Join Date: Dec 2006
Location: Mount Airy, MD
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Ok today I pulled the valve covers. Bank 1 connector had migrated out about 1/16". Bank 2 connector had moved almost 1/4" (that would explain p1272).
I installed the retainer repair kit. Ohm'd out all uvc wires...all .2 ohms. While I was there I turned on the ignition and got 110vdc at the center connector and 1 pin of all injectors. I plugged everything in, cleared codes, ran buzz test. All injectors sounded the same. I still have p1293 and p1294 codes.
Then I tried to start the truck....no start.
Decided to look at the data and noticed ICP was rising to 2300 psi while cranking. So I unplugged the ICP sensor and cranked again pressure reading still rising to 2300psi with the sensor unplugged! The pressure does drop to 0 when not cranking. So most likely a short in the wiring harness somewhere.
I then decided to try and isolate the short so I unscrewed the main harness at the left side valve cover and cranked the truck. Pressure stayed at 0. So most likely I have voltage bleeding in the engine harness somewhere. That's as far as I got today.
My only question today is isn't the computer supposed to default to 700psi ICP when the sensor is unplugged?
Any thoughts or comments are appreciated.