bad gas milage

GhettoPop · 04-22-2003, 08:26 AM

i usually make around 13 mpg in my stock 90 GT w/ 114k in NYC. I now make only about 11. The car has fairly new plugs, wires, cap, rotor, fuel filter, air filter. Timing should be good. I was making good mpg after all these items were replaced but recently my mpg has gone done. Any ideas? I was thinking maybe O2 sensor?

V8Mustang · 04-22-2003, 07:09 PM

Check for codes. Some say replace the o2s every 60K or so but I've had 3 5.0s with well over that many miles on their o2s and they get good mileage (could be better w/ new o2s I'm sure). They do become less sensitive over time.

04-22-2003, 08:26 AM	#1
GhettoPop Gimme a Drink! Join Date: Dec 2002 Location: NYC Posts: 694	bad gas milage i usually make around 13 mpg in my stock 90 GT w/ 114k in NYC. I now make only about 11. The car has fairly new plugs, wires, cap, rotor, fuel filter, air filter. Timing should be good. I was making good mpg after all these items were replaced but recently my mpg has gone done. Any ideas? I was thinking maybe O2 sensor?

04-22-2003, 07:09 PM	#2
V8Mustang Registered Member Join Date: Mar 2003 Location: NC Posts: 64	Check for codes. Some say replace the o2s every 60K or so but I've had 3 5.0s with well over that many miles on their o2s and they get good mileage (could be better w/ new o2s I'm sure). They do become less sensitive over time. __________________ www.CRmotorsports.com Ford Performance Parts

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