1993 G-20 emissions problem

GA VAN GUY

MEMBER
1993 CHEVROLET VAN

The vehicle above has a persistant black smoke problem. I have replaced about everything I can think of short of the ECM. Is there a way to find if the current ECM is the correct one for the vehicle? I have been told by a dealership that they can reference it by vin #, but they will not tell me anything beyond the price of the part. I would like to find out if the correct computer is in the vehicle.

THX for any help you can post, I am really having a time with this stubborn van. And I am running out of time for the emissions test. :(

THX again in advance for any help that you can post!

1 Reply

BOBBYL1966

MEMBER
5 POSTS

Hello I am not mechanic but I have to say use paper clip for read the codes in your van if any. When the key is in off position put the two ends of the paper clip in the obdi connector is in under the dash in the steering area right side of the steering. The A AND B is in the upper right side in the obdi connector. After turn the key in on position but without start the engine look in the check engine light. The engine lights start make flashes. One short flash and after follow for two more flashes is code 12 this mean the computer not have stored any codes. If after you see more codes write down how many times the engine lights flash and look on the internet for OBDI codes what mean any flash. For example my van show codes. 3 flashes and follow from 7 more flashes is code 37 tcc brake switch stuck on. 3 flashes follow from 8 more flashes tcc brake switch stuck off 4 flashes follow 4 more flashes is code 44 lean exhaust. I hope my answer help you. Answer me when you found what wrong part is in your van