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  1. #1
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    Engine lacking "boost" in higher rpm.

    I've a 2001 330i, and when I step deep into the gas pedal, the engine doesn't give that sudden power increase like it use to. When I down shift say from the 4th gear at 2500 rpm to 3rd 3300 rpm, in the past this would provide extra power and the car power sort of "jumps", now nothing happens, the acceleration is just very normal and flat.

    I have changed the spark plug, engine oils, and there are no warning lights. I have unplugging the battery for a few months while in storage, so the computer settings would be factor default now.

    Not sure what the problem is, any suggestions where I should look ? Thanks,
    Ken.


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    Yes | No

    Also, please tell us this car's mileage?


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    Re: Also, please tell us this car's mileage?

    The car has got 81250 miles on it.

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    Re: Also, please tell us this car's mileage?

    DRAIN THE 20W/50 OIL OUT OF IT AND

    install 5w/30 synthetic so the VANOS cam unit

    can work properly and give you some GO


    how old are the air, gas filters and plugs?


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    how did you decide it's 20/50 in there?

    Just curious t
    04 E46 325i Sport,Manual,Silver Grey/Black leather.my car
    90 Mazda Miata 90k original Red with Black........toy car
    01 Subaru Outback LL bean edition h6...........wife's car
    past BMW's: .
    88 735i e32 Black/Tan...93 325i e36 manual Electric Red/Black *my first NEW BMW!...00 528i e39 sport,manual Electric Red/Black

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    Projecting to his retirement date?


  7. #7
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    Re: Also, please tell us this car's mileage?

    The filter plugs were installed in 2007, but the car has little mileage since then...the air/gas filter is probably 2 years ago, but again, little mileages.

    Just brought a 2010 x5 diesel, fantastic interior, driving very tenderly now, can't wait to step on the pedal on a highway.

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    Kinda sounds like early CPS.

    either that or the more traditional suspects - fuel filter or bad spark.









  9. #9
    oc330cic
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    Re: Also, please tell us this car's mileage?

    If "little mileage" includes a cold start followed by immediate shutdown, it's possible the plugs are fouled. I've done that moving the car out into the driveway to wash it, and then back into the garage.

    Usually, though, you'll have alot of trouble starting the engine. If you suspect that, try driving it a good long distance, like on the freeway for an hour. If that doesn't help, try replacing the plugs.

    I think fouled plugs is actually pretty unlikely, because it's less of a problem with modern fuel injected engines, but it's easy and inexpensive to rule out.

  10. #10
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    High RPM power loss is most often atributed...

    to fuel starvation. If it begins to miss at high RPMs then it might need a basic tune. Keep in mind that one sorry tank of fuel can kill a fuel filter. No codes yet, eh?
    Photobucket

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    Also it turbodiesel time ! (?)

    well then forget the E46 if you just bought a X5 Turbodiesel !!!!

    but a fuel filter/regulator can be filled with crud/water/silt
    from just one filling station - replace it - change oil&filter,
    flush the brake fluid system and drive it

    miles on the E46 _______ ?
    year_________?

  12. #12
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    Re: Also it turbodiesel time ! (?)

    It's very likely the fuel filter/regulator is the problem, because I don't drive it much, the fuel levels are usually pretty low.

    I still love my E46! It drives great and sounds better than the turbo diesel on the X5!

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