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

trouble code help

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Old Jul 16, 2003 | 04:36 PM
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atotalnincompoop's Avatar
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Default trouble code help

i can't find my manual to read what these codes mean so maybe you can help

1. 4 flashes then 2 flashes
2. 4 flashes then 4 flashes

thanks guys Greg :cheers:
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Old Jul 16, 2003 | 05:11 PM
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Steel Blue 91
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Default Re: trouble code help (atotalnincompoop)

42 = Electronic Spark timing circuit (85 to 91)
44 = Lean exhaust present
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Old Jul 16, 2003 | 05:15 PM
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Default Re: trouble code help (Steel Blue 91)

42 = Electronic Spark timing circuit (85 to 91)
44 = Lean exhaust present
thanks is that all that it says about them?
does it say what to look for?
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Old Jul 16, 2003 | 05:19 PM
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Default Re: trouble code help (atotalnincompoop)

Did you set your timing recently? Make sure you remembered to plug your EST wire back in if you have. If it IS plugged in unplug the ECM 12v plug for 1 minute and plug it back in.
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Old Jul 16, 2003 | 11:11 PM
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Default Re: trouble code help (Steel Blue 91)

42 = Electronic Spark timing circuit (85 to 91)
44 = Lean exhaust present
what would cause a lean exhaust condition?
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