92cobra

Ok. So I am officially lost. Generally I get about 280-320miles to a tank of gas. Now for the last 4 or 5 tanks of gas I am only getting 180-200tops. I cant figure this out. Why have i lost so many miles to the tank?

I have not recently done any mods to the car, I just awoke one day, and had terrible gas milage. Less then a year ago I did a full tune up including, plugs, wires, cap, rotor, o2 sensors, egr valve, tfi module, oil, oil filter, water pump, power steering pump, alternator, etc.

The car is pretty much stock. I have cleaned the maf, tb, iac, everything. I cant think of ANYTHING besides a gas leak that would cause me to lose over 100 miles to a tank of gas.

I have no other symptoms, no check engine light. Car runs great, just terrible gas milage suddenly. Any clues?

mjr46

have you run a koeo/koer test yet??

92cobra

I had the codes ran at autozone awhile ago and forgot what they were. I know 2 were egr codes and one was a fuel out of range code due to the other two egr codes.

I will have them run the codes again and write down the numbers this time. Im thinking the extremely cold weather has some to do with it, but to lose THAT much, im thinking gas leak, but I cant find one. The o2 sensors are newish, im racking my brain on this one brother.