Question about 1993 Oldsmobile Cutlass Ciera

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Excessive emission - 1993 Oldsmobile Cutlass Ciera

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Tune ups can radically change emission output due to the burn ratios. By burn ratios I mean the ratio of air, fuel mixture and time/amount of spark. If your burning to much or not enough fuel due to one of the fore mentioned it can cause nasty emissions. Not enough spark causes the ignition of the fuel to be delayed and hence a increase in the amount of fuel burned upon ignition, which increases bad emissions. Exhaust leaks or the catalytic convertor being well used are both culprits also. Exhaust leaks cause particles within normal emissions to solidify within the exhaust (most commonly carbon) then down the line they heat up and burn away into bad emissions. There is always some carbon build up within the exhaust system which is what the catalytic convertor is for. It acts as a filter to scrub away the carbon and other nasty particulates from the exhaust gases. Some of the particulates within will burn up due to normal use and create bad exhaust so when the convertor has a significant build up it needs to be replaced. A plugged catalytic convertor forces the engine to burn exhaust with the air and fuel when mixing which is not a good idea because it retards the engine (definitely bad for the environment and the engine - and the pocket book). I have seen a cheap and seemingly mundane fix work on numerous occasion, simply replace the gas cap. It has to due with the cap making a seal. If it does not seal properly the tank can suck in air during usage which lets more air into the fuel lines when pumped, which in turn increases the air to fuel mixture when sparked. That is always the cheapest fix but keeping up all other things with regular maintenance all really help the environment. Without proper testing it is impossible to guess what the actual culprit is but I hope this has helped both you and the environment.

Posted on Mar 24, 2014


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