Is there a way to test coils packs ?
I have measured the HV side impedance on coil packs before to help identify a failing one. It worked on my BMW, the good packs showed roughly 20M ohms and the bad one showed about 5M ohms. Use an ohm meter to measure between the sparkplug connection and the input ground connection (disconnected out of the car of course). Haven't tried it with my 360 yet...
I will change shortly ...I ordered and replaced 6 new coils from Micks(had already replaced 2). Ran good for 2 days then started running like it had a bad coil again ...
Even new coils you gotta be kidding me !!! I hope not !!! I have to check paperwork but I think 3 years ago...
As I posted above, use an ohm meter and measure between the sparkplug connection on the coil pack and one of the pins on the low voltage connector. I don't have the connector pinout with me, so just try all of them. You should get a reading in the meg ohms. Just compare them and if you see one with a significantly lower impedance than the others, its probably bad. The good ones on my BMW were 20M ohms and the the bad one was 5M ohms. The lower impedance is caused by shorting of the windings on the secondary usually due to excessive heat. This causes lower voltages (weak spark)
I have an Euro car and it throws NO codes. I had one spark plug loose and the threads were black . I dont think the gap was too big there were only a year old . I.will test coils later just to.eliminate easy things .
DJ, if you pull the coil from one plug at a time and put a known good spark plug into it and then run the engine while grounding the spark plug you can observe the spark from each coil and if one is faulty it will immediately be obvious. Just make sure you have a good ground to the thread of the plug and make sure the spark is coming off the central electrode to the prong and not bridging the wrong way. If all coils pass you could then test again but this time using the actual spark plug from that coil. Best to put an old plug into each cylinder as you do the test though. You might also be able to shortcut to the problem cylinder by disconnecting the low voltage connection to each coil as the engine is running. It's normally quite easy to discern the engine falter a little as you disconnect/connect the coil lead. If you find one that makes no difference you've probably isolated the problem. Best of luck.
thanks all, it wasnt the coils be something more serious. But I was a dumb arse because i had tested them before by unplugging each to see if the the idle changed. doing that again went over my head ...
Hasn't been oficially diagnosed , when too it to the shop , it appears it may be variator throwing timing off
Sorry again. In times like this all I can suggest is "Don't Panic!" Often the early diagnosis is worse than the final outcome. Best of luck.
Shortly after arriving at the shop while going over it it develops a slight not what's the mechanic said was the variators. From my experience things are usually worse not better. So if its the variators then I'll do the belts. I have no records of them being done and I have 102k km.
