Symptoms of a Rich-Running Car

could burn a valve or ruin a piston ring over time, leaves your exhaust tip BLACK, backfiring.....etc etc etc
 
Lower A/F ratio readings on your WBO2 gauge.

Your spark plugs will also have carbon deposits all over them.
 
plugs.jpg


my plugs from my N/A rich running P5. sure your will look more black and more sot on them.....

this is about 8K miles on them compared to a new one on the left!
 
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