MAF Sensor problem??

Discussion in 'Modifications & DIY how-to' started by sikwrx04, Aug 25, 2012.

  1. sikwrx04

    sikwrx04 Member

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    Alright guys i am getting annoyed right now, short story short drove my 04 wrx home one night (Tuesday) and coming up to a stop sign my car dies on me from 3k rpm straight down to zero lol it kept having the same problem whenever the car is in neutral that same night the car didn't have any CEL so i didn't think anything of it....but i haven't drove the car since last night and it kept having the problem then it threw a CEL

    P0171 System too Lean (Bank 1)
    P0102 Mass or Volume Air Flow Circuit Low Input
    P0113 Intake Air Temperature Circuit High Input

    From what i know and from the help of steve (h23bb2) it deals with the MAP sensor so what i did was i went and bought Mass Air Flow Cleaner and cleaned the sensor out and put it back in and still the car idles fine at first start up but most of the time once i put any throttle into the car it cuts off or idles very low and picks itself up and down up and down....would replacing the sensor fix everything???? (WAY TO EXPENSIVE FOR A SENSOR)

    Another solution is a vacuum leak but i bought carb cleaner and sprayed it throughout all the vacuum lines to see if the idle was spike up but it didn't so i am lost of idea any suggestion would help before i spend mad money on a sensor :wtc:
     
  2. ChrisW

    ChrisW Member

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    I've got a spare we could test it with, where are you in Gwinnett?
     
  3. sikwrx04

    sikwrx04 Member

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    Located in Buford by mall of ga, I a, not currently home with out on a break cause I was so frustrated lol
     
  4. ChrisW

    ChrisW Member

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    I'm also mall of ga, wanna meet up tomorrow afternoon sometime?


    Or you can come by my house this afternoon if you'd like, lmk
     
    #4 ChrisW, Aug 25, 2012
    Last edited: Aug 25, 2012
  5. sikwrx04

    sikwrx04 Member

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    Alright mos def!!
     
  6. ChrisW

    ChrisW Member

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    Pm me your number when you get a chance
     
  7. sikwrx04

    sikwrx04 Member

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    Alright guys so i met up with Chris today and since he had a spare MAF sensor, i decided to plug it in to see if that was the case, but it WASN'T and car still cuts off with any acceleration or throttle play......Ive checked leaks with CARB cleaner to see if any idle would spike up but nothing.......I am lost out of idea's now....
     
  8. sikwrx04

    sikwrx04 Member

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  9. RSConvert

    RSConvert ɹǝuɹnʇpɐǝɥ uʞnɟɐɥnɯ ɐ sʇı
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    I had that issue once...turned out to be my alternator.
     
  10. h23bb2

    h23bb2 Member

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    Seriously?!?! How did you ever figure that out? Unstable voltage?

    I'm supposed to meet up with the OP sunday to inspect/log the car....
     
  11. CelticPride

    CelticPride Banned

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    Cause Patrick is just that awesome.
     
  12. RSConvert

    RSConvert ɹǝuɹnʇpɐǝɥ uʞnɟɐɥnɯ ɐ sʇı
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    With the idling low/stalling still happening after cleaning the maf...checking for boost leaks and clean the throttle body as well as the iac valve...we tested the alt. voltage and it read in the low 11's iirc...so I replaced the alternator...problem solved for me.

    You're Awesome too...
     
    #12 RSConvert, Aug 30, 2012
    Last edited: Aug 30, 2012
  13. CelticPride

    CelticPride Banned

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    My M3 did the EXACT same thing.....that freaking alternator was too expensive.


    Mind blown.....
     
  14. Matt

    Matt Think before you post
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    His awesome what?
     
  15. RSConvert

    RSConvert ɹǝuɹnʇpɐǝɥ uʞnɟɐɥnɯ ɐ sʇı
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    D

    o

    u

    c

    h

    e

    s
     
  16. CelticPride

    CelticPride Banned

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    Nice awesome douche. Sounds about right.
     
  17. sikwrx04

    sikwrx04 Member

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    Lol thanks guys, gonna inspect alittle more for leaks, ill probably clean out the IAVC tomorrow with the new gasket i bought...If it doesn't help then meeting up steve to check out whats wrong wit my car
     
  18. sikwrx04

    sikwrx04 Member

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    Found out the problem and it only took Steve (h23bb2) 30sec to find!! Lol i was missing a plug that i had put in the turbo inlet to close out the recirculating to the bov!! Thats why i had a major leak 0_o.......... Thanks to Steve for cutting his spare time to drive and hr to meet me up to see what was wrong with the car!!! Also thanks to Chris (ChrisW) for sparing some time as well!!
     
  19. CelticPride

    CelticPride Banned

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    Doh! That was quite serious and the fact the car had to be running lean.
     
  20. sikwrx04

    sikwrx04 Member

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    Yeah as soon as the problem happened it stayed parked in the garage till it was fixed.....anyone recommend a plug that will cover that issue? Something more stable?
     
  21. CelticPride

    CelticPride Banned

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    If you want an honest recommendation....reroute that into the bypass valve. If it can't do it....then get one that recircs.
     
  22. h23bb2

    h23bb2 Member

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    af learning B and C range were maxed out at 15%. A range wasnt far behind at 10%.
    i cringed when i seen that:| lol
     

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