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Thread: E39 M62 Question

  1. #1
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    E39 M62 Question

    I noticed when I'm going up a hill and the car shifts into fifth gear, I get pinging and Ticking noises and the car's acceleration just about falls flat. If I sport shift down into fourth it's okay. As soon as I go back into D, she levels off and Falls flat and starts pinging. Any ideas anyone what could be causing this? Thanks in advance

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  2. #2
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    Bad fuel, to much timing...
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  3. #3
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    What octane are you feeding it?
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  4. #4
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    Bad fuel as mentioned already. Injectors. Could be spark related. Plugs, coils, or knock sensors

  5. #5
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    Quote Originally Posted by BimmrMeUpSnotty View Post
    What octane are you feeding it?
    93

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  6. #6
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    Quote Originally Posted by Bmwpower603 View Post
    Bad fuel as mentioned already. Injectors. Could be spark related. Plugs, coils, or knock sensors
    I do have a suspect knock sensor... Is that symptom indicative of a bad one?

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  7. #7
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    Is this an auto-equipped car, that spends a lot of time in stop-and-go traffic?


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  8. #8
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    Quote Originally Posted by edjack View Post
    Is this an auto-equipped car, that spends a lot of time in stop-and-go traffic?
    50/50

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  9. #9
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    Carbon build-up, IMHO. There are various elixers out there to help disolve it. An Italian tune-up, in conjunction, may also help.

    What do the plugs look like?
    Last edited by edjack; 05-29-2017 at 10:38 PM.


    Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

  10. #10
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    Quote Originally Posted by edjack View Post
    Carbon build-up, IMHO. There are various elixers out there to help disolve it. An Italian tune-up, in conjunction, may also help.

    What do the plugs look like?
    Ilixer recommendations? Italian tune up?

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  11. #11
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    Haha, Yeah, an Italian tune up! Take it out on the highway, use your radar detector and run that thing hard like you stole it for a good 5 to 10 minutes, burn out all that carbon build up.
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  12. #12
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    Quote Originally Posted by 300kplus View Post
    Ilixer recommendations? Italian tune up?

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    Plugs are a year old [10k]

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  13. #13
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    Quote Originally Posted by BimmrMeUpSnotty View Post
    Haha, Yeah, an Italian tune up! Take it out on the highway, use your radar detector and run that thing hard like you stole it for a good 5 to 10 minutes, burn out all that carbon build up.
    Maybe longer and faster, at lower gears.

    Visit your local auto parts store for elixir recommendations. Hope some of us have recommendations, since I have none.

    I run mine pretty hard at times, so I haven't been bothered with buildup.


    Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

  14. #14
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    Fuel filter or pressure regulator?

  15. #15
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    Quote Originally Posted by first540i View Post
    Fuel filter or pressure regulator?
    Where is the pressure regulator located? Also, how often do you change the fuel filter, and what brands do you recommend as that's something I certainly don't want to have to do frequently [but will if it calls for it]?
    Thanks

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  16. #16
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    80-100K on the filter, depending on where you buy fuel. Get Hengst or other German filter.

    On your engine, the pressure regulator is on the fuel rail.

    BTW, the engine control computer will back off on the ignition timing when it detects the pinging. If it's severe enough, the engine will suffer significant power loss.
    Last edited by edjack; 05-30-2017 at 12:30 PM.


    Ed in San Jose '97 540i 6 speed aspensilber over aubergine leather. Build date 3/97. Golden Gate Chapter BMW CCA Nr 62319.

  17. #17
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    Quote Originally Posted by edjack View Post
    80-100K on the filter, depending on where you buy fuel. Get Hengst or other German filter.

    On your engine, the pressure regulator is on the fuel rail.

    BTW, the engine control computer will back off on the ignition timing when it detects the pinging. If it's severe enough, the engine will suffer significant power loss.
    Thanks for this. Yeah, she definitely flattens out and starts pinging upon hitting the drive gear. Once I downshift, she's all good. Been eyeballing that filter anyway and will now look at the regulator. Is that regulator an oem part requirement as general consensus [recommended by us DIYers, or can you go aftermarket?]
    If so, any recommendations would be much appreciated...
    Thanks again.

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  18. #18
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    Quote Originally Posted by edjack View Post
    80-100K on the filter, depending on where you buy fuel. Get Hengst or other German filter.

    On your engine, the pressure regulator is on the fuel rail.

    BTW, the engine control computer will back off on the ignition timing when it detects the pinging. If it's severe enough, the engine will suffer significant power loss.
    For 98 he might have the transition 2-way under the car but not part of filter, no?

    - - - Updated - - -

    Also correct on timing. The knock sensors detect and then you get timing pull.
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  19. #19
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    This is what I pulled up on oem [#3] Is the regulator visible when you pop the hood-where exactly is this system?

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  20. #20
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  21. #21
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    Quote Originally Posted by philly98540 View Post
    It's on the bottom of car under the drivers seat. Gotta remove the underpanel.
    Aha! Thanks!

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  22. #22
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    I'm curious? How did we get to exploring the pressure regulator when the obvious cause of pinging is excessive timing or compression? Especially when these engines are known for carbon buildup when not regularly exercised.
    Checking fuel pressure at the rail is definitely a good check along with plug color and visual of piston top.
    The posters mention of a suspect knock sensor could be a sensor reacting to carbon knock.
    I've pulled apart m62's with so much carbon that the valves got held open and compression was lost.

  23. #23
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    Quote Originally Posted by wagons ho View Post
    I'm curious? How did we get to exploring the pressure regulator when the obvious cause of pinging is excessive timing or compression? Especially when these engines are known for carbon buildup when not regularly exercised.
    Checking fuel pressure at the rail is definitely a good check along with plug color and visual of piston top.
    The posters mention of a suspect knock sensor could be a sensor reacting to carbon knock.
    I've pulled apart m62's with so much carbon that the valves got held open and compression was lost.
    Just gathering information not only for what might be a remedy now but perhaps in the future if it comes to that point. Just like most people on here, I'm learning about these cars. For instance I just learned from you about how bad these M62's can carbon up. I've never heard that before... I'm the one that said that I have a suspect knock sensor btw. Since time is a luxury for me, I like to gather all the information and work from there rather than coming back 10 times after trying nine things... How do you do the timing on these engines or deal with too much compression while we're on the subject?
    Thanks!

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  24. #24
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    Carbon buildup on M62's is not common.
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  25. #25
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    Knock sensors at rest provide no input to the computer. Vibration generates voltage signals for the computer to retard. So a bad knock sensor would allow pinging to continue with no power cut.
    Timing is non adjustable, controlled by the computer (DME)
    Checking compression may not be a viable test as it may not static check significantly higher, but carbon in the cylinder should be visible on piston tops if it's as bad enough to ping.
    Carbon buildup from a slightly leaky ccv combined with continued under 3000rpm operation is all it takes. Not enough to smoke but i'd love to see inside the manifold. (for oil puddles)
    And how many miles on this car 300kplus? 300kplus?

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