Expected maf result for S3 8L with stock k04-023

[P1LAYA-ZN]

Good day gents,
Just wanted to know what some of you guys are getting.
I checked my car on vcds yesterday, and at the coast in durban I see a max of 160g/cm3, and this with a Cai, without the airfilter this value goes up to 180 g/cm3..... Is this low? I was under the impression I should be seeing above 200g/cm3 but also, this maf has never been replaced. The car feels much more livelier without the filter so I can only imagine how it would feel with even higher maf readings. Just wanted to know if it's time to replace this sensor.

[Killerwatt]

That is low, especially for the coast.
Check block 032 for fuel trims and also check if you are meeting requested boost in yhe upper rpms.

[P1LAYA-ZN]

What exactly will I be checking for here?

[P1LAYA-ZN]

Can it be related to software at all? Car has a mild tune and boosts 1.3bar.
How would I know if it's definitely the sensor that's not performing at its optimum.
I wouldn't wanna replace the sensor if I still get the same Low values and perhaps there is some other issue.

[Killerwatt]

Block 032 shows fuel trims. Close to 0% is ideal but up to 5% is fine. High trims can point to either injector or maf issues.

If the actual boost deviates from requested with the n75 duty cycle at 100%. Then something could be wrong.

If you are unsure how to interpret the logs then post the graphs here. Do a 3rd gear pull to redline and graph values in excel.

[Pynoxim]

With my broken K04-023 at the coast I was seeing a peak of 216g/s on a 3" MAF Housing that was at 1 bar

[P1LAYA-ZN]

Thanks guys.
Still trying to figure out if its definitely the MAf thats faulty.
Got a price of ~ R1720 + Vat
Are these sensors available without the Maf housing or is it sold as a complete unit only ?

[ICE King]

Have you tried cleaning it?

[P1LAYA-ZN]

Not yet.
Can I use an electrical cleaner or even isopropyl alcohol to clean the sensor?
I know these sensors are very delicate, is there a right way of doing it?

[ICE King]

Yes , either of the two will work - just make you don't use something that would leave residue o the sensor - like oil/silicone based products.

Remove, Clean , Leave to dry - Reinstall

[chucker02]

Carb cleaner also works lekker

[ICE King]

Carb cleaner also works lekker

I actually used carb cleaner to clean mine but didnt want to mention it as there are a few biased opinions about it on the forum.
Cleaned it more than once and had no issues.

[chucker02]

Carb cleaner also works lekker

I actually used carb cleaner to clean mine but didnt want to mention it as there are a few biased opinions about it on the forum.
Cleaned it more than once and had no issues.

Agreed, but most of the time its because someone read something on some website and then decided its bad for the MAF

[P1LAYA-ZN]

Just called Barons out of curiosity to get a price, only to get the shock of my life to hear its R7555 + vat
Diesel Electric is R1720 + Vat

[ICE King]

Just called Barons out of curiosity to get a price, only to get the shock of my life to hear its R7555 + vat
Diesel Electric is R1720 + Vat

Crazy and it's probably the exact same thing - Bosch with same part no's.

Anyway, It's a delicate part , be careful when cleaning it - should've cleaned it before you found out it's price

[ICE King]

Carb cleaner also works lekker

I actually used carb cleaner to clean mine but didnt want to mention it as there are a few biased opinions about it on the forum.
Cleaned it more than once and had no issues.

Agreed, but most of the time its because someone read something on some website and then decided its bad for the MAF

Agreed there's all kind's of stories on the net about cleaning MAF's , was skeptical at first but did it first hand since no one could give me an exact answer , pleased to say the carb cleaner did more good than harm

[P1LAYA-ZN]

Carb cleaner also works lekker

I actually used carb cleaner to clean mine but didnt want to mention it as there are a few biased opinions about it on the forum.
Cleaned it more than once and had no issues.

Agreed, but most of the time its because someone read something on some website and then decided its bad for the MAF

Agreed there's all kind's of stories on the net about cleaning MAF's , was skeptical at first but did it first hand since no one could give me an exact answer , pleased to say the carb cleaner did more good than harm

Did you manage to get higher Airflow readings after cleaning the MAF , if so how much higher ?
The reason I ask, is I was told by the Tuning company who did my Software that, on a Brand new stock K04, I should only be seeing a max of 190g @ the coast. This contradicts what I've read up so far.
I will give cleaning the MAF a try though.
Still unsure whether I will fork out 2K for a new MAF, that may well still give me the same low result.

[Killerwatt]

Your tuning company is wrong.
Did you check block 032? This is the easiest way to confirm maf operation.
For cleaning the maf, grab a can of electronic parts cleaner from builders.

[ICE King]

I actually used carb cleaner to clean mine but didnt want to mention it as there are a few biased opinions about it on the forum.
Cleaned it more than once and had no issues.

Agreed, but most of the time its because someone read something on some website and then decided its bad for the MAF

Agreed there's all kind's of stories on the net about cleaning MAF's , was skeptical at first but did it first hand since no one could give me an exact answer , pleased to say the carb cleaner did more good than harm

Did you manage to get higher Airflow readings after cleaning the MAF , if so how much higher ?
The reason I ask, is I was told by the Tuning company who did my Software that, on a Brand new stock K04, I should only be seeing a max of 190g @ the coast. This contradicts what I've read up so far.
I will give cleaning the MAF a try though.
Still unsure whether I will fork out 2K for a new MAF, that may well still give me the same low result.

To be honest,since it was boosting just as hard after I cleaned there was no reason to check and can't remember the last figure the last time the car was logged.,

Cleaned as part of normal maintenance since I was working in the TIP area.