Changed my spark plugs today and did a compression test while I was there. First time to do one, but I think the results are OK. Anybody want to share their opinions?

 

Back

 

155 165

160 150

150 145

 

Front

 

Previous plugs were in a pretty healthy state so that's always promising :)

Yes mate thats ok!

 

Don't you just hate the way he asks this after doing a 12.6 second quarter at the Pod :D

Hmmm minimum is 142psi, max difference 14psi. You passed on the minimum reading but looking at your max/min there's a 20psi difference. This can be caused by the battery voltage dropping between tests though. Best way is always to have all plugs removed and another car to jump start with. This way there's less load on the starter with the plugs out and also the battery voltage stays consistent throughout the test :)