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The problem that was seen on two cars on this forum last fall was injector duty cycle hitting 98+ percent both stock cars. Cat over temp kicked in causing the computer to dump more fuel. Fuel pressure went down and the stock fueling in the car just couldn't keep up. DA was around 0 the day @vortecd logged this on his car. @moparjim was the other and he put a tune on his car adding no timing but fixed the Cat over temp issue and picked up a couple tenths.
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