Re: Need mechanics advice, and maybe a lawyer...
It would be possible for someone to remove the hose from the throttle body, pop a small bolt, nut whatever in there and it would take some time to get to the combustion chamber, it would have to be small enough to pass through the valve.
ONE possibility,,, if the throttle plate butterfly screw came off it could explain how the blot got in there, Get a hold of the throttle body and check the bolts, if one is missing,, bingo,, OR, if one looks new and the other old,, they may have caught it and replaced it to avoid buying the motor.
Tom
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