engine light
There are hundreds of different codes that can cause the check engine light to come on. It needs to have a code reader hooked up to find out the specific code. Most auto parts stores will do this for free.
That is the same as the check engine light. You will need to have the system checked for codes to know possible causes.
There are pages and pages of things that can cause a check engine light. You need to have it checked with a scantool. Then the code can be diagnosed and repaired.
The engine codes for gasoline engines in the 1985 Chevy Celebrity: 2.5L 4 cylinder engine code R 2.8L V6 mpfi code w 2.8L V6 carburettor code x
Check at the battery with a volt meter, Should have over 14 volts when engine is running. If not, possibly have to replace the alt. or check all the wires.
a plug misfiring would cause the rough idle and check engine light or if u changed the plugs and wires u could have put the plug wires in the wrong order
First fix whatever the problem is. That alone oughta turn the light off. Otherwise, either disconnect the battery for a minute or so, or remove the 15A EFI fuse #12 in the engine compartment fuse box for a minute or so.
With a scan tool or by unhooking the battery.
the dipstick is near the back of the engine compartment. Check while at running temp
That is exactly what it is suppose to do. This allows you to check and see if the lights are working properly. If they did not come on and then go off when you start the engine, you would never know if the bulbs were working properly.
Diagnosis: Engine Won't Start or Run Check related link below