mr747

Hi Guys

Went to start my car this morning and when i pushed the button cold start
it started perfectly then it sort of stalled and then revs went up again and idled perfectly

warmed it up for about 10 15 mins took off drove for 5 mins and then cel came on

i drove it back and parked it i will have to check the code later on when i get home

anyone else have this problem?
i just put carbonio airboxes on last week but the car has been fine only this morning it done this

any help would be greatly appeciated

Merc63

Need the code

mr747

i have to get it later on when i get home from work

Maverick1975

Has this now got charcoal filters mate in those air boxes ?

mr747

P0101 mass or volume air flow circuit range/performance

Mav I have the afe paper filters in with the Carbonio air box

mr747

Again I just cleared the code and started it up and it nearly stalled but didn't then it started idling ok

Merc63

I had that error the other day going to the track. I hammered it, cel came on.. That error. cleared it, never seen it since... Weird.

Inspect for the following conditions: An incorrectly routed harness--Inspect the harness of the MAF sensor in order to verify that it is not routed too close to the following components:
- The secondary ignition wires or coils
- Any solenoids - Any relays
- Any motors A low minimum air rate through the sensor bore may cause this DTC to set at idle or during deceleration.
Inspect for any vacuum leaks downstream of the MAF sensor. A wide open throttle (WOT) acceleration from a stop should cause the MAF sensor g/s display on the scan tool to increase rapidly. This increase should be from 6-12 g/s at idle to 230 g/s or more at the time of the 1-2 shift. If the increase is not observed, inspect for a restriction in the induction system or the exhaust system.
The barometric pressure (BARO) that is used in order to calculate the predicted MAF value is initially based on the MAP sensor at key ON. When the engine is running the MAP sensor value is continually updated near WOT.
A skewed MAP sensor will cause the calculated MAF value to be inaccurate. The value shown for the MAP sensor display varies with the altitude.
With the ignition ON and the engine OFF, 103 kPa is the approximate value near sea level.
This value will decrease by approximately 3 kPa for every 305 meters (1,000 feet) of altitude. A high resistance on the ground circuit of the MAP sensor can cause this DTC to set.
Any loss of vacuum to the MAP sensor can cause this DTC to set.

Read more at: http://www.obd-codes.com/p0101
Copyright © OBD-Codes.com

Merc63

These cars are so touchy with the AF metering and these MAF sensors.

Check for intake leaks. You might not be sealed after the MAF...

mr747

The plot thickens I should of done this on my own

The airflow meter on the drivers side was up side down and they have rounded the screw

I'm making them pick the car up on a tow truck to fix it

Merc63

Thought the MAF can only go in one way.

Ezec63

Did you read Carbonios new installation instructions? The driver side MAF should have the bosch ID label facing down
the passenger side MAf should have the bosch ID label facing up

http://www.carbonio.com/docs/catalog...%20install.pdf

abcut973

When I switched to the ROW airboxes the MAFs were not installed the same way from factory i guess. One was face up, the other was face down like carbonio is suggesting. Which one is the correct install?
Car is working fine so far.

Mort

The MAF sensors are directional to the airflow and thus they are inserted Bosch label down on the driver's side and Bosch label up on the passenger's side into the intake plumbing. If they are to read correctly they must be inserted with the correct side of the MAF filament facing the air flow. Once inserted into the intake plumbing you can no longer see the Bosch label. The driver's side will have the clip from the electrical connector facing up so you press the lock from the top side of the clip to remove it and upside down on the passenger's side so that the lock you press to remove the connector is on the bottom side and out of sight.

avery.whss

my cel came on because of the K&Ns but I cleared it (it's easy just pull out the button and use the key to turn on the car and it clears) but put AFE's in...no issues since...my car also chokes a lot less..it's still choking here and there but IDK....they stuck such little ***** air intake tubes on these cars...my old jap TT import had way bigger intakes and it was 30 years old, no wonder it chokes..it's like sucking air threw a straw almost...these cars just want LOTS of air and LOTS of fuel...god forbid if they TT the next one and put tiny little air tubes on it..that CF air intake @ a 3k price tag is a little steep for a front piece

abcut973

I didn't know you could clear a CEL just by turning the key to ON ?
IMO your code cleared itself. The only way you can clear an OBDII code is with a reader/scanner but the code actually remains in the history. So you don't really delete it.

avery.whss

no it didn't clear it self (the code could still be there but CEL isn't)...you can just pop the keyless go button out and use the key to clear it...theres a few posts about it on this forum + my service guy told me to do that ...I know it sounds far fetched...trust me I thought it was too because I figured I had to go into the dealer

Ezec63

The stock air tubes are garbage ! Check out c63 revozport intake. Big improvement over the whimpy stock tubes and its 1K not 3K

avery.whss

Found it...do you actually notice a difference with the revozport ones? it looks good...probably will buy it

SROC276

Glad its all sorted!