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98 impreza bucking, shuddering, backfiring
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Old 26 Feb 2014, 02:57 AM   #1 (permalink)
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Exclamation 98 impreza bucking, shuddering, backfiring

98 Impreza L AWD Manual 205,000 miles

When I try to accelerate or gently let up on the throttle in about every gear at about 2100 rpms the car gose crazy, it starts bucking, lurching, even backfiring, and very little power. When I get back on throttle hard same thing but not as bad untill it brings the rmps up between 2500 rpms and 3000 rpms after that it would start doing it agian.Seems to be ok when cold/first trip of the day. It trough a P0301 & P0302 and turned the check engine light on so I checked the plugs and wires, regapped the plugs and reset the check engine light but no change. The light hasnt come back on again so im not sure what to do. Hear it could be coil but it seems unlikely and for it not to turn the check engine light back on seems odd.

Help please!!!!!
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Old 26 Feb 2014, 09:41 AM   #2 (permalink)
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Re: 98 impreza bucking, shuddering, backfiring

if you are sure it isnt miss firing try cleaning the evap purge valve,

A maf clean wont hurt
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Old 26 Feb 2014, 01:40 PM   #3 (permalink)
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Re: 98 impreza bucking, shuddering, backfiring

Where it's the evap valve located at and what is a maf clean. I just bought this car not real familiar with it yet.
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Old 28 Feb 2014, 09:46 PM   #4 (permalink)
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Re: 98 impreza bucking, shuddering, backfiring

Quote:
Originally Posted by SubaruSamm View Post
what is a maf clean.
He means clean the Mass Air Flow sensor, if you do use a spray can of electrical cleaner then wait until it is bone dry before re-installing it and starting the engine as you can damage the MAF if its wet.
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Old 28 Feb 2014, 11:19 PM   #5 (permalink)
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Re: 98 impreza bucking, shuddering, backfiring

Thanks I figured that out and it is good so idk
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