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Yes I was driving my 2003 C70 with the B5234t motor and it was running fine then i left a red lght and just ike that the check engine light came on and it was running very poorly. So I pulled it into a advance auto and they hooked it up to a reader and said I had missfire on number 4 cylinderso I bought a new coil and installed it this did not cure the issue so anouther advance closer to my home plugged into it and said I had missfire on one and two as well so at this point I bough the other 4 coils and a new set of plugs and I installed them alltho I can tell it is running better(it needed a tune up before this happened) it still has this issue and runs like it is missing a cylinder. When they had it hooked up they mentioned something about a injector any ideas?
 

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check valves

sounds like mine, which was a burned out exhaust valve, check that possibility before you spend hundreds on other stuff
 
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