Stage II TT CEL Help!
 

Well I was driving the car Sunday evening and it bogged down, almost like fuel cut, on acceleration. The CEL came on, along with the VDC and Traction lights. The car was in limp mode and running really rough and rich. I got the car home, parked it, and scanned the code with Cipher.

P0103,Mass or Volume Air Flow Circuit High Input is what it showed. I cleared the code and started the car, and it seemed to run fine. I haven't driven the car yet, as I had to leave for business.

Any idea what would cause this? I did a search and saw people have had the same CEL code with the Injen intakes in the rain. I have sent an email to Sam@GTM for his advice, but any input would be appreciated in the meantime!

I hope nothing is broken...

try spraying some cleaner on the MAF sensors. I know that a "higher then expected RPM" is due to a VAC leak, personal experience.

To find a VAC leak you can use throttle body cleaner and spray around fitting, couplers, etc.... if there is a VAC leak then the cars RPM will jump up for a second. Car could be rich in order to compensate for the "high air input" reading your getting from the MAFs. Which side is reading off, or is it both?

The RPM did jump up for a second from idle, which is weird since the car has been running great. I don't think the CEL differentiated between sides, it says MAF Bank 1/2 I think. Maybe I could run a datalog and see which side looks off?

its saying your MAF sensor voltage was too high which is why I am not certain about a VAC leak but MAF being dirty/damaged is possible....

yes, use the cipher and select the afr (b1/b2) and afr correction (b1/b2), maf voltage (b1/b2) maf correction (b1/b2), engine speed, and i think there is something for the o2 sensor voltage also and if so select that too.

watch it and see what is off and look at your corrections too. idk if anything will show since you cleared the code but if nothing does show and the code comes back later, do another data logging on the car before clearing the code.

if there is a leak, rpms will jump a little at idle. clearing the code will make the car run good until it realizes there is something wrong then things go back to where they were with the rpms jumping around at idle if there is a leak. When I say jump around I mean up to 1,000rpm +

Thank you for the help! I will be sure to try this when I get back in town! I will have to do a check for vacuum leaks.

I forgto to mention some things in last post

^^^ninja edit :tiphat:

I see you are at 433 WHP,. There has been a lot of talk about our MAF's only being good till 400whp, You may need to upgrade the MAF's themselves?

that is why GTM has 3'' intake piping. Stock MAFs with GTM TT kit should be ok for about 600rwhp, maybe more.

Agreed...car has been running great up until this! I have a feeling it has something to do with all the rain, but don't see how it could have sucked up any water. I need to check my MAF sensor connections.

clean the MAFS and reset the ECU, make sure everything is tightened up like VQstryker said, good tips, Repped!

P0103 Mass or Volume Air Flow Circuit High Input

I think your MAF sensor got wet especially if it was raining hard like you said in the email, clear the codes and look at both MAF voltages to see if they are even voltage wise. you Should see around.8 to .9 volt at idle . Rev the engine and see if the voltage is increasing smoothly. If all that is good then i think you got lucky and the sensor did not get damaged.

If the sensor got wet then there is a possibility that you might have still some water left in the intercooler, You should check and clean as needed .

Hope this help .

Sam

:iagree:

this is why I wanted you to data log the voltage and correction. Hopefully there is no damage, MAF sensors are not cheap by any means.

Thanks for the rep! :driving:

Thanks everyone for the help! :tiphat:

I will log the MAF voltages and correction factors when I get back in town. Fingers crossed there is no damage to the MAF sensors!

Well it happened again. Car bogged down and cut off. No CEL this time. I looked at the data log and one Bank 1 sensor is a 1.xx volts while Bank 2 is 4.xx. Seems like the MAF is acting up. :shakes head:

What is the exact Maf voltage at idle . If one maf is reading 4 volts at idel then you have a bad maf sensor .

Sam