| Page: |
| Home > Help Needed / General Tech Chat > What option to choose to get the engine running | |||||||
 2619 Posts Member #: 1246 Post Whore Lowestoft, Suffolk. |
16th Aug, 2019 at 10:47:22pm
CPS gap correct and screen/shielded cable earthed correctly?
|
||||||
|
113 Posts Member #: 11786 Advanced Member |
17th Aug, 2019 at 01:52:37pm
yes the gap is correct, and the cable came with the wireing loom from specialist components - dont know if it is shielded but if it is it should be earthed correct. Also i get a good crank signal and have a good spark at cylinder 1 |
||||||
|
2619 Posts Member #: 1246 Post Whore Lowestoft, Suffolk. |
17th Aug, 2019 at 09:46:43pm
Good ground and live feed to the ECU?
|
||||||
|
113 Posts Member #: 11786 Advanced Member |
19th Aug, 2019 at 07:36:38am
i measured the ground of the ecu and the coil - both seem fine.
|
||||||
 (2)[/url] by [url=https://www.flickr.com/photos/150672766@N03/]Rod Sugden[/url], on Fli) 5988 Posts Member #: 2024 Formally Retired Rural Suffolk |
19th Aug, 2019 at 10:31:44am
On 16th Aug, 2019 JackZwiebel said:
I checked the direction from the timing light and put it on the same direction at every cylinder. The question that came to my mind afterwards is: Do i have to put it on the wrong way around on two cylinders? .... since they are on opposite sides of the coil? If it is the kind of inductive pick-up timing light that has an arrow marked an the "clamp" jaws - and only if it is the type marked with an arrow (not all of them work the same way, so not all are direction sensitive) - then bizarrely, yes. With the Ford (or any generic) wasted spark coilpack the current flows in a circle - on each half of the coilpack, the current flows out one end and jumps the centre to outer electrode gap on one plug, then on through the head and jumps the outer to centre electrode gap on the other plug, then back into the other end of the coilpack half. That, in part, is why the spark energy is different on two of the plugs to the other two. For a quick test, swap the 1 and 4 leads with each other at one side of the coilpack and the 2 and 3 leads with each other on the other side. ie, with the two halves of the coilpack viewed with the coils vertical (the two separate coils are pretty obvious on the Ford one) swap top to bottom each side. And see if the misfire moves. EDIT - typo Edited by Rod S on 19th Aug, 2019. Schrödinger's cat - so which one am I ??? |
||||||
|
113 Posts Member #: 11786 Advanced Member |
19th Aug, 2019 at 09:25:00pm
Thanks Rod, i had time today to do some testing and driving and tried putting on the timing light backwards on the two zylinders where i dont get a decent signal and suddenly i have a perfect signal. So ignition seems to be fine.
Edited by JackZwiebel on 19th Aug, 2019. |
||||||
|
1267 Posts Member #: 831 Post Whore Montreal, Canada |
19th Aug, 2019 at 10:37:23pm
The first thing you should do is swap the leads as Rod mentioned. That will either confirm that there is a problem with spark energy in one direction or not. You can then consider what to do based on this information. |
||||||
|
113 Posts Member #: 11786 Advanced Member |
20th Aug, 2019 at 05:29:18am
on idle i have a good spark energy at all cylinders now, so swapping the leads doesnt change anything. While driving i cant tell wich cylinder is missing out.
|
||||||
| Home > Help Needed / General Tech Chat > What option to choose to get the engine running | |||||||
|
|||||||
| Page: |