1994 Chevrolet Lumina Q&A
1994 Chevrolet Lumina Question: Check engine light
Check engine light comes on ONLY when driving at high speed when I let off the gas feed. Like the interstate. When cold, it acts like a spark plug missing or fuel interruption but gets better after warm-up. There's a foul odor and raw gas smell at the tail pipe, but not always. Had the car checked for leaks. None found. Starts fine and has good power. Gas mileage is good. Replaced,oxygen sensor, plugs, wires,fuel filter, and other parts. Had fuel pump checked and it's ok. The only 3 things left(I think) are the idle air control valve, coil, and injectors. Going after the injectors next. Car has 108,000. Any help will be appreciated. - David Fisher
I think you are going after this problem backwards. There are various reasons for the check engine light to illuminate. It's always best to pull the code first to see what the problem is and then diagnose why the system is setting that particular code. - rdude135
for all the people thats having proplems with light that stay on. change the gas to 97 oct and tighten the gas cap. if it does not go off dis connect the possive side battry for about 5 mins .this will reprogram the computer.thanks frank - Visitor
Can be the cam shaft, the cam shaft follower of the fuel pump. You are lucky to have the engine running. Get rid of the car. - Visitor
Take your car to Autozone where they will check free of charge, the codes for your problem. Also AAMCO does this as well--for free. mcstanley - mcstanley
whats funny is my 89 caprice classic does the same thing that your lumina does..if i drive around the city, the light does not come on...if i hop on the interstate, better believe within 10 mins it is shining bright. but...i did not have this problem UNTIL i changed the fuel filter, fuel pump, and the O2 sensor all at once..so i was thinking to change the O2 sensor and it may go away...it didnt. Unplugging the pos side of the battery did no good.. some people told me to replace the EGR valve that was no good, but was still hooked up..while the new one was hooked up, the check engine light came on 3 days later. so i figured that was not it. Autozone will not get me a diagnostics because my car is too old; so i keep guessing as you do..still avoid the interstate as well if i can...maybe i can find a person who is very knowlegable about my caprice and will not keep me guessing... - ladytb
catalyst convertor problem - Visitor
the code i am getting from my aunts car doing the exact same thing was code 32 - The ECM codes book states it could be three things or one of the three...(1)a barometric pressure (BARO) sensor circuit failure, (2)a an Exhaust gas recirulation(EGR) valve diagnostic switch that is closed during the engine start up(not the case) or open when EGR flow requested by ECM or (3) Electronic vacuum regulator valve (EVRV) error (EVRV controls the EGR vacuum) - hope this helps someone - grf99
I had the exact same problem along with a few other issues with my 1990 Lumina. The check engine light was easily fixed by cleaning the mass air flow sensor. It only cost me $10 to get rid of that problem. My car drives and idles better and my check engine light is gone and has not come back. The car used to loose power when accelerating, stall when stopping, idle very high, and had a fuel smell because of it running very rich. I had countless mechanics look at the car and check the codes and they could not figure it out. So I did some research and found the problem myself. I have no faith in mechanics because I have always had better luck figuring car issues out myself. My advice is clean the mass air flow sensor and see what happens it is cheap and easy. The sensor is usually on top of the engine and is only attached with two bolts. Start at your air filter and follow the system up and your sensor should be there somewhere. - als2986
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