It is an 8lb spring. I had hit 7lbs a couple times and then a melted a vacuum line which has since been replaced. I was having the same troubles and gapped the plugs to .032 and then that is when I got 7. I just rechecked them today to make sure to no prevail. I am going to have to do a boost leak check this weekend because the exhaust is sealed up tight(already checked). Whenever I get into the throttle it seems like the wastegate is fluttering so to speak at about 4-5lbs. Once again I can't see under the hood when I am driving so a boost leak check would give me much more detail. Thanks for the response.