1. This site uses cookies. By continuing to use this site, you are agreeing to our use of cookies. Learn More.

84 300td in a jeep looking for more power

Discussion in 'Mercedes Benz Diesels' started by Philip1, May 30, 2019.

  1. Philip1

    Philip1 Registered User

    Posts:
    3
    Likes Received:
    0
    Joined:
    Apr 1, 2019
    Location:
    Nevada
    I got what I believe to be the 300td (5 cylinder with turbo) in a jeep yj and I was wondering if there is a fuel adjustment screw similar to the old Ford idiot's to turn up the fuel
     
  2. saburai

    saburai Full Access Member

    Posts:
    1,249
    Likes Received:
    463
    Joined:
    Mar 15, 2016
    Location:
    Bokeelia Florida/Catskill mountains NY
    Welcome to the forum. More than likely the engine is a OM 617.
     
  3. Cactus Bob

    Cactus Bob Registered User

    Posts:
    26
    Likes Received:
    16
    Joined:
    Jun 12, 2010
    Location:
    STRAWBERRY, ARIZONA
    remove your "alda" and put a washer under it.
    thin washer= a little extra fuel
    thick washer = a lot of extra fuel
    2 thin washers too much fuel.
    be careful a little thickness goes a long way.

    DO NOT TRY TO ADJUST THE ALDA these are all old and plastic and old rubber inside you mess with them and it will break every time. put a washer under it and be happy with your fingers crossed of course.
     
    Last edited: May 30, 2019
  4. Shadetreemechanic

    Shadetreemechanic Full Access Member

    Posts:
    1,556
    Likes Received:
    125
    Joined:
    Sep 16, 2007
    Location:
    Monteagle, TN
    The Alda matches fuel output with boost on these engines to keep them from overfueling before the turbo spins up. Shimming or adjusting will give it more fuel sooner.
    I have never shimmed one, only adjusted and never had one break, but I last adjusted one a decade ago so things in them may be more brittle now.
     
  5. Philip1

    Philip1 Registered User

    Posts:
    3
    Likes Received:
    0
    Joined:
    Apr 1, 2019
    Location:
    Nevada
    Thanks for the help guys. I just noticed the typo it was supposed to say the old Ford idi's. My bad.
     
  6. saburai

    saburai Full Access Member

    Posts:
    1,249
    Likes Received:
    463
    Joined:
    Mar 15, 2016
    Location:
    Bokeelia Florida/Catskill mountains NY
    Stick around we've got an idiot. He's anything but...
     
    Clb and DaveBen like this.
  7. Philip1

    Philip1 Registered User

    Posts:
    3
    Likes Received:
    0
    Joined:
    Apr 1, 2019
    Location:
    Nevada
    Looks like the alda was previously removed so it should be full flow all the time. Is there any other adjustment to give a little more power?
     
  8. Clb

    Clb Another old truck Supporting Member

    Posts:
    3,679
    Likes Received:
    434
    Joined:
    Mar 1, 2013
    Location:
    nannyfornia
    Fwiw???!
    I had a guy in my club go from a 22r to an re to a merc idi INSTANTLY to a 4.3...
    He had no more power than the re...
    Ymmv
    Now about
    @IDIoit
     
  9. Cactus Bob

    Cactus Bob Registered User

    Posts:
    26
    Likes Received:
    16
    Joined:
    Jun 12, 2010
    Location:
    STRAWBERRY, ARIZONA
    Missing the ALDA....now that's telling!
    Someone was trying to increase fuel and did the ultimate....removed it.
    the OM617's injection pump does reduce fuel delivery as it's wearing out, making the engine feel like a semi clogged fuel filter. you might just be dealing with this problem. other issues are worn rings. do you have blow by?
    another might be your expectations for that engine. the 617 was never a very powerful motor for it's size.
    Do you have smoke at night, in the headlights of the car behind you when taking off? you should see a little bit, but in daytime if you see ANY you are already running rich. or have ring issues. the om617 is a very clean engine when set up correctly and not worn out.

    If you decide to adjust the IP itself and can figure out the MB instructions to do this .....you are a better man than i.
     
    saburai likes this.
  10. IDIoit

    IDIoit MachinistFabricator Supporting Member

    Posts:
    12,284
    Likes Received:
    1,763
    Joined:
    Aug 26, 2014
    Location:
    commiefornia
    just drop a 7.3 IDI in it!
    this little 63 ranchero has all the power I could ever ask for....
    and now im going insane with fuel mods ;)

    Untitledqwed.png
     
    saburai likes this.
  11. saburai

    saburai Full Access Member

    Posts:
    1,249
    Likes Received:
    463
    Joined:
    Mar 15, 2016
    Location:
    Bokeelia Florida/Catskill mountains NY
    Fing awesome friend!
     
    IDIoit likes this.
  12. Shadetreemechanic

    Shadetreemechanic Full Access Member

    Posts:
    1,556
    Likes Received:
    125
    Joined:
    Sep 16, 2007
    Location:
    Monteagle, TN
    If you have smoke from the tail pipe, Next thing to do is delete the egr if it has not already been done.
    Have you checked your boost levels? This is a wastegated turbo so you want to see that it is functioning correctly.
    Also confirm that the alda boost sensor line was plugged when the alda came out. It was a line coming off of the back of the intake manifold.
     
  13. compressionignitionrules

    compressionignitionrules Full Access Member

    Posts:
    674
    Likes Received:
    177
    Joined:
    May 1, 2016
    Location:
    Bluevale ON
    have you checked the timing chain or tensioner yet. cam timing can really mess with your power output. one of the most neglected parts of these motors.
     
  14. nevrenufhp

    nevrenufhp torque junkie

    Age:
    47
    Posts:
    427
    Likes Received:
    4
    Joined:
    Feb 5, 2005
    Location:
    Sacramento
    turbodiesel and saburai like this.

Share This Page