2002 sunfire with eco-tech engine P0300 code

[Larry W]

Is car smart enough to give P0301 P0302 P0303 P0304 codes for specific
cylinders?

I am spinning my wheels trying to trouble shoot P0300. Replaced plugs.
Suspect ICM but that is pricey. Might be injectors also. Any help
would be appreciated.

TIA,

Larry

[Geoff Welsh]

Post by Larry W
Is car smart enough to give P0301 P0302 P0303 P0304 codes for specific
cylinders?
I am spinning my wheels trying to trouble shoot P0300.  Replaced plugs.
Suspect ICM but that is pricey.  Might be injectors also.  Any help
would be appreciated.
TIA,
Larry

free info from the OE

<https://service.gm.com/gmspo/mode6/2002eparms.html>

Many GM of the era will set P0300, and you use the scan tool to watch
the misfire data to SEE which cylinder it is. If you don't have the
proper tools to diagnose, take it to someone who does. It could just as
easily be low fuel pressure as anything else. Simple to diag with
proper equipment.