Thread: 91 Civic DX
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Old 05-18-2011, 09:49 AM   #4 (permalink)
Ryland
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Location: Western Wisconsin
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honda cb125 - '74 Honda CB 125 S1
90 day: 79.71 mpg (US)

green wedge - '81 Commuter Vehicles Inc. Commuti-Car

Blue VX - '93 Honda Civic VX
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Quote:
Originally Posted by mikeiorga View Post
Also been considering putting headers and a large exhaust as well as a bigger intake since all that stuff is pretty cheap for it. Any suggestions for or against?
If you want to see a drop in your mileage and power then a larger exhaust will do that for sure, for that car stock exhaust from the dealership is your best option, it fits right, it gives the best mileage and it has a warranty for as long as you own the car.

Your fuel injectors are 20 years old so altho replacing them might be over kill it might be worth pulling them out and cleaning them up, or running some fuel system cleaner.
If everything else is working ok tho, my first thought with soot in the exhaust is a bad o2 sensor, even tho you have a check engine light it will take forever for it to trip from the o2 sensor.
Last thing is your transmission fluid, when the car was new it called for straight 10w30 motor oil and is supposed to be changed every two years, I tend to use 0w30 in mine because it gets cold here, but you can get a synthetic MTF from the dealership and it should last longer then the 2 years that the motor oil would.
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