Search found 517 matches

by Technician
Wed Aug 14, 2019 8:23 pm
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 715

Re: Secondary Ignition scope analysis

It is well documented around the globe that testing anything looking for errors is best achieved by loading and stressing that subject to force the error. For secondary ignition that is not going to be achieved at Idle, 1500 rpm or 2500 rpm. Cannot be achieved at any RPM really. If you don't know h...
by Technician
Wed Aug 14, 2019 8:34 am
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 715

Re: Secondary Ignition scope analysis

Waste spark system is best checked at idle since you have the advantage to see a spark under no compression. Really ?? Then why don't we check spark with the spark plug removed ? In atmosphere !! I have always seen compression lower at higher Rpm then at idle too. Something not adding up here ! Ive...
by Technician
Tue Aug 13, 2019 12:17 pm
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 715

Re: Secondary Ignition scope analysis

Hi technician, I'm looking at your first post (screen 7) you are running at around 800rpm.Your cyl.4 shows some odd behavior which is a characteristics of pico's secondary leads. The data is not valid anymore when you see those jumps. There are 10000:1 leads available which are a lot better, but do...
by Technician
Tue Aug 13, 2019 12:13 pm
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 715

Re: Secondary Ignition scope analysis

The aftermarket telling me that silver calcium batteries were not required. Auto-electricians telling me that they had repaired faults in the alternator and that it was now working fine, only to find that later the battery still discharged. I fitted an OEM alternator from Ford myself, and a silver ...
by Technician
Mon Aug 12, 2019 8:39 pm
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 715

Re: Secondary Ignition scope analysis

I've done some more ignition scope tests this evening. They look a lot better and I think the main problem is how I'm setting up the scope and whether the leads connected to the plug leads are very sensitive and allowing interference? I decided to pass the leads through the bonnet hook and let them ...
by Technician
Sun Aug 11, 2019 7:45 pm
Forum: PicoDiagnostics NVH
Topic: NVH Road Test
Replies: 12
Views: 648

Re: NVH Road Test

Thanks Steve for your feedback. Interesting that you mention the pc. I seem to be having no end of problems with pc's at this time. I can now confirm that the USB lead and sockets are not the problem. Today I copied the NVH file from the hp laptop to the Sony laptop I have after downloading the late...
by Technician
Sat Aug 10, 2019 12:40 pm
Forum: Diagnostic discussion
Topic: TOP ISSUE...
Replies: 14
Views: 791

Re: TOP ISSUE...

Hi, do the test again but increase the settings for the current on channel B. It looks like the settings at about 0.7 A are too low.
by Technician
Fri Aug 09, 2019 7:10 pm
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 715

Re: Secondary Ignition scope analysis

Not sure how or why the bits settings between the two scope traces above are between 12 and 16 bits, and the offset at a value of 1.0. In the channel A I only selected wasted spark positive and changed no other settings. I can see now what Iver is saying about the negative voltages. These negative v...
by Technician
Fri Aug 09, 2019 12:10 pm
Forum: PicoDiagnostics NVH
Topic: NVH Road Test
Replies: 12
Views: 648

Re: NVH Road Test

Thanks Steve for your feedback. Given that we have already been down the road of sending the scope back previously for noise issues and I'm still having problems with connectivity, which I don't think you would have been aware of back then, because the help line suggested my problems could have been...
by Technician
Thu Aug 08, 2019 10:02 pm
Forum: Help me fix my car
Topic: 2013 seat 2.0 CR extended crank from cold.
Replies: 5
Views: 243

Re: 2013 seat 2.0 CR extended crank from cold.

Have you used the scope to check voltage against pressure?