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Maf and throttle body clean w203 m112
07-18-2013, 09:47 PM
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2001 C320 Automatic
Maf and throttle body clean w203 m112
How do I remove and clean maf I have crc maf and throttle body cleaner my w203 has 134k miles. I'm sure it needs to be cleaned . Do you have to replace gaskets ? Any tips / instructions will help
07-18-2013, 10:59 PM
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07-22-2013, 06:28 PM
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cleaned my maf and airfilter re oiled it with minimal oil K&n, cleaned the throttle body. NIGHT AND DAY difference car is smooth off the line no more hard shifting. I even reset the throttle calibration my holding the pedal to the floor and resetting it. Amazing results here if anyone wants pictures i will post later on. This is by far the best mod 
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07-29-2013, 03:41 PM
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2001 C320 Automatic
okay so today i got this
https://i.imgur.com/ZMkptA1.png
I checked all connections everything is connected. i wonder why after driving it 150 miles its already giving a code. it happened when i was stopped at a stoplight.. weird
i guess im going to have to run some more tests i did a throttle reset using the pedal.
My next step is running the diagnostics on the maf from my obd2 app on my android.
Impressive results gives me the error code everytime, pairs up in 2 seconds. and its got tons of diagnostics and details. will keep you updated.
maybe the maf just went out coincedentally
https://i.imgur.com/ZMkptA1.png
I checked all connections everything is connected. i wonder why after driving it 150 miles its already giving a code. it happened when i was stopped at a stoplight.. weird
i guess im going to have to run some more tests i did a throttle reset using the pedal.
My next step is running the diagnostics on the maf from my obd2 app on my android.
Impressive results gives me the error code everytime, pairs up in 2 seconds. and its got tons of diagnostics and details. will keep you updated.
maybe the maf just went out coincedentally
Last edited by Ivanrad; 07-29-2013 at 04:55 PM.
07-29-2013, 07:41 PM
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2006 C230 & 2002 C230
So, there are (at least) two types of codes stored in the ECU.
Pending - you don't see the CEL on the dash yet but ECU has been registering. This will be erased by itself if the engine operates w/o any further substandard signal from sensor(s).
Stored - you see the CEL on the dash. This will not be erased by itself in the ECU (CEL might be turned off by itself though). Stored codes can only be erased manually.
07-29-2013, 08:53 PM
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ahh okay. should i unplug the maf connector and determine if its still the sensor? why would this happen after cleaning i seriously babied the sensor when i had it out. i reconnected everything and double checked , to see if everthing was in order. every hose connector and plug is right. now why the rough idle..
07-30-2013, 12:34 PM
#13
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IAT sensor is incorporated into the MAF on modern Benz cars. Ignore it for now until it triggers a CEL. Is the car running normally?
Last edited by Glyn M Ruck; 07-30-2013 at 12:43 PM.
07-30-2013, 04:11 PM
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2006 C230 & 2002 C230
With the MAF sensor unplugged:
If the car runs better than before, it means the MAF sensor is the culprit.
If the car runs same/bad as before, it means MAF sensor is NOT the culprit. Something else is wrong.
If the car runs worse than before, the ECU is not using the default setting.
Let us know what you find out.
Did anything touch the sensor's film surface other than the liquid cleaner?
Did you clean the Throttle Body? If yes, how?
07-30-2013, 05:34 PM
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2001 C320 Automatic
https://mbworld.org/forums/c-class-w...w203-m112.html
What kind of spray/cleaner/chemical did you use? the same as the thread says, crc cleaner
Did anything touch the sensor's film surface other than the liquid cleaner? never touched the MAF with my fingers i even put it in a Tupperware container
Did you clean the Throttle Body? If yes, how? used white cloth that doesnt rub off on the metal sprayed it with the top quality throttle body cleaner went from dirty to polished silver i covered the computer portion with a plastic bag.
I will unplug the maf today and let u all know how it goes.
What kind of spray/cleaner/chemical did you use? the same as the thread says, crc cleaner
Did anything touch the sensor's film surface other than the liquid cleaner? never touched the MAF with my fingers i even put it in a Tupperware container
Did you clean the Throttle Body? If yes, how? used white cloth that doesnt rub off on the metal sprayed it with the top quality throttle body cleaner went from dirty to polished silver i covered the computer portion with a plastic bag.
I will unplug the maf today and let u all know how it goes.
07-30-2013, 06:30 PM
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On the 320 you can unplug the MAF & it will force the ECU onto a default MAP. It usually gives an indication if the MAF is failing.
07-30-2013, 06:35 PM
#18
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Are you sure that the airbox is clipped down tightly over the MAF & is sealing properly? If not this causes the MAF to surge & can give spurious codes.
07-30-2013, 07:26 PM
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okay so i unplugged the maf and drove it it drives fine just when braking it gives a little jiggle like a hiccup. im thinking motor mounts but this would gradually happen not just suddenly right>?
going to pull the codes and will check air box
Update* 15 mins ago i checked how its seating on the maf properly . it sure is... do you think its the throttle body?
going to pull the codes and will check air box
Update* 15 mins ago i checked how its seating on the maf properly . it sure is... do you think its the throttle body?
Last edited by Ivanrad; 07-30-2013 at 07:31 PM.
07-30-2013, 07:36 PM
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2001 C320 Automatic
http://imgur.com/TRZaKYd
new check engine code
im just trying to understand what I could have done wrong I reinspected it again all connections are in the write order. I am thinking of taking it all apart again. Is it possible the maf was inserted backwards from what I remember its impossible .
new check engine code
im just trying to understand what I could have done wrong I reinspected it again all connections are in the write order. I am thinking of taking it all apart again. Is it possible the maf was inserted backwards from what I remember its impossible .
Last edited by Ivanrad; 07-30-2013 at 10:21 PM.
07-31-2013, 12:41 AM
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07-31-2013, 08:29 AM
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http://imgur.com/TRZaKYd
new check engine code
im just trying to understand what I could have done wrong I reinspected it again all connections are in the write order. I am thinking of taking it all apart again. Is it possible the maf was inserted backwards from what I remember its impossible .
new check engine code
im just trying to understand what I could have done wrong I reinspected it again all connections are in the write order. I am thinking of taking it all apart again. Is it possible the maf was inserted backwards from what I remember its impossible .
You might be heading for a MAF replacement. Check everything you touched for air leaks.
07-31-2013, 12:01 PM
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Wait how am I headed towards a maf replacement when the maf was unplugged yesterday and the car ran the same way. Where r u these evil vaccumm lines
07-31-2013, 12:10 PM
#24
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FYI
cleaned my MAF and air filter re oiled it with minimal oil K&n, cleaned the throttle body. NIGHT AND DAY difference car is smooth off the line no more hard shifting. I even reset the throttle calibration my holding the pedal to the floor and resetting it. Amazing results here if anyone wants pictures i will post later on. This is by far the best mod
whunter@pelicanparts.com
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07-31-2013, 01:46 PM
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2006 C230 & 2002 C230
