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ten bucks says the catalytic convert is just about fully clogged up.
supporting symptoms: poor performance gradually increased; poor acceleration; check engine light on; will start and run ok cold, but poorly after 10 mins (ie just about the time the engine and therefore exhaust get hot); mileage on vehicle.
if left uncorrected, eventually (probably soon) the vehicle wont even start.
test to confirm diagnosis: disconnect exhaust manifold and start vehicle. let run at least 15 mins (long enough to get hot). now try to rev the engine. it if will rev up without trouble, you have just confirmed diagnosis.
solutions: legal - replace catalytic converter; illegal (in most/all? states) - remove converter and punch out ceramic core material, then reinstall.
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He's the best, of course, of all the worst.
Some wrong been done, he done it first. -fz
I jus' want ta thank you...falettinme...be mice elf...agin...
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