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

Code 21 TPS question

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Old 05-15-2006, 08:56 AM
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Default Code 21 TPS question

Need more input on this. The code pops up during wot then goes away. It may explain why my wot performance is horrible. wot feels like p/t, cant even brake the tires now. What else does this sensor effect because the tranny seems to start acting wierd when it happens. How do the two corespond to each other? I'm guessing the tranny uses the tps to know when it's in wot correct? If there was a problem with the tps why doesnt the light stay on, why does it pop up and go away?




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