C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Injector control

Old Jul 19, 2007 | 08:46 AM
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Default Injector control

Does the PCM control the right and left side injectors independantly or all them together???? I always figured the PCM sent the same values to all eight injectors. Looking at my scanner (new Actron 9190) it shows right and left values for the fuel trims.

Car=1994 Lt1 auto
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Old Jul 19, 2007 | 09:25 AM
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If you have a true 94, you got sequential fuel injection, meaning, every injector is pulsed separately, one after the other.
Previous engines had bank injection, one bank at a time.
The fuel trim left and right got to do, with the O2 Sensors being monitored on each side. L98 engines had a single O2 sensor only.

Last edited by woodstock; Jul 19, 2007 at 09:32 AM.
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Old Jul 19, 2007 | 09:35 AM
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Above 3K rpm, they all operate in batch fire mode.
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Old Jul 19, 2007 | 08:25 PM
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Does the PCM pulse each injector the same amount??? Does it pulse the right bank one amount and the left side the same or a different amount?
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Old Jul 20, 2007 | 09:19 AM
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The pulse is the same.
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