P0200

[jamesp]

I HAVE A 2002 YUKON DENALI WHICH I HAVE REPLACED, FUEL PUMP, FUEL PRESSURE REGULATOR, SPARK PLUGS, WIRES, ALL 8 INJECTORS TWICE (1ST SET THE OHM'S WERE ALL OVER THE PLACE) VALVE COVER GASKETS, INTAKE GASKETS, KNOCK SENSORS, THROTTLE BODY GASKET AND ALL THE INTAKE BOLTS. I AM STILL GETTING THE P0200 CODE PENDING AND IT HAS LACK OF POWER AT FIRST AND ALSO A ROUGH IDLE THERE IS NO OTHER CODE SET OR PENDING. I HAVE CHECKED THE WIRING WITH A NOID LIGHT AND THEY ARE ALL PULSING. HAS ANYONE ELSE HAD THIS ISSUE?

 

[Mudsport96]

So no misfire codes to guide you on which injectors might be the problem? That is a tough one.

 

[jamesp]

nope not prior or now.....when i suspected the injectors i pulled the whole rail and tested each injector and the ohm's were all over the place so i ordered a new set and tested them before i installed them and they were all good and still have the same issue

 

[Fless]

Misfire codes or not -- get a scanner on it that can read live data, especially single cylinder misfire counts, and see if one sticks out.

 

[jamesp]

i had 4 broken wires under the fuse box, had to been mice