LT1-LT4 Modifications 1993-97 Gen II Small Block V8

code 18 on 95 T/A??

Old 12-08-2010, 11:55 PM
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Default code 18 on 95 T/A??

my car keeps running like ****, I just scanned it and its trowing Code 18 (crank signal open) what is related to this code? where should I start looking for problems, PCM, injectors or opti??
Old 12-09-2010, 12:21 AM
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code 18 is Injector circuit(s)
Old 12-09-2010, 08:24 AM
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so should I go towards the injector side?


car has 107k miles, injectors are the origininals, when I have all the injectors plugged its missfires like crazy, when I take off injector #1 it runs better but its obvious that is missing a cylinder
Old 12-09-2010, 11:25 AM
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that'd be a pretty good place to start.


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