1984 Chevy Corvette Check engine light does not flash

Hello -

I have attached info on the light. If it doesn't come on it requires maintenance and should have thrown a code.

Please go to Auto Zone or O'Reilly's and for FREE they can pull the codes to the car. Most important: Once they check your codes, if they find something and you don't get it fixed and need to get back with us, please make sure you tell us exactly what the code was, number and all. Example, if the code was E0568 O2 Sensor bad. Then make sure you give us all of that. While there for FREE also they can bring their tester out and check your battery, alternator and starter.

Hello - littlelola

I am sorry about the replies not meeting your needs. That is frustrating especially since you have donated..... Twice...I appoligize

I searched through about 459 Technical Service Bulletins and there is nothing in there about this problem.

I did find the information below, but you will need an auto electrical shop or the dealer to do the circuit checks unless you are able to do them yourself which you may be able to since I don't know your background.

Also, you said you replaced the ECM, there is a note at the bottom you will see that states: Before replacing ECM, measure resistance between solenoid terminals of canister purge, air switch and air divert solenoids. Replace any solenoid which measures less than 20 ohms resistance

I hope this answers your question better. If not, please get back with me and we will do what we can.

No ``Check Engine'' Light

Notes

With ignition on and engine off, connect test lamp between white ECM connector pin 20 and 12 volt power source.

If test lamp lights, inspect ``Check Engine'' light bulb and replace if necessary. If bulb is satisfactory, check circuits 1 and 419 for an open and repair as necessary.

If test lamp does not light, connect test lamp between white ECM connector pin 16 and ground. If lamp does not light, check circuit 439 for open or short and repair as necessary.

If test lamp lights, connect lamp between white ECM connector pin 10 or 15 and ground. If test lamp does not light, check continuous battery circuit for an open or short and repair as necessary.

If test lamp at pin 10 or 15 lights, check ECM engine ground circuits 450 and 450R for an open or short and repair as necessary. If circuits are satisfactory, fault is in ECM or ECM connector. Repair or replace as necessary.

Before replacing ECM, measure resistance between solenoid terminals of canister purge, air switch and air divert solenoids. Replace any solenoid which measures less than 20 ohms resistance

Hello -

Thanks 69corvette

Not only do we, but I am sure she appreciates the advice.