deltapine1

https://www.cruiseryard.com/80-series-new-oem-seiken-brake-booster-and-oem-gasket/ Seems to be a popular choice here with no negative feedback to date, anecdotally speaking. I've been running it for 1.5-2 years, 20Kish miles, lots of urban...

Gas that is a few weeks old these days is suspect. I buy Non Ethanol 91 Octane and drive it daily. I do not think mine is gas related. I am curious if yours had the White crystalline snow flake deposits?

Singer Sewing Machine smooth - 44k miles. The only reason I changed them was PM. No CEL. No 26 or Lean Codes. 1st image is a close up of what Cylinders 1 thru 4 look like. Powdered Donut crystalline white. 2nd Image is what Cylinders 5 & 6...

Just happened to have a piece of 1/2" thick FRP hand lay up flat stock made from non directional E glass laying around?

I noticed after doing the PHH bypass loop on mine that the area above the BRake Booster (my PHH bypass loops around the Brake Booster was noticeably warmer. I only notice it on cool Fall or Winter days. You cannot feel it in the Summer.