2010 Ford Edge 3.5L P0303 Misfire Diagnostic! - The Power Of Relative Compression Testing!

[@sheerwillsurvival2064]

Great video

[@davidlampe4153]

Sounds like wrenching with Kenny change the coils and get the eBay cheap ones change the injectors and get the eBay cheap ones. I’m convinced that they are their own worst enemy. Buy the OEM stuff you’ll spend the money once and it won’t bite your ass later. Dang it one minute into the video I already know where this is going!

[@TheHortond]

Did you run an old fashion compression test? If not. Why?

[@BigDogDiagnostics]

No I did not. Because it would have been redundant. Just not necessary at this point. The client isn’t interested in any major repairs at this time. I may film a part 2 if they decide they want me to further pinpoint the issue. But a traditional compression test is becoming a thing of the past. There are more effective ways to see what’s going on in that engine.

[@geoepi321975]

What about a single cylinder?

[@BigDogDiagnostics]

What is the question? Sorry not following.

[@geoepi321975]

@@BigDogDiagnostics sorry i mean how can I test the integrity of a single cylinder scooter if it's mechanical and timing good perhaps with a vacuum gauge ?

[@BigDogDiagnostics]

@@geoepi321975 you can either use a mechanical gauge to get the compression and you can also perform a leak down test if you have that tool. Scope wise the best way to test for mechanical integrity would be to use an in-cylinder pressure transducer.

[@BigDogDiagnostics]

@@geoepi321975 but if you don’t have another cylinder to compare an RC test too it doesn’t matter.

[@oldbiker9739]

real oem parts are expensive but well worth it.

[@BigDogDiagnostics]

Definitely! Parts are a crapshoot these days unfortunately. I am using more and more OE parts these days. I didn't used to see such a high aftermarket parts failure ratio. Nothing worse than chasing bad new part issues!