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I have just put a ls2 eng in a ls1 car and have had all the necessary computer work done to the ecm but my problem is i had to use the cable driven throttle body from the ls1 cause ls1 ecm wont except the electronic fuel pedal so that brings me to the problem of vaccum routing,Can anybody help with this? It is hard to start and it quits. I cant seem to find the sweet spot with the vaccuming
 
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