When the GM pickups went to throttle body injection in 1987, I sold parts back then, I started seeing caps/rotors with weird crap like that, whenever the engines got to around 50,000 miles. They changed the design of the cap, new design had vents........
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1977 Black Trans Am 180 HP Auto, essentially base model T/A.
I'm the original owner, purchased May 7, 1977.
Shut it off
Shut it off
Buddy, I just shut your Prius down...
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