Search found 517 matches

by Technician
Thu Aug 08, 2019 9:46 pm
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 685

Re: Secondary Ignition scope analysis

I've not had the free time to look into those tests you advise, however I was advised to look at the secondary ignition waveforms again but this time looking at one cylinder at a time. Interestingly the scope trace on all four cylinders now looks normal. However I did recognize that the induced volt...
by Technician
Wed Aug 07, 2019 4:44 pm
Forum: PicoDiagnostics NVH
Topic: NVH Road Test
Replies: 12
Views: 624

Re: NVH Road Test

Just an update on this thread. I have found quite by accident that the software will only run in reverse. I've tried to look at the signal generator that appears to be used for sound but is grayed out so I can't select that option. The picoscope diagnostics error appears when I try to play the sound...
by Technician
Wed Aug 07, 2019 9:42 am
Forum: PicoDiagnostics NVH
Topic: NVH Road Test
Replies: 12
Views: 624

Re: NVH Road Test

Wednesday 7th August 2019 NVH road test. Using a calculated final drive ratio of 1.10.pddata I've spoken to the technical help line this morning and agreed that another road test should be completed because the final drive ratio must not be 0.00. The calculated value I worked out did work and allow...
by Technician
Tue Aug 06, 2019 11:40 pm
Forum: PicoDiagnostics NVH
Topic: NVH Road Test
Replies: 12
Views: 624

Re: NVH Road Test

Hello Steve, So I've still got problems. Reading your post above and taking on board what you advise, I deleted the differential ratio calculation and left that part reading 0.00. I used just the gear ratios and the tyre sizes, however, this has not worked at all, the graph produced from the NVH kit...
by Technician
Tue Aug 06, 2019 6:39 pm
Forum: PicoDiagnostics NVH
Topic: NVH Road Test
Replies: 12
Views: 624

Re: NVH Road Test

Hello Steve,

I've watched the video and can see where the adjustments are for sound now, thanks for that. I could be misreading the signals here but I got the impression that Frank was saying that a gasoline engine was diesel somewhere in the videos 6/7 I think!
by Technician
Tue Aug 06, 2019 6:36 pm
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 685

Re: Secondary Ignition scope analysis

the burn kv line should be fairly straight without hash appearance, and others are saying that no hash present indicates that no fuel is being burned I wouldn't go with either for now. Test conditions first ! That dwell will be very precisely managed by the PCM. Much more could be gleaned from prim...
by Technician
Mon Aug 05, 2019 5:13 pm
Forum: PicoDiagnostics NVH
Topic: NVH Road Test
Replies: 12
Views: 624

Re: NVH Road Test

Thanks Steve, I'll let you know, the information if recorded is on my laptop at home. I've had a look on the pc and because the saved file is not a file that I gave a destination to, if the file has saved, I'm not sure where to look on the hard drive to find it. Any help here would be much appreciat...
by Technician
Mon Aug 05, 2019 5:07 pm
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 685

Re: Secondary Ignition scope analysis

I did think about that at some point. What we saying 2500 rpm! I'm interested in the cylinder 4 dwell period that looks like a problem, however I've been advised that leads crossing over could cause the same issue? The other area of interest is the burn kv but not the duration. I have read conflicti...
by Technician
Sun Aug 04, 2019 1:45 pm
Forum: PicoDiagnostics NVH
Topic: NVH Road Test
Replies: 12
Views: 624

NVH Road Test

I've been doing a bit of learning with the NVH kit. I was concerned that the road noise from the Fiesta seemed quite loud and thought I'll use the NVH equipment to record some tests! I entered the transmission gear ratios from the manufacturer but could not find the final differential ratio, therefo...
by Technician
Sun Aug 04, 2019 12:36 am
Forum: Diagnostic discussion
Topic: Secondary Ignition scope analysis
Replies: 22
Views: 685

Secondary Ignition scope analysis

These are recorded from the Fiesta 1.4 SPJC engine after the rebuild.