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Thread: got diagnostics test, hav question

  1. #1
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    got diagnostics test, hav question

    i got my codes pulled and there were 2 errors. one was the MAF sensor, and the other one was 02 sensor. the mechanic said it might only be the MAF sensor, but it is giving a bad signal to the 02 sensor. does anyone know if this is true? those of u who had MAF sensor problems, when u pulled the codes, did it give u a 02 sensor error too??

  2. #2
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    it can do that....
    BAN HIS ASS!!
    744 C36 AMG- carlsson
    040 C43- way to many modifications
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    744 CLK500 Rocket Bunny widebody

  3. #3
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    damnit!! today when i was driving it feels like my car is about to stall!!!!!!!!!! WTF... when i give it more gas i can hear my car going *put-put-put*! is this due to my MAF sensor? i havent replaced it yet because i was told that it would only affect my gas mileage, and i didnt really care because i dont drive very far..

  4. #4
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    Originally posted by ryhi
    damnit!! today when i was driving it feels like my car is about to stall!!!!!!!!!! WTF... when i give it more gas i can hear my car going *put-put-put*! is this due to my MAF sensor? i havent replaced it yet because i was told that it would only affect my gas mileage, and i didnt really care because i dont drive very far..

    SOunds like MAF to me!
    BAN HIS ASS!!
    744 C36 AMG- carlsson
    040 C43- way to many modifications
    744 CLK55- even more mods
    CLS55 IWC edition
    744 CLK500 Rocket Bunny widebody

  5. #5
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    yea....but it only happened like today....i kinda noticed it last night driving home from dinner... my CEL has been on for like 2 weeks

  6. #6
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    just buy a new MAF from Importec.com
    BAN HIS ASS!!
    744 C36 AMG- carlsson
    040 C43- way to many modifications
    744 CLK55- even more mods
    CLS55 IWC edition
    744 CLK500 Rocket Bunny widebody

  7. #7
    CKlasse
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    Check your air filter.. if it's good, then your MAF/P is sending out of range signals. This causes misfires and in turn set off your O2 sensor.

    It looks like your engine went into limp mode due to the misfires too. A new MAF will set you back a good $200-250. Installation is extremely easy!

  8. #8
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    does a faulty MAF sensor cause the car to stall?!?!

  9. #9
    does a faulty MAF sensor cause the car to stall?!?!
    Yes! MAF Sensors will throw off your entire car, including causing it not to start, not idling correctly, stalling while driving, lurching,..etc

  10. #10
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    forgot to add...the mechanic told me if u constantly run ur car at high RPMs or redline it, the maf sensor will go bad. is this true? if it is, this is probably what happened to me.....i checked the wire and it doesnt seem dirty at all.

  11. #11
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    Originally posted by BoominVolvo
    Yes! MAF Sensors will throw off your entire car, including causing it not to start, not idling correctly, stalling while driving, lurching,..etc
    Yes but nnot quite. In the frst couple seconds after start up the FI system is open loop and I think it ignores O2 and MAF and only looks at throttle position sensor and water temp. Please someone correct me if I am wrong cuz I'm just guessing. My point is should start fine but want to stall after its off high idle, say a min after going closed loop and building some temp. If things were real bad it would stall as soon as it went closed loop. Please tell us as many symptoms a you can think of.
    moebiusgold
    \'95 C36

  12. #12
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    My car idels non stop, but its not a lot, i think my MAF is going bad...i dont mind it cause its pritty minimal..hopefully its not something i will have to do any time soon

    Elvir
    Baaa

  13. #13
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    Originally posted by C280 JR
    My car idels non stop, but its not a lot, i think my MAF is going bad...i dont mind it cause its pritty minimal..hopefully its not something i will have to do any time soon

    Elvir
    How many RPM in drive and in neutral when all warmed up?
    moebiusgold
    \'95 C36

  14. #14
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    i would try changing the 02 sensor first
    also it's less than half the price of a MAS so not much to lose
    \"F*** new model cars, we ridin\' ol\' school\" €

  15. #15
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    Re: got diagnostics test, hav question

    Originally posted by ryhi
    i got my codes pulled and there were 2 errors. one was the MAF sensor, and the other one was 02 sensor. the mechanic said it might only be the MAF sensor, but it is giving a bad signal to the 02 sensor. does anyone know if this is true? those of u who had MAF sensor problems, when u pulled the codes, did it give u a 02 sensor error too??
    after my test i got some fuel malfunction bank 1 error, it said to check for vacumm leaks which i saw none. Any ways everybody i talked to said its the MAS, but the car ran fine. the only thing i was having a problem with was poping noise in the precats, my firend said that its because my MAS is feeding to much fuel and isn't burning it fast enough so it combusts in the precats.

    So anyways before buying a new MAS, i took it out and cleaned it the way Speeybenz did and so far no more poping noise which happend at least a few times a day especially when i gun it. I still have to erase the code and run it for at least a week to know for sure if i solved the problem thou.
    Got BRABUS?

  16. #16
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    in drive its about 700(+,-), at park its about 1K
    Baaa

  17. #17
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    -when i try to give my car a little more gas, it starts to do the put-put-put thing

    -when im making kinda sharp turns, the car feels like its about to stall and starts to jerk

    -sometimes when i stop, the car stalls and i have to restart

    i ordered a new MAF sensor, since the codes did say i had a bad MAF sensor. i hope this is all tho....and i hope i dont need to replace the 02 sensor (which was another code)

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