How can i fix my car so it wont be running rich all the time?

i have a 1987 Toyota Supra 3.0L Non Turbo Engine Electronic fuel injection, so far all i did was wash the engine bay with a high pressure hose, and change the air filter and it is still running rich, i can smell the gas fumes while driving with windows down. what else can i do and give me an estimate for the cost of a repair to fix this problem thanks.How can i fix my car so it wont be running rich all the time?does it smell like raw gas like you have a leak if you have a gas leak you are gonna want that fixed right away, if it is truly running rich then it may be a o2 sensorHow can i fix my car so it wont be running rich all the time?do a full tune up. spark plugs, plug wires, cap %26amp; rotor, fuel filter. then have a full diagnostic run on the car at a repair shop.How can i fix my car so it wont be running rich all the time?you might try having the computer scanned to see if there's any bad sensors on it a bad 0-2 sensor will make one run real rich,good luck.How can i fix my car so it wont be running rich all the time?Take the car to a repair shop. Sounds like you blew a hole in a gas line.How can i fix my car so it wont be running rich all the time?Having trouble seeing price, psychic image kinda fuzzy, try again later.How can i fix my car so it wont be running rich all the time?could you describe the odor? sounds like a broken gas line to me!