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Join Date: Sep 2013
Location: North Carolina
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OK, my last post on this issue...
Again, the TSB in question has a noise that only lasts about 1/2 second and does not effect in the least the way the car runs. The VVT gear is supposed to rotate to max retard on shut down, and there is a hardened steel pin that engages to lock the gear in that position until the engine starts and the oil pressure unseats the pin and unlocks the gear. If the pin sticks or breaks, the gear then rattles extremely briefly until the system starts to operate. The gears have a special type fastener on them to hold them together and cannot be disassembled. I have done it with a chisel and hammer on one that was no good, but then they are REALLY no good! If the gear is affected by that problem, there is no recourse but to replace it.
Ron AKA is correct, when the OP stated it was misfiring, I read into it that the CEL was on, which is not mentioned. But that got me started thinking some more along the lines I stated. On and ICE, if the fuel has drained down as I suggested, the car just spins and doesn't start. After a few seconds of cranking, the operator generally quits. But on the TCH, the ECU is in control. It will spin the engine for something 20 seconds before it quits and sets a code. In the fuel deprivation I mentioned, the ecu is causing the engine to be spun over, but it is only partially running until the fuel pressure comes up, and then it smooths out.
I would want to hook a laptop to one while it was doing it, or a pressure gauge or both, but IMO that is the only thing that fits the symptom.