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JCMack's avatar
JCMack
Explorer
May 05, 2016

help my 8.1 engine will not pass emissions test in canada

had to get an emission test on my 05 mountain aire with the work horse chasis and the 8.1 engine. the tech. said the engine is running way to rich to which i have to agree as the exhaust smells like i...
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carringb's avatar
carringb
Explorer
May 05, 2016
How long since the spark plugs were changed? Ratio can still be ok, but it won't burn all the fuel causing high hydrocarbon emissions, if the plugs are worn out, wires are bad, or otherwise isn't getting strong spark. What about other maintenance? Is the air cleaner ok?

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