bracey
|
| posted on 10/1/07 at 04:48 PM |
|
|
testing a coil
is there a way to test a coil ? may sound thick ! having trouble starting engine checked obvious things
|
|
|
|
|
graememk
|
| posted on 10/1/07 at 05:03 PM |
|
|
power it up and put it on your tounge (this is a joke btw) if you wake up in hospital you know the coil works.
[Edited on 10/1/07 by graememk]
|
|
|
RazMan
|
| posted on 10/1/07 at 05:39 PM |
|
|
Locost way is to connect a lead & plug (with plug earthed) and then apply 12V to the coil terminals. If you get a fat blue spark it works !
Cheers,
Raz
When thinking outside the box doesn't work any more, it's time to build a new box
|
|
|
BenB
|
| posted on 10/1/07 at 06:12 PM |
|
|
If you pull it out and your girlfriend gets pregnant it was working...
Oh sorry, wrong type of coil.....
|
|
|
tks
|
| posted on 10/1/07 at 06:17 PM |
|
|
coils are dangerous
also their components
i mean if a coil sparks it still doesn´t mean its in a good condition
i would search for a known good one and compare...
have seen coil issues
a spark is one thing 50 a sec is another
Tks
[Edited on 10/1/07 by tks]
The above comments are always meant to be from the above persons perspective.
|
|
|
Peteff
|
| posted on 10/1/07 at 06:48 PM |
|
|
I swapped one on the neighbours car not long ago. As said, get a known good one. We put a plug lead and plug in the king lead from the coil and turned
it over with the plug earthed to the block and it sparked about 5 times then died gradually.
yours, Pete
I went into the RSPCA office the other day. It was so small you could hardly swing a cat in there.
|
|
|
02GF74
|
| posted on 11/1/07 at 09:09 AM |
|
|
is you have a DVM, set to resistance/ohms, reomve coil and put across + and -ve terminal;
you should see 3 ohm for standard coild, 1.5 ohm or ballasted type. Higher resistance or open circuit indicates problem.,
Do the same but one porbe on the can and other in the king lead - there should eb continuity, not done it but would expect in range of 100 - 10 K ohm;
again if open circuit, then dead.
then refit ad do as ^^^ suggested.
|
|
|
MikeRJ
|
| posted on 11/1/07 at 10:07 AM |
|
|
Measuring resistance of primary and secondary and show up opens or shorts, but won't tell you if the coil is breaking down under high voltage.
Likewise, a coil can work perfectly in open air but fail when trying to fire a plug under compression. Substitution is the only easy way of
diagnosing a duff coil.
|
|
|
macnab
|
| posted on 11/1/07 at 10:20 AM |
|
|
You can get very simple spark gap gauges (I use one myself) they have a coloured scale and you can open the gap the spark jumps till it stops, then
read off the scale to see just how awful it is.
Simple is best...
I have found that having the spark just jump across the plug gap means very little, as it can still be too weak
[Edited on 11/1/07 by macnab]
|
|
|
tks
|
| posted on 11/1/07 at 10:48 AM |
|
|
quote:
Originally posted by Peteff
I swapped one on the neighbours car not long ago. As said, get a known good one. We put a plug lead and plug in the king lead from the coil and turned
it over with the plug earthed to the block and it sparked about 5 times then died gradually.
I bet the inner cooling oil went hot!
and then it simple dies..
Tks
The above comments are always meant to be from the above persons perspective.
|
|
|
macnab
|
| posted on 11/1/07 at 12:15 PM |
|
|
hmm certainly leaving the ignition on with the engine off does a good job of cooking the coil.
|
|
|
