I recently changed my engine because my 599 block had cracked starter mount. Bought the truck and I didn't know the guy welded a stud in for the starter. Anyhow put in a supposedly low hour hummer 6.5 engine. Installed new cable for relocation kit. But the engine cranks a long time before it starts. I set my wastegate 5-6lbs with a pull scale. When it does start it runs smooth but ya pull out and it will stall out and won't start again. New PMD already lift pump comes on with key but the computer wont talk to my otc genisis scan. Keeps saying no data. Also seems to have excessive blow by. I did have it running in the garage for about 4 hrs hoping the blowby would settle.