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Thread: Red hot manifold

  1. #1

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    1988 Mitsubishi Mighty Max
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    G63B

    Red hot manifold

    So I know these 2.0's put out huge power and its probably a normal problem for everyone (sarcasm if you didnt catch on).

    I picked up my 88 Mighty Max about 2 1/2 months ago and have been tinkering with it since I've had it here and there. One of the P/O actually put a Weber and elec fuel pump on already. I've owned older Fords since I've been 16, and just want to make sure everything is done right the first time with this truck. Im not used to such simplicity with the truck and I love it. Anyways I had to replace the elec fuel pump, put on a turn dial fuel press. reg. (for now, want to get one with a fuel return). I have the pressure reg set at 1.5 psi, turned down the fuel mixture scew to the carb. Im new to these Webers. I realize I could be running it lean, but it still diesels when i turn the engine off and a loud pop most of the time out of the tailpipe. So with it either running lean or timing could possibly be off, is there any advance that I have to unplug for timing and what is the factory spec?

    Thanks for the help.

  2. #2

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    With that little fuel and the manifold getting red hot, it's likely running dangerously lean, be careful. Bump fuel pressure up to 3-4 PSI and follow the lean best idle calibration. Factory spec is 5*BTDC, disconnect and cap the vac advance line. You can (usually) safely advance an additional 3-5* depending on the truck's mechanical condition but get it running well at 5* first.

    http://www.carburetion.com/Weber/adjust.htm
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  3. #3



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    Plugged jet, low float level, but a Vacuum leek, Thats for sure.
    Only an Indy car should glow red hot. Perhaps you got one of "them" cross dressing D50's.
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  4. #4

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  5. #5

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    Read your plugs, too.
    I can help get your truck to pass California smog! PM me.
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  6. #6

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    Thanks for the help, I'm stuck at work right now but went out and set 3psi on the regulator, tuned the carb to a baseline to get home so I'm not running to lean/rich. When I get home I'll get out the timing light and check the plugs. Sorry if the post was confusing/all over the place, beer kinda sounded good after a long frustrating day haha.

  7. #7

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    Try this guide too if you're getting frustrated:

    http://www.carburetion.com/troubleshoot.htm
    I can help get your truck to pass California smog! PM me.
    California BAR Smog Inspector License #EO635469
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