Kia scope vs pico

Ask for and share advice on using the PicoScope kit to fix vehicles here.

Kia scope vs pico

Postby GRUSS » Fri Apr 27, 2012 8:32 pm

I've been on a diagnostic course for Kia over the past couple of days through work. Today we where in the workshop diagnosing various staged faults on various Kia vehicles.
One scenario was on a petrol cee'd with a blocked fuel injector filter. It was misfiring with a cylinder 3 DTC. STFT was 5% and O2 sensor was reading lean. First we scoped the injector to see if the ECU had turned it off due to a faulty coil. Injector waveform looked ok apart from a slightly increased 'on' time due to the 'lean' condition.
Then I scoped the number 3 COP ( 2 wire) this is the first proper time I've had chance to look at ignition. The waveform looked ok. This is where things got interesting and I had a few questions for the instructor...

First off, there's no zoom feature! So the detail was severely lacking.Only one set of measuring rulers. Placed a trigger on the waveform to stabilise it. Switched on another channel and scoped number 1 (known good) but couldn't have 2 triggers at once and couldn't scroll across to see number 1. Had to compare number 1 and number 3 separately!! On the tiny Toughbook screen they looked the 'same', the instructor came over and asked about our findings. On very close inspection of the number 3 waveform you could see that the burn time was different and the pattern didn't look the same. This was down to the partially blocked filter.
I asked him about the scope and it's lacking features. He then started talking about dedicated old Skool sun crypto tuning scopes :lol:

Purely down to my lacking knowledge about ignition waveforms, if I was using this Kia scope at work I would have totally missed this. All of the other lads agreed! I think with the pico I could of zoomed in and compared number 1 and 3 on screen and spotted the problem.

Either way, it was interesting but the pico would have blown this out of the water! It doesnt even come with a current clamp! :shock:

Glad I bought the pico! :D
GRUSS
Guru
Guru
 
Posts: 119
Joined: Tue Dec 27, 2011 11:16 pm

Re: Kia scope vs pico

Postby Robski » Fri Apr 27, 2012 9:11 pm

Russ

How do you mean " 2 triggers at once " ?

Could you not have adjusted the time base to see the other event you were after ?
User avatar
Robski
Advanced User
Advanced User
 
Posts: 602
Joined: Tue Sep 14, 2010 6:36 pm
Location: Yorkshire

Re: Kia scope vs pico

Postby GRUSS » Fri Apr 27, 2012 9:28 pm

Robski wrote:Russ

How do you mean " 2 triggers at once " ?

Could you not have adjusted the time base to see the other event you were after ?



I set a trigger on channel 1 to stabilise the number 3 ign. Waveform. My next plan was to set a second trigger on channel 2 on the number 1. But I couldn't do this... Infact can you do this with the pico? I thought each channel had there own trigger?
Anyway, I then adjusted the time base to try and get them both on the screen but it just wouldn't fit. There was no 'record' function either so I couldn't stop it and scroll across either.
It was limited :x
GRUSS
Guru
Guru
 
Posts: 119
Joined: Tue Dec 27, 2011 11:16 pm

Re: Kia scope vs pico

Postby Robski » Fri Apr 27, 2012 9:48 pm

1 trigger.......1 channel ( selectable on pico )

The Kia scope sounds pants, but surely by adjusting the time base you could have seen the 2 waveforms on 1 screen ?

What were the time bases you could select ?
User avatar
Robski
Advanced User
Advanced User
 
Posts: 602
Joined: Tue Sep 14, 2010 6:36 pm
Location: Yorkshire

Re: Kia scope vs pico

Postby GRUSS » Fri Apr 27, 2012 10:04 pm

Robski wrote:1 trigger.......1 channel ( selectable on pico )

The Kia scope sounds pants, but surely by adjusting the time base you could have seen the 2 waveforms on 1 screen ?

What were the time bases you could select ?


Thinking back, I should of been able to get them both on the screen. I didn't really observe the actual time base, I was just clicking the arrow to try and get the 2 waveforms. It was still years behind the pico though I regards to zooming in to check the detail.

I've just watched Paul's latest video on his YouTube channel (scannerdanner) ford COP ign testing and you can see the POWER of the pico in action! Mind you it's got a excellent driver :wink:
GRUSS
Guru
Guru
 
Posts: 119
Joined: Tue Dec 27, 2011 11:16 pm

Re: Kia scope vs pico

Postby ScannerDanner » Sat Apr 28, 2012 6:00 am

GRUSS wrote:
Robski wrote:1 trigger.......1 channel ( selectable on pico )

The Kia scope sounds pants, but surely by adjusting the time base you could have seen the 2 waveforms on 1 screen ?

What were the time bases you could select ?


Thinking back, I should of been able to get them both on the screen. I didn't really observe the actual time base, I was just clicking the arrow to try and get the 2 waveforms. It was still years behind the pico though I regards to zooming in to check the detail.

I've just watched Paul's latest video on his YouTube channel (scannerdanner) ford COP ign testing and you can see the POWER of the pico in action! Mind you it's got a excellent driver :wink:

Thanks for the plug Russ!
ScannerDanner
User
User
 
Posts: 43
Joined: Thu Feb 23, 2012 4:28 pm

Re: Kia scope vs pico

Postby Dave Hill » Sat Apr 28, 2012 9:24 pm

Hi Gruss

Don't beat yourself up over your question. It won't be long before you understand things more fully.

I can say this without feeling smug, as I can remember asking a similar question when I started out on my Pico voyage.

Looking back, I feel rather embarrassed. But in reality it demonstrates that we all have to start somewhere.

http://www.autonerdz.com/cgi/yabb2/YaBB.pl?num=1169500568/0#0

Enjoy the ride Gruss!
Dave Hill
Advanced User
Advanced User
 
Posts: 52
Joined: Fri Jun 22, 2007 8:15 am

Re: Kia scope vs pico

Postby GRUSS » Sun Apr 29, 2012 5:59 pm

Dave Hill wrote:Hi Gruss

Don't beat yourself up over your question. It won't be long before you understand things more fully.

I can say this without feeling smug, as I can remember asking a similar question when I started out on my Pico voyage.

Looking back, I feel rather embarrassed. But in reality it demonstrates that we all have to start somewhere.

http://www.autonerdz.com/cgi/yabb2/YaBB.pl?num=1169500568/0#0

Enjoy the ride Gruss!


Thanks for the comment dave :) i've learnt more in the past 6 months than i have in the past 3 years! getting to grips with a scope is a challenge and understanding the actual waveforms is a different animal, but i'm slowly getting there.
I know i've said this before but working in a main dealer all my career has certainly blind sided me. Its down to me now to actully try and learn!
GRUSS
Guru
Guru
 
Posts: 119
Joined: Tue Dec 27, 2011 11:16 pm


Return to Diagnostic discussion

Who is online

Users browsing this forum: No registered users and 1 guest