Vehicle came in stolen and recovered, and an engine assessment had to be done using E-scan we where able to conduct a relative compression test from one port after removing the fuel pump fuse in the boot fuse box

This is all well and good when the engine goes well and there is no issues we we decided to conduct a fuel trim test to make sure the engine was running good through the rpm range

After this an Astra engine came in on a tow truck after it just stopped on the road, the engine sounded funny when cranking so again a relative compression test was Carried out

Even though the pc told us this was ok I decided to not believe the pc relative compression test as the graph didnt look quite right, out with a spark plug and we found cyl1 – 0 Psi, Cyl2 – 50 Psi, Cyl3 – 0 Psi Cyl4 – 0 Psi

So it just goes to show you go with your guts and do things manually when your guts tells you something, but I learned the differences in the graphs this Astra direct injection engine, had a snapped chain….

And we will know faster next time. Faster at servicing and repairing vehicles in seven hills NSW