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Injector duty never above 50%

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Old 07-16-12, 02:12 PM
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Injector duty never above 50%

I have a problem with poping from the exhaust after transition, and injector duty cycle is never above 50%.

Running PFC, 550/1300cc injectors, Supra fuel pump, 3" DP, Amemiya sports cat, mild street port, Twin Power, V-mount.

Old 07-16-12, 06:59 PM
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Injector duty isn't going to be over 50% at 5000 rpm. Why only 5K in the video? What happens at high rpm under full boost?
Old 07-17-12, 12:08 AM
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I get a popping sound from the exhaust and don't want to rev higher. Watch the boost needle in the movie, you can see it shake when the popping sound is heard.

Gonna replace spark plugs and ignition cables today.
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