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95 mustang gt 5.0 failing 1 test in emission high nitro oxide plz help

1K views 4 replies 3 participants last post by  Trojan Horse 
#1 ·
please help my timing is correct, i not sure if coolant is full but im going to check it now. I failing emissions because the combustion chamber is hotter than normal. its not hot to me i mean temp guage is fine, but apparently its beyond the limit for passing emission please help.
 
#5 ·
Clogged converters or smog pump defective?
Run some gasoline/ethanol mix. The alcohol burns cleaner than the higher octane fuels.
Do not ****** the timing much (2° max), that will also cause it to heat up.
 
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