engine rebuilt last summer
I had my engine rebuilt and weaker than before. the mechanic says its running lean on the dyno 13.5-15 WOT. I had my pcm programmed by Bryan Herter before and checked afterwards. Bryan says it a vacuum leak. I looked all over this engine and cant find nothing yet.I did not get a chance to try any of your response yet.I'm waiting on my service manual to come this week.