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Old 05-09-2001, 06:48 AM   #1
Scooby Newbie
Member#: 1865
Join Date: Jul 2000
Location: Columbus, Ohio, USA
Question Am I crazy????

Okay, so the CE light on the RS came on last week. I took it in to the dealer yesterday, and he calls me back and tells me it was a bad AF (air flow?) sensor, and that they replaced it under warranty. Now, when I drive the car, I could swear it has better low-end pull. Am I crazy, or could this have improved the low-end torque of the car? Also, will it improve my gas mileage? I've been getting some low mileage since I got the car. It's got just over 7500 miles on it and I've been getting only around 20 m.p.g.. This is mostly city driving, but nonetheless, the sticker on the window said 21 city/29 highway. TIA.
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Old 05-09-2001, 07:44 AM   #2
Scooby Specialist
Member#: 3097
Join Date: Nov 2000
Chapter/Region: NWIC
Location: www.rs25.com Beaverton, OR
2013 Ford Focus ST
Performance Blue


Makes sense. If your air-flow sensor was bad, then the computer wasn't running the engine right, so the new sensor lets the car run correctly, hence more power. And I would wager that your gas milage will go up, also, unless you "enjoy" your new-found power too often
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Old 05-09-2001, 08:35 PM   #3
Scooby Specialist
Member#: 438
Join Date: Oct 1999
Chapter/Region: W. Canada
Location: St. Albert, AB, Canada
2004 STi
White on Gold


I was specifically told that when something like the O2 or AF Sensor goes, the car will run rich and worsen you gas mileage. This means your car was mildly bogging due to too much fuel.

Now that its fixed, your back to running you should be and likely a little HP to boot. I'm not surprised with your observations one iota.

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Old 05-09-2001, 09:14 PM   #4
Scooby Specialist
Member#: 3467
Join Date: Jan 2001
Location: Odenton, MD
1998 Dinan3


YES, you are crazy J/K. It would make sense that you would get more power from a new MAF. And you're lucky you didn't have to pay $330 for a new one.
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Old 05-09-2001, 09:16 PM   #5
Scooby Specialist
Member#: 1911
Join Date: Jul 2000
Location: Seattle, WA, USA
2000 Impreza 2.5RS
Silverthorn Metallic


MY00 Imprezas don't have MAFs. But yes, replacing a bad MAP sensor would likely result in a better running car. Otherwise, they'd be better off eliminating it, right?

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