Alright i need to go do emmisions, but my Check engine light keeps coming on.i have an obd0 civic, so does it matter if it comes on.it only pops on when im in a gear just coasting without touching the gas.One of my buddys said his car did that then he put fuel injector cleaner, and tranny fluid in a bottle, mixted it up then poured it in a vac line and it went away.
Any suggestions??