kennyp wrote on Sep 12
th, 2011 at 3:15pm:
basicly i'm looking at using it for checking every day stuff checking for bent valves valve timing engine condition etc
Kenny
The best place for you to learn is right in your bay on a perfectly running engine.
I will tell you what I did.
Put the best sample rate on scope with plenty of time no less that 500ms/div.
Put plus/minus 10Volts on one channel and connect the fls to that channel
Now gently suck the FLS and watch the direction the wave takes and then gently blow.
Now you know what to expect when you attach it to the vehicle.
The first test to do would be to stick the sensor hose into the exhaust of and 4 cylinder engine and crank the engine no start and collect a wave and save it in a folder.
Now connect a sync to cylinder 1 and do the same test.
Now start the engine up and disconnect an injector go to the exhaust tail pipe and get a sheet of paper and hang it over the outlet until it gets sucked in and out.
Now take these 3 captures and use what you know about valve over lap and see if you can work it out.
You are starting on a 4 cylinder engine because there is a delay from the sync to the pulse of the FLS.
You will see the delay on the misfire capture.
The fls delays because of the length and design of the exhaust pipe.
Don’t do any V engines until you are comfortable with 4 cylinders.
Do the same on the intake.
Do you think you will see the misfire?
If you have an old 4 cylinder in the back of the lot that is going out to the scrap then it would be a good candidate for you to remove the rocker cover and tighten and loosen valves and capture waves.
You have to do this for yourself because no 2 engines are the same when it comes to analysing these waves,
Don’t get discouraged because there are a few good tests that will work every time for you as you get use to the sensor.
Good look on your quest.
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