hi guys can anyone point me in the direction of some usefull info for using the first look sensor with my pico

maybe a book or website article or something to get me going on the right track

basicly i'm looking at using it for checking every day stuff checking for bent valves valve timing engine condition etc

thanks in advance guy.s  :)

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.

This is the Senx site and has all the data you'll need to understand how to use it  [smiley=koolaid2.gif]


http://www.senxtech.com/

great info mick thanks very much and i will give that a go. for sure its my new bible for the next week (if i get a chance that is) i will try and get some captures saved and will try and get my head round it
cant thank you enough  :)

thanks drdiesel i will check that out in the next few miliseconds mate thanks  :)

kennyp wrote on Sep 13^th, 2011 at 11:09am:

i will try and get some captures saved and will try and get my head round it

If you do that and post the waves here and give us your thoughts on what you captured we will discuss them with you. [smiley=koolaid2.gif]

Double [smiley=koolaid2.gif]

Thats what makes the forums interesting for a super car geek like me ;D

thanks guys will do my best  and i appriciate the help

i have a guy training in the next few weeks for doing mot's and a guy off on holiday (seems i never get a min) next week after i get one of my tech's through his mot it will hopefully free up some time for me to play with the pico scope

;D ;D

Checking timing, bent valves, ect...


Wouldn't WPS be better for this?

Darren

Darren Cotton wrote on Sep 13^th, 2011 at 11:17pm:

Checking timing, bent valves, ect... Wouldn't WPS be better for this? Darren

Darren

Maybe Kenny only has FLS and that’s the tools he will use until he can afford the WPS which will give him internal cylinder pressure waves.

He is going to find the FLS will give him cylinder leakage test results under certain conditions that the FLS is used.

Mick wrote on Sep 14^th, 2011 at 6:38am:

Darren Cotton wrote on Sep 13th, 2011 at 11:17pm: Checking timing, bent valves, ect... Wouldn't WPS be better for this? Darren Darren Maybe Kenny only has FLS and that’s the tools he will use until he can afford the WPS which will give him internal cylinder pressure waves. He is going to find the FLS will give him cylinder leakage test results under certain conditions that the FLS is used.

It's the way I had to do it  [smiley=smiley-face-groupwave.gif]

The FLS is a handy tool that's quick and easy to use  [smiley=ok.gif]

i was going to buy the wps sensor and probbably should have but thought i'd start with the fls and if i get the hang of it and it helps me out i will buy the wps def.

possibly i should have thought about it more at the time just checked and the wps sensor is about £240 more than the wps so should have went for that  :-/

gona try and get something logged tomorrrow as i am a bit quieter tommorow  :)

you guys are funny :-/