huge mpg loss (among other issues)
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This is a discussion on huge mpg loss (among other issues) within the General Maintenance, Troubleshooting & Accidents. forums, part of the Tech & Modifying & General Repairs category; So I bought my 08 WRX about 6 weeks ago. It had 46k miles and has 47.8k now. I have ...

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    huge mpg loss (among other issues)

    So I bought my 08 WRX about 6 weeks ago. It had 46k miles and has 47.8k now. I have done an oil change and coolant flush. A couple weeks later a P1071 code came up (system running too lean) popped the hood and my COBB intake (on the car when I got it) seemed loose so I tightened it and it went away. But now my car seems to have lost a slightly noticeable amount of power and my turbo flutters. By that I mean when I coast at 3.5k rpm and punch it my rpms will flutter all the way up until I change gears. Also the car has always seemed to idle a little rough. I've been told turbo leak, inlet leak, and spark plugs. Haven't been able to find much relevant info online. TODAY I got in my car and the MPG gauge on my dash read 15.3mpg when it has always been 19.2. Anyone had this same issue before?
    Clever girl...

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    He simply abides. SD_GR's Avatar
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    Clean the MAF. Find any/all boost and vacuum leaks, and fix them. Make sure the air filter and intake are clean on the inside. The spark plugs are not due for replacement.
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    Moderator Donkey's Avatar
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    Never use the MPG gauge. It's worthless. Use the "fill up" method. Also reset your ECU to clear the fuel trims.
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    Quote Originally Posted by Ctripp1992 View Post
    So I bought my 08 WRX about 6 weeks ago. It had 46k miles and has 47.8k now. I have done an oil change and coolant flush. A couple weeks later a P1071 code came up (system running too lean) popped the hood and my COBB intake (on the car when I got it) seemed loose so I tightened it and it went away. But now my car seems to have lost a slightly noticeable amount of power and my turbo flutters. By that I mean when I coast at 3.5k rpm and punch it my rpms will flutter all the way up until I change gears. Also the car has always seemed to idle a little rough. I've been told turbo leak, inlet leak, and spark plugs. Haven't been able to find much relevant info online. TODAY I got in my car and the MPG gauge on my dash read 15.3mpg when it has always been 19.2. Anyone had this same issue before?
    Any other mods on the car? Is the car tuned to supports such items like the intake?

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