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- - check engine (https://volvoforums.com/forum/volvo-s40-11/check-engine-58041/)

fastfive

10-08-2011 07:30 PM

check engine

my check engine light came on and had it looked at and they said it was 301 and 304 cylinders what could that mean

JondevieonS40

10-09-2011 04:55 AM

There's a air leak between those cylinders maybe? Might need to replace a gasket or something

Hudini

10-09-2011 08:56 PM

Cylinder #1 misfire and cylinder #4 misfire. Sounds like you need new spark plugs and coil packs (and maybe wires). What year car and engine?

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