Hey whats up please need some feed back. I have a 2010 evo x gsr. My curret mods are kelford 214 b cams ets intercooler with lower piping agency uicp ets intake tial 50mm bov ferrera valve train ets down pipe with a tomei ti expreme exhaust.
Before my tune I never had an issue before these mods. Now mods plus tune I'm having mass air flow sensor keeps poping up also car hesitates at 5k . I'm also running stock turbo at 26 psi on pump gas. These r the codes I'm getting p0101 mass or volume air flow a circuit range performace also code p2096 post catalyst fuel trim system too lean bank 1. After swaping for another oem mass air sensor still having issue. Is it a mod or my tune? Please help

 

I just got the p2096 code couple days ago and it turned out to be one of the gaskets at the test pipe and downpipe flange connection. Go underneath the car and start your engine start looking for exhaust leak first.
This is what my gasket looked like
at the test pipe downpipe connection.

 

The exhaust leak is most likely your exhaust code. Here is the description for the other code via Tephra

DTC P0101: mass airflow circuit range/performance problem:

CIRCUIT OPERATION
•The mass airflow sensor power is supplied from the MFI relay (terminal No. 2), and the ground is provided on the ECM (terminal No. 88).
•A voltage that is according to the mass airflow rate is sent to the ECM (terminal No. 87) from the mass airflow sensor output terminal (terminal No. 3).
.
TECHNICAL DESCRIPTION
•While the engine is running, the mass airflow sensor outputs electric current which corresponds to the mass airflow rate.
•The ECM converts the electric current into the voltage and checks whether the voltage is within a specified range while the engine is running.

Check Conditions
•Throttle position sensor output voltage is 1.0 volt or lower.
•Mass airflow sensor output voltage is 4.9 volts (corresponding to an air flow rate of 387 g/sec) or lower.
Judgement Criterion
•Mass airflow sensor output voltage has continued to be 3.5 volts (corresponding to an air flow rate of 119 g/sec) or higher for 2 seconds.

Check Conditions
•Engine speed is 1,500 r/min or higher.
•Throttle position sensor output voltage is 1.5 volts or higher.
•Mass airflow sensor output voltage is 0.2 volt (corresponding to an air flow rate of 0 g/sec) or higher.
Judgement Criterion
•Mass airflow sensor output voltage has continued to be 1.8 volts (corresponding to an air flow rate of 10 g/sec) or lower for 2 seconds.

TROUBLESHOOTING HINTS (The most likely causes for this code to be set are
•Mass airflow sensor failed.
•Mass airflow sensor circuit harness damage, or connector damage.
•ECM failed.

Hope this helps!

Michael

 

Hey mike thanks for the info! I will show this to my tuner today. I appreciate your time and efforts regarding this issue.

 

I know this sounds probably fishy, but I can almost assure you that the P0101 code is due to your Tial 50mm BOV. I've gone through 3 and swapped out many different springs with them. Every time I installed that thing on it threw the code. Took it off and replaced the BOV, got rid of it.

I have a whole thread about it on another forum in more detail.

As for p2096, that is a common issue with people running test pipes due to the different amount of ohms your O2 sensor is picking up without some type of "filter" if you will.
You can disable it within your ECU or you can purchase a longer bung to extend your O2 sensor out from the test pipe giving it a smaller reading, thus simulating similar outputs as your OEM cat did.

Good luck.

 

You had cams and an atmospheric BOV with no tune, and no problems?




After I get past that one, then I'm going to be confused why you did cams before going to a bigger turbo since the MIVEC adjustments on the OE cams are usually more than enough when you're still using the stock turbo.