I am very sad that I still cannot get this problem sorted after a few months. The new MAF 996.606.124.00 I bought from dealer was scratched on the metal film. Faulty MAF pics attached. Now back to the old MAF 5+ yrs old

Repairs done
Throttle body cleaned
Replaced vaccum hoses on top of DVs, metal Y-pipe, the stock solenoid.
New stock spark plugs
Replaced the 4 turbo and intercooler hoses (car reaches target boost, no power loss at all)
Stock hollow wheels n tires

Symptoms
1. Abs/psm ONLY comes on whenever there is a small bump, read with durametric, P0102 Hot film
2. Engine rev dropping below 800rpm @ idle (tuner states it should be 800rpm steady) 3. Above 70kph (~44mph) the abs/psm NEVER comes on.
4. Clear code with durametric, P0102 always comes back.

To sum up the symptom, the car drives perfectly as long as there is some throttle or at WOT. There is no boost leak or power loss. It sits at 1.1 bar at peak boost and no CEL or any irregularities. Problem only takes place during town driving.

Possible issues
1. MAF
2. vacuum leak on the intake side
3 …

Can the car possibily have any other possible issue?

 

The one thing you forgot to replace is the MAF sensor lol. Order it at autoatlanta.com for 200.00 bucks and way you go. Hot film = MAF Sensor............

 

I bought one from a local bosch authorized dealer but it was faulty. so now i really want to make sure i could solve the issue before i go out to buy another one.

 

Hot film means your maf is bad.

 

agreed. dollars to doughnuts you have a faulty maf. replace with a new bosch. part 124. should do it. if not? well, you needed one anyway.

 

Agreed get a new MAF.

 

make sure you try literally everything else before the MAF. Hot Film = make a sexy movie about how you changed everything in the car except the Mass Air Flow sensor.

 

Thanks for all the replies, really appreciated

To sum up the issue, as long as the engine rev is above 2000rpm or provided that I have some throttle input, no abs/psm light will ever come on even when the car hits a bump. The car drives perfectly only has the annoying abs/psm issue during idling and city driving. I datalog some normal driving and 3rd &4th gear pulls and my tuner thinks they are absolutely fine. Does this suggest it is some kind of boost leak on the intake side?

 

Smoke test the car. remove the air box and smoke it through the intake. Use the tube the airbox was attached to.

 

Do a search on MAF sensors thats what happens when its bad. Abs/Psm come on most of the time when your MAF sensor is bad.

To test unplug the MAF sensor and drive it to see if it cures. If it does then there you go.

 

Assuming everything else is fine, if I pull the MAF, will the car run normal without the abs/psm? Is it not advised to test run the car with boost while the MAF connector is unplugged?

 

Dont worry you will get a psm/abs code but your hesitarion and hot film will not come back. Just order a new maf i had the samething happen to me and it was fixed. Cleaning it will not help because its already fried so go to autoatlanta or call them its 200.00 bucks.

 

I will report back after I pulled the MAF. thanks again for the help.

 

I think you may check plug under steering wheel it's brake plug or something, i had this issue before and it wad pain in A$$ to figure it.

 

Fasoole, thank you for your reply. If I see no flickering or irregularity with all 3 brake lights and that the abs/psm never comes on during braking. Can I rule out the issue with the brake plug?

Thanks again