Cool 1991 Honda Civic Check Engine Light Ideas. After washing the engine the check engine light comes on shortly after the engine is running and will not advance over 3500 rpm. This is how i checked my 1990 ef sedans check engine it’s stock d15 if it’s obd1 it’s different lights will flash on the cluster i.
It can indicate various problems, including issues with the fuel system, catalytic converter,. The resistance on the iacv was out of whack, about 2 ohms, and then i cleaned and reset the main ground under the battery. How long can you drive with your check engine light on?
