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199 Posts
Discussion Starter #1
Ok, I recently had a 351w swapped into my truck, i used a pcm from a 351w c6 truck. my check engine light is now on, I pulled the codes today, and got a 23 and a 31. Looks like like 23 is a bad TPS and 31is something called a EVP circuit. Not sure what the EVP is how do i replace it or repair it? Any help would be greatly appreciated thanks guys
 

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Discussion Starter #2
Broke out the multimeter and tested everything per instructions evp was shot replaced it and everything seems good now no cel so I'm happy
 
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