What is your question?
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What is your question?
I recently drove from MA to FL in my 05 mustang gt (k&n intake,borla exhaust add-ons) Prior to driving here the fuel filter had been replaced as well as all replaced all my spark plugs and cleaned out the air filter. Once i got to FL i had my gas mileage up to 20 mpg..I normally average about 17-18 and everything was running fine. A month later my check engine light came on and my gas mileage started decreasing by the day. I am currently at 15mpg which is very out of the ordinary for my car. When i come to a stop light the car will start to idle very hard, almost feeling like it will stall out when you go to step on the gas again and rumbles. I had the code checked but lost the paper, i believe a few different things came up, possible o2 sensor, a/f ratio etc...not exactly sure. I have been told that a common problem is the fuel regulator. Any ideas? please help
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Really, you NEED that code. When the Check Engine Light comes on, it is because the computer system that controls your engine is malfunctioning, and will not be able use fuel properly. Yes, it could any of those things, BUT the code will tell you for sure, so you won't have to guess.