Have to bail on Goblin plans

[nody]

Hey all,
I'm unfortunately having to give up on my plans to order the goblin kit.
I've been holding a '09 turbo for about 4 years, but recently I've gotten the dreaded P0101 MAF code.
Honestly, I am just trying to sell the car at this point, but I'm doing my best to get this code correct so that I can sell it in the best shape possible.

Curious if anyone ran into an issue similar and any recommendations.
Essentially car runs/drives without issue; however, after about 3-5 minutes I get the P0101 MAF code and it won't build boost. If I clear the code, it runs fine for 3-5 minutes until it occurs again.
I've had the car in the shop 4 times now.
-They did a smoke test, no leaks.
-Intake shows no issues.
-No split wires/ bad fuses
-Changed out the MAF.
-Replaced wastegate actuator/kit
The shop has essential given up and I'm running out of resources.
Car has injen intake/charge pipes, aftermarket intercooler, and Trifecta tune. All other maintenance has been kept up to date.
Any help/recommendations much appreciated. Eventually I may post it up on the classifieds.
Thanks all.

 

[Stretch2126]

Did you try the stock tune file to rule that out at least?

 

[nody]

Did you try the stock tune file to rule that out at least?

Technically, no. I purchased the car with the modifications and tuning already on. I believe it's a flash tune, but doesn't alter mapping until put into competition mode. Fair point though, but the issues occurs regardless of whether in comp mode or not.
I can mention too, this issue came about without warning. Nothing changed or was replaced prior to the issue starting.

 

[Stretch2126]

You said it runs great for the first few minutes so I’m assuming if the tune is good the it should be mechanically sound. Is it 5 minutes after starting cold or just any time? It’s not impossible for the ecm to have an issue but I don’t think it’s common so I wouldn’t jump straight to that.

 

[nody]

You said it runs great for the first few minutes so I’m assuming if the tune is good the it should be mechanically sound. Is it 5 minutes after starting cold or just any time? It’s not impossible for the ecm to have an issue but I don’t think it’s common so I wouldn’t jump straight to that.

Correct. Essentially, anytime I reset the code, it will run without issue for roughly 3-5 minutes. I've tested in all different kinds of scenarios, and it's just random. You can be idling, full throttle, cruising at 30mph, with cruise control on at 75mph, under braking, on acceleration, it will occur regardless of driving conditions within 3-5 minutes. I reached out to Trifecta performance to see if they have an idea.

 

[neodied]

P0101 is a Performance/Rationality type of DTC which usually involve two or more separate but related signals being checked against each other to make sure they match.

P0101 in particular compares measured MAF against a calculation of expected airflow from the throttle angle and engine speed. It also requires a big error in LTFTs or disagreement with another calculation based on MAP. Do you have any data logs with LTFT and MAP?

The reason it won't set immediately after code clear is there are enabling conditions (engine coolant > 10 degC and LTFT stable).

 

[nody]

P0101 is a Performance/Rationality type of DTC which usually involve two or more separate but related signals being checked against each other to make sure they match.

P0101 in particular compares measured MAF against a calculation of expected airflow from the throttle angle and engine speed. It also requires a big error in LTFTs or disagreement with another calculation based on MAP. Do you have any data logs with LTFT and MAP?

The reason it won't set immediately after code clear is there are enabling conditions (engine coolant > 10 degC and LTFT stable).

I do not have equipment that would garner that information unfortunately, maybe LTFT but not full detailed data logs.
I have a fairly basic obdII scanner that will show live data, I caught in real time when the code tripped. What I captured was a sudden large spike in the MAF g/s, nearly simultaneously the code trips. This occurred at around 70mph with cruise control on.

The shop that I had investigate the issue, reported something fairly similar I would say. They said the computer was 'looking for' and/or 'expecting' different values from the MAF than it was getting. Their recommendation was to put the stock intake back on. While I'm not in a position to argue with that assessment, I don't know how this would have happened randomly after 4 years of no trouble.

I think half the battle here is there is nothing to test per se. There doesn't seem to be a physical issue driving the electrical fall out.