Question about 1994 Chevrolet S-10

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Catalytic converter i was wondering if taking a catlytic converter of would improve gas mileage and if so, what else would happen?

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I replaced my cat with a high flow cat and flowmaster 40 series exhaust about 4 years ago now. good set up on my 2.2L 4cyl 5spd. sounds excellent. the only problem, since it is a high flow cat and free flowing exhaust, there is little if any back pressure, and so i really dont have that much torque anymore. it actually made my truck slower on the bottom end. not that the 2.2L is a speed demon. lol. you could probably get away with a test pipe that is still the same size as the stock pipe and it will sound gread. as far as gas mileage, i doubt it will do anything to help. my exhaust didnt help my gas mileage any. the only thing ive noticed that got me more mileage is replacing the stock air filter with a drop in K&N filter. i got about 5 more miles a gallon just by doing that. good luck.

Posted on Sep 05, 2008


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I have noticed when imtrying to speed up the car will putt and will flash the check engine light comes on I am not getting good gas mileage

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you could change the exhaust to a free flowing muffler. Should pay for itself after a a few tankfulls. Increasing the diameter of the exhaust pipe after the catalytic converter by one size will be helpful. If you have a 1.25" diameter pipe going into converter and then going to 1.5" after the converter.

This is what is known as a cat back modification. Should be cheap to have done at an exhaust shop for an F150.

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check O2 Sensors, add a product called Ametech restore at next oil change, this does wonders for your vehicle, improved my BHP & MPG threefold , also as you say it smells bad (Like rotten eggs?) this will be the catalytic converter, either replace or add a product called cataclean to the fuel & take it for a run, It literally cleans all the **** fro the catalytic converter removing that rotten egg smell

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