GRAND CANNOT PASS EMISSIONS TESTING
1987 Mercury Marquis • V8 2WD Automatic • 132,000 miles
1987 Mercury Grand Marquis mileage: 132,000. I cannot pass emissions testing. I first brought my car in and failed on HC and CO. About a week later I tried again burning premium fuel and after adding some emission system cleaner. I was still high on CO and HC. So then, I changed the air filter spark plugs and ignition wires. I then went back and tested again. I added some rubbing alcohol to my fuel tank to try to get it to burn a bit cleaner. My CO and HC jumped about 50% each. I do not want to sink too much money into this car. What should I do? Oxygen Sensor? Get the computer checked?
After reading your question and test results, we would suggest installing a new catalytic converter.
I just bought a 2004 Ford Focus ZTS with a 2.3 Liter I4 PZEV motor - according to the Owners Guide...
9 answers • 1997 Ford Taurus • 140,000 miles
I recent had the air filter in my 2003 oldsmobile alero changed and now the car seems to***** when I...
2 answers • 2003 Oldsmobile Alero
How do you change the air filter on a Chevrolet Prizm
1 answer • 2001 Chevrolet Prizm • 109,000 miles