smog is coming up, and im pretty sure i won't pass.
i think my car is running extra rich, and im wondering if any of this sounds familiar to you guys:
the car is a 1991 miata, 140k mi, and the only mods include an intake; the exhaust is stock and im running a jackson racing cat that is a few years old now.
problem:
the exhaust pops under deceleration, and is full of black soot. someone also told me that it smokes black under deceleration.
also, im losing oil- up to a quart every 800 miles or so but the car isn't leaking from anywhere and all the seals have been replaced. this raises my suspicion that the car may be running too rich and the unburnt gas is possibly washing oil from the cylinder walls during the exhaust stroke (which then causes the pop i hear under deceleration). does that sound right?
this may have been going on for a while, and may have ruined my cat, which is why i am starting to hear the popping and getting black smoke now as opposed to before.
note: the plugs and wires have been replaced not too long ago, and the car feels normal in regards to power.
share your thoughts guys- i have smog coming up in a few weeks D:
i think my car is running extra rich, and im wondering if any of this sounds familiar to you guys:
the car is a 1991 miata, 140k mi, and the only mods include an intake; the exhaust is stock and im running a jackson racing cat that is a few years old now.
problem:
the exhaust pops under deceleration, and is full of black soot. someone also told me that it smokes black under deceleration.
also, im losing oil- up to a quart every 800 miles or so but the car isn't leaking from anywhere and all the seals have been replaced. this raises my suspicion that the car may be running too rich and the unburnt gas is possibly washing oil from the cylinder walls during the exhaust stroke (which then causes the pop i hear under deceleration). does that sound right?
this may have been going on for a while, and may have ruined my cat, which is why i am starting to hear the popping and getting black smoke now as opposed to before.
note: the plugs and wires have been replaced not too long ago, and the car feels normal in regards to power.
share your thoughts guys- i have smog coming up in a few weeks D: