one I got? Mazda OEM inside.
 
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