The short story is ... haha
Read these links for the long history on this problem and what I tried to solve the problem:
https://www.svtperformance.com/threads/bad-rear-o2-sensors-misfire-code.1159876/#post-15912004
https://www.svtperformance.com/threads/need-help.1166648/#post-16047599
The crank balancer bolt was loose. Seems like an obvious thing to check in hindsight, but you had to be there . The stock balancer is back on the car. I had an ATI +10% on it before. The loose bolt caused the balancer to scuff the crank trigger wheel. I didn't see it in person, but I do have pictures of the ATI balancer, see below.
Why did the bolt back out??? Seems odd to me. I have read of similar problems with aftermarket balancer installs. I can't remember the user's name exactly, but I think it was Lexus something. His post is what tipped me off on checking the balancer.
Steve
Read these links for the long history on this problem and what I tried to solve the problem:
https://www.svtperformance.com/threads/bad-rear-o2-sensors-misfire-code.1159876/#post-15912004
https://www.svtperformance.com/threads/need-help.1166648/#post-16047599
The crank balancer bolt was loose. Seems like an obvious thing to check in hindsight, but you had to be there . The stock balancer is back on the car. I had an ATI +10% on it before. The loose bolt caused the balancer to scuff the crank trigger wheel. I didn't see it in person, but I do have pictures of the ATI balancer, see below.
Why did the bolt back out??? Seems odd to me. I have read of similar problems with aftermarket balancer installs. I can't remember the user's name exactly, but I think it was Lexus something. His post is what tipped me off on checking the balancer.
Steve