Hi islandcat. Did you ever find out what was causing your vaccum leak years ago? I have the same mods and vmp says i have a vaccum leak as i get a P0171 error. No check engine light but code registers. I am trying a new pcv valve but was wondering if its the O2 sensors like you mentioned. You can email me at [email protected]
Thanks for your time
Travis
Thanks for your time
Travis