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Thread: 316i Turbo Problems

  1. #1
    Join Date
    Mar 2018
    Location
    Germany
    Posts
    6
    My Cars
    1996 BMW 316i Sedan

    316i Turbo Problems

    Hi. I've installed a turbo in my 316i and it runs almost fine.

    1st) It needs throttle while hot to get started otherwise it doesn't. When cold, it starts without throttle but still hard.

    2nd) In random times my idle is falling while in neutral.

    3rd and last) When I press the gas while cold it plummets and then raises. If I leave the clutch too early it shuts down

    Can somebody help? Thanks in advance

  2. #2
    Join Date
    Jul 2004
    Location
    Houston, TX
    Posts
    12,462
    My Cars
    36 Cylinders
    You can't install a turbo without proper tune and correct auxiliary equipment to match.
    -Abel

    - E36 328is ~210-220whp: Lots of Mods.
    - 2000 Z3: Many Mods.
    - 2003 VW Jetta TDI Manual 47-50mpg
    - 1999 S52 Estoril M Coupe
    - 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
    - 2019 M2 Competition, self-tuned, 504whp
    - 2016 Mini Cooper S

  3. #3
    Join Date
    Mar 2018
    Location
    Germany
    Posts
    6
    My Cars
    1996 BMW 316i Sedan
    I did everything properly. Didn't DIY this.

  4. #4
    Join Date
    Jul 2004
    Location
    Houston, TX
    Posts
    12,462
    My Cars
    36 Cylinders
    Then you should verify your tune with a wideband lambda sensor. Stalling is often due to running very lean.
    -Abel

    - E36 328is ~210-220whp: Lots of Mods.
    - 2000 Z3: Many Mods.
    - 2003 VW Jetta TDI Manual 47-50mpg
    - 1999 S52 Estoril M Coupe
    - 2014 328d Wagon, self-tuned, 270hp/430ft-lbs
    - 2019 M2 Competition, self-tuned, 504whp
    - 2016 Mini Cooper S

  5. #5
    Join Date
    Jul 2013
    Location
    Casablanca, Morocco
    Posts
    780
    My Cars
    2001 e46 323i
    +1 on what 328Power04 said. Larger MAF sensor (with matching table in DME) or at least a rescale of the original, larger cams if they're restrictive, fuel and ignition tune, possibly colder plugs, higher flowing cats or cats delete...basically the whole air/fuel/ignition systems need to be upgraded accordingly wherever necessary and a remap is a must. No matter who did it there are requirements that need to be factored in.
    Last edited by Breeze1; 06-15-2019 at 09:14 PM.

  6. #6
    Join Date
    Mar 2018
    Location
    Germany
    Posts
    6
    My Cars
    1996 BMW 316i Sedan
    I got a bigger CAT (200), fiat punto gt fuel injectors, bigger maf from a BMW e30 M3. I got a bigger fuel pump too. 250lph. Subaru spark cables. Iridium spark plugs and ignition coils from a 6 cylinder. Is a wideband sensor gonna help?

    Ps. Most of the idle problem happens when I have the a/c on.
    Last edited by Teru; 06-16-2019 at 03:42 PM.

  7. #7
    Join Date
    Jul 2013
    Location
    Casablanca, Morocco
    Posts
    780
    My Cars
    2001 e46 323i
    Then it's likely your "idle speed with ac on" table hasn't been tuned (you could ask confirmation), or your idle speed tables altogether. And from what you said, did you get it tuned at all? If not, don't look any further and avoid driving the car as much as possible (and not hard by any means) before getting a tune.
    Last edited by Breeze1; 06-17-2019 at 11:41 AM.

  8. #8
    Join Date
    Mar 2018
    Location
    Germany
    Posts
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    My Cars
    1996 BMW 316i Sedan
    It is tuned. And properly. The problem seems to be something else. Now the idle problem happens more even without the a.c. on.

  9. #9
    Join Date
    Jul 2013
    Location
    Casablanca, Morocco
    Posts
    780
    My Cars
    2001 e46 323i
    Then I'd say focus on the idle: it seems as if it's not getting enough air while idling (the additional load put on by the AC sounds like a confirmation of that). Either the idle tables were not tuned or tuned properly (doesn't mean the tuner is bad: mistakes can happen) or there is an issue with the ICV itself.

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