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Thread: 4d55 started misfiring and smoking horrendously

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  1. #1

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    06-15-2014
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    6,059
    Location

    Adelaide, South Australia
    Vehicle

    1985 Mitsubishi L200
    Engine

    G63B
    Modifying the turbo won't increase boost - but it will increase the amount of boost the turbo can support. And this kind of mod whether it be on a diesel or gas engine will require extra fuel with the increase of boost to prevent lean out. Are you going for an in cabin boost adjustable control or resetting the boost and leaving it?

  2. #2

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    08-14-2014
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    35
    Location

    Port Angeles, WA
    Vehicle

    1983 Dodge Power Ram 50
    Engine

    4D56-T
    Quote Originally Posted by geezer101 View Post
    Modifying the turbo won't increase boost - but it will increase the amount of boost the turbo can support. And this kind of mod whether it be on a diesel or gas engine will require extra fuel with the increase of boost to prevent lean out. Are you going for an in cabin boost adjustable control or resetting the boost and leaving it?
    I'd like to have in cabin boost control but that will all depend on what wastegate bits I get with the turbo. The shop in Van Nuys is setting up the turbo with no wastegate, but they said they'd send me all the parts to reinstall it. Apparently I'll need to make an adapter for the manifold in order to use it. I'll see what shows up in the mail and whether or not I'll be able to install the wastegate or will have to run without.

    I was actually in the process of installing a homebrew in cabin fuel controller. I purchased a servo and servo controller along with a couple gears. I was going to attach the servo to the injection pump and gear it to the fuel screw. That way I could adjust fuel from in the cabin. However, having just had the pump rebuilt, I plan to hold off on this for awhile.

    This diesel stuff is a learning experience for me, but I'm taking it slow and steady. I've installed a new aluminum radiator, electric fan, intercooler, working on a new exhaust, and I'll be installing an EGT gauge this weekend. Hopefully with all those modifications I can try and turn the power up while keeping it cool and happy. I'm really hoping for a reliable daily driver that I can take up to the mountain trails, and hopefully have enough power to pass a car on occasion, haha.

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