mazda b2200 spark plugs


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Old 07-12-07, 10:00 AM
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mazda b2200 spark plugs

thought i would start a new thread on this one...

in the midst of looking at the oil light flickering in my previous post, i decided to take a look at the spark plugs...

this is what i found...all 4 spark plugs are really black at the business end...dry, sooty like build-up...nothing wet...i checked them after the truck sit over night...would it be better to check them after i have driven it???

the threads were a little oily, but the end that sticks into the firing chamber was dry, black, sooty, with buildup...i could chip some of the black buildup off...

what does this mean and what should my next step be...

thanks...michael
 
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Old 07-12-07, 10:56 AM
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Black sooty plugs are a indication of your engine running rich. Fuel is not being burned correctly. This could be a sign of a ignition problem to begin with.
 
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Old 07-12-07, 12:17 PM
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running rich

could this also be a reason my gas mileage has declined and sometimes i smell gas at startup???

would a tune up help the problem???
 
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Old 07-12-07, 01:56 PM
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tune up will help your fuel milage, also change your air filter.is it a carb or throttle body or fuel injected?
 
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Old 07-12-07, 02:10 PM
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carb

it is carb...i just talked to a mechanic...he told me it is a sealed carb that is adjusted at the factory...it can't be adjusted...

does that sound correct???

1991 mazda b2200 2.2 L carb
 
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Old 07-12-07, 03:53 PM
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Carbs I have grow up with all have chokes. Chokes self adjust with cold and heat. Sometimes they go out of adjustment and stay closed or partially closed and you have to readjust them. Take a look. See where it starts out when cold. Then let it run and see if it opens up all the way, when it gets warm. Also make sure that if you have PCV valve (Positive crankcase ventilation) that it works. Also make sure your engine timing is correct and is not severly retarded.
 
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Old 07-12-07, 06:34 PM
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Choke on a mazda carb MAY be triggered by coolant temp...........If someone has removed the thermostat or eplaced it with a lower value one THAT can be a problem..........As far as the sealed carb is concerned.........The adjusting screws are there...They just have caps hiding their location.........Purpose is to keep unskilled fingers away from adjustments which will alter emissions
 
 

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