Discovery 3 2.7 TDV6 misfire - no compression on one cylinder...but why??

JAS Land Rovers here again with another Picoscope related video...here we diagnose a Discovery 3 with no compression on one cylinder...but which cylinder...and why?!

[@gmak1n785]

Another great video, I work as a technical manager at a retailer and it is fantastic to see such a highly skilled independent garage working with the Land Rover product. Keep up the good work !

[@joehodgy]

Thanks Glenn!!
You guys like to keep us busy...long may it continue! hehe

[@gndichu]

Thank you for sharing this great video and I am super impressed with the way you were able to do a compression test using just a diagnostic machine

[@harrywilson4311]

Great video, fantastic diagnostics for a first time fix. Keep them coming👍

[@joehodgy]

Thanks for the feedback! Great to hear 😊

[@DavidJohnson-kk5jw]

Where did you clamp the amp clamp to get your reading? We've done a few relative compression tests but unable to get on any of the main battery upper engine bay wiring on the 2.7 we've got in?

[@shaunsautorepairs5410]

Thats awesome..ive just found your channel and subscribed...
I just wanted to know could you do this without taking the body off.

[@joehodgy]

Heya - yes the heads can be removed without taking the body off...but...body off makes *everything* easier...and easier to get right :)

[@VaderWhoop]

The fact a small broken valve spring requires all the time, equipment and expense to remove the body to get at the head; is horrific!
An otherwise simple job on many other vehicles, is a heavy equipment time labour intensive task on a land rover, costing thousands rather than hundreds.
It's easy to see why people sell non runners for next to nothing.

[@COM70]

I’m really happy to have found this channel as I have been really really frustrated with both main dealer service as well as specialist “engine diagnostics” garages in the past. They have ended up costing me thousands of euro and actually caused extra damage to my vehicles. I carry out all my own mechanical work and am very interested in learning about automotive electronics. I used to be a sound engineer and so I’m somewhat familiar with digital electronics and I was wondering if you could advise me if (www.picotech.com/oscilloscope/2000/picoscope-2000-overview) this might be a good starter scope and if so what is a good working band with to order it in(options are selectable on the page) thanks a mill if you get time to answer this, don’t worry if you don’t.

[@joehodgy]

Hey Cathal and thanks for the comment! We use the four channel version of this scope - www.picoauto.com/products//automotive-oscilloscope-kit/overview - I'm not sure how the 2000 compares but I'm sure you'll work it out :)