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Mps

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  1. Mps

    Hi I got a question if you have the time I got a 93 400 vmac and I get a timing actuator mechinacal system not operating properly code on my otc hd scanner with a derate only when I pull a hill loaded rest of time it's fine.  Shut key off restart it clears till next hill. Any ideas. Thank you in advance. 

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