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Thread: The OFFICIAL bogging, hesitating, no acceleration from idle thread

  1. #101
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    I just paid like $480 for a FI service, didn't help a bit.
    That which is seen is temporary, that which is unseen is eternal, therefore, focus on the unseen things.

  2. #102
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    Quote Originally Posted by unseenthings
    I just paid like $480 for a FI service, didn't help a bit.

    $480 ? WTF ? For what ? New injectors and fuel rail or what ?
    E39 M5 Individual ( RIP IN DUBAI)
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    http://forums.bimmerforums.com/forum....php?t=1861634

  3. #103
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    Quote Originally Posted by YaYo325
    Really? hmmm...so thats makes two of us with the same problem. this rubber boot i hear is cheap from bavauto. I will replace it and see if it fixes or improves teh situation.
    yep same here, put some good ol black ducktape around it.

  4. #104
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    '92 BMW 325is Coupe
    One thing I learned about this weekend and somehting you guys should look into is to check if the vanos screen ( filter) is not clogged. I did not get to much information as to where this filter is but heard a clogged filter contributes to failures of the vanos as well as new replacements. To my knowledge BMW does not sell this filter but there are other distributors that do. I found this info in a BMW magazine ( dont recall exactly which one) in the technical Q &A section

  5. #105
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    2014 X1 xdrive/2013 WRX
    I have this same issue, the hesitation etc. I also have a slight pinging between the same rpms (2000-2800k rpms) i use the highest octane, had my knock sensors replaced, fuel filter replaced, sparkplugs etc, nothing seems to help whatso ever. could it be the crankshaft position sensor? also i get the same rappin chain sound, could that be caused by the timing chain tensioner being weak?


    this is driving me nuts!!

    -Ben

  6. #106
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    1995 M3 - Mugello Rot
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    In the most recent "Fast Times" the newsletter from Bav Auto some one writes in with similar loss of power problems on a 87 325i. I'll just type out the whole thing, sorry if there are typos.

    Dear Bavarian Otto,

    I have just recently begun having trouble when I accelerate in my 87 325i. I lose power momentarily and then it comes back a second later. I changed all of the spark plugs, thinking that maybe one was out, but that wasn't the problem. I think that it has to do with the fuel filter or pump. What do you think the problem is and how can I fix it? Please help me ASAP, before I have to walk to school! Thanks.

    Nick


    Reply,

    While it can't hurt to replace your fuel filter, this isn't likely to be the cause of your problem. A stumble during acceleration can be caused by a failing oxygen sensor. If you have no apparent vacuum leaks and the car is idling and driving fine otherwise, that's what I would try first.

    He then goes on talking about how much the part costs and what he needs to do to replace it. He also mentioned that O2 sensors usually last around 60,000 miles.

    I know this problem was on a e30 but I thought I would pass it along....
    100% Stock

  7. #107
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    2013 M3, 1993 325is
    Quote Originally Posted by PJ Steamboat
    In the most recent "Fast Times" the newsletter from Bav Auto some one writes in with similar loss of power problems on a 87 325i. I'll just type out the whole thing, sorry if there are typos.

    Dear Bavarian Otto,

    I have just recently begun having trouble when I accelerate in my 87 325i. I lose power momentarily and then it comes back a second later. I changed all of the spark plugs, thinking that maybe one was out, but that wasn't the problem. I think that it has to do with the fuel filter or pump. What do you think the problem is and how can I fix it? Please help me ASAP, before I have to walk to school! Thanks.

    Nick


    Reply,

    While it can't hurt to replace your fuel filter, this isn't likely to be the cause of your problem. A stumble during acceleration can be caused by a failing oxygen sensor. If you have no apparent vacuum leaks and the car is idling and driving fine otherwise, that's what I would try first.

    He then goes on talking about how much the part costs and what he needs to do to replace it. He also mentioned that O2 sensors usually last around 60,000 miles.

    I know this problem was on a e30 but I thought I would pass it along....


    Hmm...I guess it's a possibility, but my O2 sensor is only 7,000 miles old. Though I guess its possible I got a bad one, or maybe my cats are bad?
    Dan

  8. #108
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    Why don't you take off your cats and see how it runs
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  9. #109
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    Wow now that i think of it... my cat stinks like SIN... i wonder if it could be clogged? And once the motor warms up, it makes it worse? Hmmm something to try. I think its running rich too. Maybe I'll try a new cat (or no cat ) and oxygen sensor. Does a 93 just have one o2 sensor?

    -Chris

  10. #110
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    Quote Originally Posted by a32guy
    Wow now that i think of it... my cat stinks like SIN... i wonder if it could be clogged? And once the motor warms up, it makes it worse? Hmmm something to try. I think its running rich too. Maybe I'll try a new cat (or no cat ) and oxygen sensor. Does a 93 just have one o2 sensor?

    -Chris
    Yes...one sensor. Maybe it is the cats...don't want to know what they run...
    Dan

  11. #111
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    cats are expensive

    I know that in California, if you fail emissions, the state will help you pay to fix what is needed to pass, if you have insufficient funds
    2004 SilberGrau M3 Coupe 6MT No roof No Power or Heated Seats No Nav

  12. #112
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    Quote Originally Posted by dmurray14
    Yes...one sensor. Maybe it is the cats...don't want to know what they run...
    Look for some used M3 ones, they don't go for that much.
    100% Stock

  13. #113
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    three twenty slow, a
    Kinghawk: where is this vanos filter located?

    I also have a new o2 sensor. The motor is very smooth now. Ive had MAF codes come up. I think its due to a little vacuum leak I have someplace, around my TB. Ive been busy but tomorrow Im going to look for it.

    -Serge

  14. #114
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    Quote Originally Posted by PJ Steamboat
    Look for some used M3 ones, they don't go for that much.
    Why are they cheap? And what advantage do M3 cats have? Also, how does one tell if used cats are good?

    Thanks,
    Dan
    Dan

  15. #115
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    Quote Originally Posted by dmurray14
    Why are they cheap? And what advantage do M3 cats have? Also, how does one tell if used cats are good?
    Thanks,
    Dan
    M3 cats usually go for around $200 but you can find them for less. I am not sure of the advantage but it's from a M3 so it must be better I know one way that you can tell if you cats are failing is if they smell like rotten eggs (sulfur).
    100% Stock

  16. #116
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    Update: Won a vanos unit on ebay for $18

    (If you were the high bid until the last three seconds I appologize, but sniping is the only way to go on ebay )

    Also talked to a friend who's buddy works at a local dealership. He can get me the cam lock tool to borrow for a weekend

    Now the question is when will I get off my lazy butt to do this? And will it even do anything?

    I'm thinking if its not the vanos, I'm going to change the DME, o2 sensor, and possibly MAF but not sure about that one.

    -Chris

  17. #117
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    Quote Originally Posted by a32guy
    Update: Won a vanos unit on ebay for $18
    (If you were the high bid until the last three seconds I appologize, but sniping is the only way to go on ebay )
    Also talked to a friend who's buddy works at a local dealership. He can get me the cam lock tool to borrow for a weekend
    Now the question is when will I get off my lazy butt to do this? And will it even do anything?
    I'm thinking if its not the vanos, I'm going to change the DME, o2 sensor, and possibly MAF but not sure about that one.
    -Chris
    Please let us know!
    Dan

  18. #118
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    I fixed my problem.. It was the coolant temp sensor..

    What did not work..

    Coils, MAS, plugs, cam position sensor..

  19. #119
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    Quote Originally Posted by zeit00
    I fixed my problem.. It was the coolant temp sensor..
    What did not work..
    Coils, MAS, plugs, cam position sensor..
    Are you serious? Did it run decent when cold then get crappy when warm with the same symptoms? If so I'll go to the dealership right now and change it out.

    Let us know!! Thanks man!
    -Chris

  20. #120
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    Quote Originally Posted by a32guy
    Are you serious? Did it run decent when cold then get crappy when warm with the same symptoms? If so I'll go to the dealership right now and change it out.
    Let us know!! Thanks man!
    -Chris
    Nope it ran crappy the moment it fired up.. But if the sensor was sending out a bogus signal, it wouldn't make a difference if the car was hot or cold.. The car probably always thought it was freezing cold and would rich out the fuel..

  21. #121
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    Did you replace 13 or 15?

    EDIT: Picture fixed
    Last edited by a32guy; 10-24-2005 at 02:34 PM.

  22. #122
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    Quote Originally Posted by a32guy

    Did you replace 13 or 15?
    no hotlinking allowed..

  23. #123
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    Quote Originally Posted by zeit00
    no hotlinking allowed..
    Oops, fixed ^^^

  24. #124
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    I replaced both.. They are cheap.

  25. #125
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    portland, or USA
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    95 318i, 89 Chev Blazer, 03 Harley FLSTF
    Was having a massive surging problem. Replaced the O2 sensor this weekend and now the miles per gallon needle is steady as a rock - even up hills or with the AC on. Can't believe what a change the new sensor is making. My mpg is going to be sooo much better. I haven't noticed a distinct change like this since I replaced my cabin filter a few weeks ago. Just wish I would have dropped the $ for a new O2 sensor at 100k instead of 135k

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