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Thread: Bosch MAF sensor

  1. #1
    Regular Member raymie.d's Avatar
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    Default Bosch MAF sensor

    I have read a few threads on vectra-c/internet about using Isopropanol to clean the MAF. I have fitted a K&N panel filter, issues with oil on filter, also just fitted a CR1 tuning box my car is now drinking diesel and I am not even pushing it. I have seen most people on here get 45 -50 mpg, I am around 36-38 mpg doing mainly motorway miles

    A few questions

    1. Is it a good idea?
    2. How hard do you adjutate the MAF in the solution?
    3. Will it help my mpg figures?

  2. #2
    Regular Member Gsi3.2's Avatar
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    Default

    I'd only do this if i was really sure what i was doing...if you're not then leave it to someone who does.. but to answer your questions..

    1: if you think the filter is over oiled, then yes.
    2: you fill a plastic bag 1/2 full with the fluid, place the MAF in and then seal the bag and shake it up and down, remove the MAF and let it airdry naturally.
    3: if the MAF is oiled, then yes it should help..but if it isn't oiled up, then no.

  3. #3
    Regular Member Ian's Avatar
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    Default

    Personally, I would bin the K&N and fit a clean paper filter, changing it regularly, say every 8-10k will be just as good and in my opinion better for the engine. I've posted stuff about performance filters before so I wont repeat it here. I hope the good advice GSi 3.2 gave you helps the mpg bud.

  4. #4
    Regular Member Gsi3.2's Avatar
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    Default

    after some bad experiences...and Ian's posts.. i've gone back to paper filters myself..

  5. #5
    Regular Member raymie.d's Avatar
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    Default Changing back

    Thanks for the advice guys, i;ll be changing back to the stock filter tommorow. I am quite confident about doing the work, I just needed a bit of clarification.

    Thanks again.

  6. #6
    Regular Member Gsi3.2's Avatar
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    Default

    glad to help you out....

  7. #7
    Regular Member raymie.d's Avatar
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    Default Somewhat better

    Just an update on cleaning the MAF sensor. Cleaned it with ISOPROPANOL and you could see the dirt left in the bag, Changed back to the stock filter and also reset the ECU before connecting it all back into place. It has made a difference and my consumption is much much better, even with turning my tuning box up. All in all well worth the work.

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