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back pressure
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  1. E60 / E61 (2004 - 2010)
    2006 530i N52 120,000 mi So when I start the car up in morning and pull out of driveway, car is snappy and responsive (have a BMS pedal tuner installed), exhaust is quiet, all is good. After driving for about 20 mins, the car seems to get "heavy". The take-off response is noticeably slower, and...
  2. E90/E91/E92/E93 (2006 - 2013)
    Hi I brought a BMW 330D couple months ago recently hooked my OBD II and found this error code P14A7 (the car also lost power a few times) also ill be doing 39 MPG and start the next day and car will drop to 22 MPG like it resets itself. Anyways i took it to a so called BMW Specialist and he...
  3. E39 (1997 - 2003)
    Salutations friends I am gladly but aggravatingly driving a 2002 530i that intermittently loses power , as in acceleration , it will sort of kick and become almost irrelevant to give it gas BC I'm not going over 10 mph and it has me thinking its my cat converter , or the rear o2 sensor because a...
  4. E63 / E64 6 Series (2004 - 2010)
    I have a 2005 645ci 40k miles. Has anyone experienced sputtering and hesitation at lower rpms? It almost feels like a backfire. And at times it happens at regular intervals like its a misfire. Dealer didn't find anything when hooked up to their computer. Idol seems smooth. THX
  5. E89 Z4 (2009 - current)
    If I take the muffler off of my 525i do I have to worry about back pressure Problems? In 2000 I brought a brand new 2001 Harley Davidson Fat Boy and when i asked the dealer about taking the mufflers off and just going straight pipe I was warned about Messing up the engine if not retuned after...
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