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Message: [QUOTE="TARM, post: 1037701, member: 578"] No codes and it stumbles under heavy throttle. With the engine fully warm, now with the new CPS, run a cylinder contribution test. If that checks out. Maybe to be sure on the elecrical side pull the idm connector and ohm out all the connections to the injectors as that confirms the complete circuit for each. I would look at the fuel side. You could log the icp psi/ipr % and volt but if it is the fuel and its dropping enough to stumble it could also allow galling of the barrel and plungers thus ruining the injectors. Given that I think I would confirm fuel pressure first, or at the same time, so as to not do more possible damage. [/QUOTE]

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