ok guys i have a serious problem...i just put in 18 gallons of gas and after only 69 miles i am down to a 1/4 tank. my car has had a ruff idle, and the right exhaust has been blowing major exhaust but the left side is working fine...at one point my fuel injector on cylinder 2 was bad but i replaced it...my cadellic coverter was cracked and i replaced the exhaust with true duals...i also added new sparkplugs and wires. i also got a code where it said that the MAF sensor was bad. could that make a major difference in my situation. well i have one here and i am putting it in tonight. what the hell is going on with my car. i cant figure it out...does anyone have any ideas? i am thinking maybe a valve is sticking or bad....i am not sure..anything advice would be nice.