random misfire

2000 CHEVROLET PRIZM
141,459 MILES • 4 CYL • 2WD • AUTOMATIC
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HARTLEYKID
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why do my 2000 chevy prizm keep throwing a random misfire code I put in no spark plugs I also check engine compress it was 155 on all cylinders what can be the problem can you help me thanks
Jan 29, 2011 at 8:53 PM
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STRAILER
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Hey HARTLEYKID,

A random misfire code is usually a mixture problem, have you changed the fuel filter? Also it could be the mass air flow sensor that is dirty. here is a couple of guides to help you get the problem fixed.

https://www.2carpros.com/articles/mass-air-flow-service

and

https://www.2carpros.com/articles/engine-misfires-or-runs-rough

and

https://www.2carpros.com/articles/how-to-change-a-fuel-filter

Run some tests and get back to us so we can continue helping you.

Best, Ken
Feb 2, 2017 at 3:19 AM