Dudes, my eBay compression tester arrived today
Weird thing is, the instructions say to warm engine, then remove ALL spark plugs, labelling as you go.
Is this right? I understand that you are only testing one cylinder at a time however don't you need all the plugs seated to ensure a true reading?
It also said to remove the intake snorkel. I would like the car to inhale as much air as possible however I'm not real keen on having WOT and no air filter...
Any pointers would be great please!