1990 Honda Accord Owner's Manual - Page 130
1990 Honda Accord Manual
Page 130 highlights
Catalytic Converter A catalytic converter is installed in the exhaust system to help clean-up the harmful exhaust gases that can cause air pollution. To be effective, the converter must work at high temperature, so don't park your car over dry grass, leaves or anything else that could burn easily. To stay effective, the converter must not be contaminated by leaded gasoline; use only unleaded gas as explained on page 56. CATALYTIC CONVERTER CAUTION: The converter can be overheated and damaged if it's fed too much unburned fuel mixture from the engine, so: - Don't push or tow the car to start it; if the battery is dead, jump start the car as shown on page 116. - Don't turn the key off while the engine is running above idle speed. - Don't change the ignition timing, or remove any emission control parts. - Use only the spark plugs specified in this manual. - Don't keep driving your car if it isn't running properly, or if its CHARGE warning light comes on; have it checked by your Honda dealer.