Question about 1999 Subaru Legacy

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My 99 b4 is not boosting when put foot down but is still driving like a normall car also fuel gauge not working properly

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Hi, first of all, take your car to any auto zone place or mechanic and they can check your computer for trouble codes to see why it isn't accelerating. It sounds to me like something is wrong with your Throttle Position Sensor, it tells the computer how far your pushing down the throttle to allow the proper ammount of fuel to be injected into the engine, it may have a bad spot in the sensor so when you push the throttle down that far, it's malfunctioning and the computer doesn't know to inject more fuel into the engine to accelerate faster. When this sensor fails, it won't accelerate fast enough and then it should normally store a trouble code in the car CPU....

Concerning the fuel gauge not working, it's either you have a float or sender problem which is quite easy to detect and fix. The fuel pump sender are under the back seat of the car. So you can check it out yourself to find the cause of the problem...

Posted on Oct 04, 2010

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Posted on Jan 02, 2017

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This engine had a problem with the ignition coil which resulted in the problem you describe, i.e., missing and rough running under load. I\'ve attached and ad for a replacement coil that also suggests that you clean and re-secure the coil ground and check or replace the Crank Position Sensor. Hope this helps.

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