Question about 1988 Honda Prelude

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Black smoke greetings, have a 1988 honda prelude . having problem with fuel system, smokes alots. bad carburation. also have ck engine light is on

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  • Dale Barrett
    Dale Barrett Feb 15, 2009

    I have a similar problem. I have worked on cars for a long time and agree that the rich fuel problem is the black smoke and light color smoke is oil or water issue. It would seem that my prelude has an issue with the choke sticking when cold. I have not had the time to find a fix for my car yet. First let me say that my car has side draft dual carb setup not the fuel injection. I have checked the hoses and they dont seem to have any cracks or breaks. What part of the carbs actuate the choke pulloff at startup? Whats the fix. Thanks...

  • Dale Barrett
    Dale Barrett May 11, 2010

    Thats what I said. I would like to know if someone has come across a solution to the problem of a sticking choke problem on the older Preludes with dual carbs.... Thanks....

  • angelsart248 May 11, 2010

    OH... duh! lol

    Black smoke is usually oil burning... not good! Is it possible that you recently put too much oil in during an oil change or something like that?? If that is the case it should burn itself off.

    Fuel smoke is generally blue or white (like ever gunned it and had a puff of white smoke come out?) so not sure the two are related??

    :0)


  • angelsart248 May 11, 2010

    what color is the smoke?

    :0)


  • Anonymous Mar 23, 2014

    engine check light is on. black smoke emmission and high fuel comsuption rate

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I have to disagree with diagnosis, sorry. Black smoke is rich mixture of fuel, & blue/white is oil and/or coolant .

Posted on Jan 30, 2009

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It appears that there is an issue with the carbs on the earlier model preludes that can cause this problem. Like the old Fords with the Holley or FoMoCo carbs there is a power valve (or similar valve) on the Honda Carbs. If one of these valves goes bad the car will run rich all of the time and really rich (black smoke) when you first start the car. This was explained to me by a Honda Tech I know at a dealership. The valve may or may not be bad but may not be receiving vac from the hoses correctly. I have not repaired mine yet but I will investigate it further and report back.

Posted on Apr 11, 2009

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hi nishga
im dave; hope i can help

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