View Single Post
  #10  
Old 4th February 2018, 15:20
Mitchelkitman Mitchelkitman is offline
Senior Member
 
Join Date: Oct 2013
Location: norfolk
Posts: 691
Mitchelkitman is on a distinguished road
Default

My money (or yours?) is on it being an earthing problem - with the spark 2&3 being 'commonised' and 1&4 similarly - a weak spark for #1 that looks ok when it's visible, but not enough oomph under pressure!
Reply With Quote