89 Chevy Camaro code 43

1989 CHEVROLET CAMARO
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TIMW725
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My Service Engine light has came on. when i pull a code i get 43. I have a Haynes manual and it says the code is Electronic Spark Control. I have Replace the knock sensor and the ESC Module. Reset the EMC after each replacement but i still get this code. What else could be my issue? anyhelp? please?

Also 97,000 miles auto transmission V8 305 TBI
Jun 27, 2007 at 5:01 AM
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E40WATER12
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Has youre car had a full tune, Spark plugs wires?.
Jul 3, 2007 at 5:34 AM
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TIMW725
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yes it has. I just went to my local autoparts store and they have told me that code is TPS. could this be true?
Jul 4, 2007 at 4:25 PM
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TIMW725
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hello. anyhelp
Jul 12, 2007 at 4:04 AM