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Thread: 2005 MK4 Jetta 2.0 BBW creeping lean condition

  1. #11
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    Check for exhaust leaks usually the flex. Check for cam correlation should be mvb 93. Usually BBW they don't set the cam timing properly. Also oil pressure dictates cam correlation. Check cam correlation while the engine is cold and after you've been on the freeway about 10 miles check it again actual vs specified.

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  3. #12
    NostraJackAss Jack@European_Parts's Avatar
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    OP

    Also verify that there is sufficient fuel flow and volume by checking the filter that likes to plug up in the tank of these BBW cars.

    I am not liking what you posted for a MAF though...........put a genuine one in.
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  5. #13
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    Quote Originally Posted by ivagp View Post
    Check for exhaust leaks usually the flex. Check for cam correlation should be mvb 93. Usually BBW they don't set the cam timing properly. Also oil pressure dictates cam correlation. Check cam correlation while the engine is cold and after you've been on the freeway about 10 miles check it again actual vs specified.
    The timing belt has never been replaced on this car. Last I checked it was in good shape. Are they known to jump a tooth?

  6. #14
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    Quote Originally Posted by Jack@European_Parts View Post
    OP

    Also verify that there is sufficient fuel flow and volume by checking the filter that likes to plug up in the tank of these BBW cars.

    I am not liking what you posted for a MAF though...........put a genuine one in.
    Should I grab a Bosch MAF? I'll see about grabbing a filter. I need to grab a few tools to start checking fuel pressure and pull vacuum.

    Also, is it wise to grab a Bentley manual for my Jetta? Are they worth the price?

  7. #15
    NostraJackAss Jack@European_Parts's Avatar
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    I think a real Bosch MAF is a good idea or genuine from dealer.........lots of china garbage clones out there.

    Make sure this part #06A-906-461T

    Erwin and print to PDF after buying a day is the cheapest route for RTFB.
    European Parts Emporium/Performance / Immobilizer Solutions EPE
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    www.FixMyEuro.com <<<<<CLICK HERE! or vwemporium@aol.com ( JPPSG & Unverified members need not PM me & Please don't email or call facility for free tech support...use the forum )
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  9. #16
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    Timing belt is a 60000 mile service on that car. You should change it if it's never been replaced

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  11. #17
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    No they're not known to jump they're known to be off because there is no timing mark on the cam gear you have to remove the valve cover and install some kind of a tool or make your own Gadget and loosen the cam sprocket. But lots of times people are just marking the cam gear and putting the belt back on it might be fine but you must check cam correlation on MVB 93 to verify

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  13. #18
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    Quote Originally Posted by ivagp View Post
    No they're not known to jump they're known to be off because there is no timing mark on the cam gear you have to remove the valve cover and install some kind of a tool or make your own Gadget and loosen the cam sprocket. But lots of times people are just marking the cam gear and putting the belt back on it might be fine but you must check cam correlation on MVB 93 to verify
    Yes I've heard many horror stories dealing with timing on the BBW. As far as I know there's nothing timing related wrong with the car, but I'll double check cam and crank correlation again.

  14. #19
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    Quote Originally Posted by ivagp View Post
    you must check cam correlation on MVB 93 to verify
    What's MVB 93?

    *update* Was on phone and couldn't mouse over to determine is was Measuring Value Block.
    Last edited by brooklynt3ch11214; 06-26-2017 at 11:22 AM.

  15. #20
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    Quote Originally Posted by Jack@European_Parts View Post
    I think a real Bosch MAF is a good idea or genuine from dealer.........lots of china garbage clones out there.

    Make sure this part #06A-906-461T

    Erwin and print to PDF after buying a day is the cheapest route for RTFB.
    Okay I'll look up that part number. What's RTFB?

    *update* Was on phone and couldn't mouse over to determine is was Read The Fine Book lol
    Last edited by brooklynt3ch11214; 06-26-2017 at 11:23 AM.

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