Code PO200, sounds like a 4 cylinder....

camaroz28lt1at · 11-03-2009, 09:53 PM

So i just got my heads, intake, fuel injectors, etc..... Go to fire it up and it sounds like its gonna fall apart!! Did some checking and I got code 200, Injector Circuit Malfunction. Checked for 12v at all injector plugs and only half have power. So new PCM time?

Info on vehicle, 95 Camaro with LS swap ran by 2002 computer with Speartech modified harness.

jeff2380 · 11-03-2009, 11:45 PM

I would suggest checking the wiring of the harness with a DMM, comparing it to the PCM pinouts. Was the harness for a 2002 computer?

did you adjust the flow rate of the new injectors in the tune?

camaroz28lt1at · 11-03-2009, 11:52 PM

DMM? Yes, the computer is for a 2002 harness. The computer hasn't been adjusted for the injectors. Would a tune cause the injectors not to get power??

camaroz28lt1at · 11-04-2009, 12:41 AM

Update: I checked all the wires using the power probe and all wires are good on driver side bank to ECM connection.

I wasnt paying attention and one of the coil packs were disconnected so I wasnt getting the right readings at first on the "power" wires.

jeff2380 · 11-04-2009, 02:58 PM

DMM = Digital Multimeter, same purpose as a probe but doesn't draw power for the light. Not that it would matter for checking for power at the injectors.

The injector size in the tune MUST match the size of injector installed in the car. Other wise the fueling is going to be way off. If you upgraded the injectors to bigger ones, the car will be way to rich, maybe to the point it won't start.

camaroz28lt1at · 11-06-2009, 09:59 AM

There was a miscommunication with the year of the car so one of the wires in the c100 plug was in the wrong place, problem fixed!!!!