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Plugged exhaust ? please look at log
Recently built 5.3 swap in a 07 sierra Gen3 DBW with TSP stage 1 cam and valve springs. trying to figure out why it has absolutely no power and wont even break the tires loose. TM removed and runs the same, back to stock even worse. I noticed that my KPA readings go to 100KPA under heavy load which I dont think is normal for a NA motor. Thought maybe a cam tooth off but thats good. Now wondering about if the exhaust possibly plugged or restricted. blew the tires off it when it the 4.8 in it with the same exhaust hard to believe an extra.5 liter slowing it down. Running out of ideas any help would be very appreciated.