Really enjoy this video loved the trick taking the spark plug out to find what cylinders bad then find the firing order brilliant stuff Steve your awesome
I don't even look now mate, petty trolls that haven't got the courtesy to comment why they didn't like or who they are so their opinion isn't valid in my mind.
Yes, and the intake,it's good practice where possible but as a first look then not as important, what you're looking for are anomalies that line up with a compression event.
Great video content and excellent explanations. Please excuse my ignorance, but what injection system does that vehicle have? Is it single, or multi point injection? Thank you.
Not entirely sure what we learned here. The cranking relative compression test indicated faults. But what did the pulse diagnostics tell us. Leak down would have isolated faults so quickly. I just can't understand pulse diags. Other than a lack of symmetry indicating a fault. How does anybody isolate what's wrong?
Great info and very informative steve , always taking huge knowledge of your video , question please I have noticed that your laptop on charge would that interfare any noise to your waveform ? I mean you have a charge turn on . Thanks
@@SimplyDiagnostics looking forward to that one , I believe it’s my area of development, hopefully when ride along with you back on track soon , will be heading over
That was a simple video yet amazing Steve your awesome! 👍 would you consider coming out to me and teaching me how to use my sealey 4 channel scope maybe video it to show your other followers? Thanks dave
I like it for the touch screen optimisation, combined with the 4425a it's makes a powerful package and the UI is intuitive. Once it becomes fully functional and out of the beta it will be awesome 👍
I don't understand the "3X the battery rating" for starter draw specs. If you put a bigger battery in, are you saying the starter amp draw would increase?
No, the system is designed with a specific battery capacity. If the specified battery is fitted and it is in good condition we should see 3 - 3.5 X the Ah rating of the battery as an average current draw on extended cranking. There is more we can check re starter current draw and battery but we use this as a rule of thumb for most cases. There are exceptions and variables.
Also if we think about it, the current draw is directly related to starter and cabling resistance and battery voltage under cranking. Ideally you would measure battery voltage as well but I was keeping it at a very baseline level for testing. Great question ⭐
The ignition pickup you used was capacitive not inductive. And yeah they're about useless for grabbing a cranking sync on waste spark engines. An inductive RPM pickup will give a good sync on waste spark. Taller, and slightly fatter, pulse on the compression stroke so it's easy to trigger on, which really helps on 'scopes with a small buffer. I use one that came with a MAC automotive DMM.
Matt, can you explain the difference a little and to identify the type of clamp you are using. I use something similar to what Steve is using, but thought it was inductive. Love to understand the difference better and how to identify
The Pico one I used was capacitive whereas if you see the photo I put in SimplyDiag YT Facebook group of the Escope, the trace is much more definedthat uses an inductive clamp.
@@alexmessina3383 I get capacitive and inductive backwards myself sometimes. It's easier to think of them in terms of (capacitive) ignition pickups, which'll give a detailed capture of ignition events, and (inductive) RPM pickups which just give a simple pulse. The pic Steve posted on FB is a good example of what the pulse looks like on a waste spark system. A capacitive ignition pickup usually has bare metal jaws that clamp around the plug wire and a ground clamp. The type that are supplied in automotive labscope kits. Inductive RPM pickups are typically all plastic with no ground clamp. If you search for "Fluke RPM80" and "Aeswave Trigger Pickup" that'll give you an idea what they're like.
We're keeping it simple for this series, there's lots of tests we could do but I'm aiming to encourage technicians to take their first steps into non intrusive testing with any scope 👍
