Hey guys,

Just wondering if anyone else has seen this. I have an E6X installed in my 87TII (stock ignition), and when checking the timing for the leading ignitor, when I hook up the timing light, sometimes it will show that the coil is firing 180 degrees off. All I have to do is open up the timing light clamp and close it again, and it goes back to flashing on the proper timing mark. All along, the car is running perfectly smooth. This occurs on both L1 and L2.

I have seen this occur with two different timing lights, so I don't think it is a timing light problem. I also have the reluctor gain set to 0 for both the home and trigger, and a falling edge for both as well.

Anyone else seen this or have any ideas?

Thanks,
Greg

 

Are you using a 4 stroke light or a 2 stroke light? If it's a 4-stroke, that may be what's causing your problem.

 

The leading coil fires both L1 and L2 at the same time, at all times, they are the same coil, and fire in "waste spark" which would fire twice in one rotation, or 180 degrees per fire. I think this is the reason, and is normal. Someone correct me if I'm wrong.

 

You're not wrong.

 

That's completely normal.


-Ted

 

The timing light I am using is just an inductive pickup light. There are no settings to change on it, so I would assume that it should work fine?

Greg

 

OK, quick question. How many times does the leading coil fire, per rotation of a rotor. Does it fire 3 times, or 6 times?

Whoops, just reread your post a little closer... So, if the coil fires twice per eccentric shaft rotation, that would mean it would fire 6 times per rotor rotation?

Thanks,
Greg

 

That is correct.


-Ted

 

Hmmm... so the timing light should normally fire at the timing mark and 180 degrees from the timing mark. Now my question is, why do I sometimes not see the timing marks. Is the coil actually firing too fast for my timing light to pick up each spark, and it only picks up every second spark?

Thanks for the info so far,
Greg

 

It's actually a little bit of both.
If the ignition system is totally stock, it tends to miss about every 4th spark.
Then, on top of everything else, most inductive timing lights don't pick up every spark event.


-Ted

 

OK, thanks Ted!