MSD 6AL missing

[Eljaro]

I tried out the car today. Some improvement there but there still is that hesitation. It is subtle and not easy to notice because there is so much power.
Driving at a steady speed with the engine revolving above 3000 rpm there seem to be some cylinders missing. I do not know if the MSD 6AL box is defective, and if it is how to check that (maybe with an oscilloscope) or if it is the magnetic pickup. The basic measurements with the ohmmeter check out ok.
I changed all the plugs, I use a new distributor cap (the one with the venting holes), the plug cables are new super conductor from MSD and the coil is new also.
So my problem is still unresolved

[undy]

Are you 100% sure it's not a carburetion problem?

[rokndad]

Stefan,

Make sure the gap between the 8-bladed reluctor inside the distributor is no more than .025 inches away from the magnetic pickup. Believe it or not, those two stainless hex screws let the pickup move around bit when tightening them up. Don't forget the silicone adhesive to lock it down. And put a little light oil on all the iron parts to keep them from rusting up so quickly.

You can do it with the dist in the engine, but it's easier with it out. Let us know if that is an issue.

Tom

[Eljaro]

The gap between rotor and pickup is 0.025.
From what I have read in the MSD Troubleshooting forum the distributor pickup either works or doesn't. So I do not know if replacement will be the solution. Same goes for the 6AL box according to MSD tech support. Or maybe not.
Something somewhere is wrong.The car basically runs fine except for that continuous hesitation which sound like misses. It gets worse as the engine gets hotter.When fully accelerating there are no such misses to be noticed. Only when driving at a steady speed at around 3000-4000 rpm.
What else is there to check?

[BDR561]

Originally Posted by Eljaro

The gap between rotor and pickup is 0.025.
From what I have read in the MSD Troubleshooting forum the distributor pickup either works or doesn't. So I do not know if replacement will be the solution. Same goes for the 6AL box according to MSD tech support. Or maybe not.
Something somewhere is wrong.The car basically runs fine except for that continuous hesitation which sound like misses. It gets worse as the engine gets hotter.When fully accelerating there are no such misses to be noticed. Only when driving at a steady speed at around 3000-4000 rpm.
What else is there to check?

Double check the gap... I had this issue a few months ago when I replaced my dead pickup. I couldn't get past 3000 - 3500 and the motor would break up, the tack would go berzerk and the car was bouncing off the MSD rev limiter.

Does your tach jump once it reached 3500 - 4000?

Once I passed the 3000 - 3500 rpm limit the tack started registering numbers beyond my rev limiter (even though the motor was still at 3500 rpm) and I would start missing/breaking up from the cyliner deactivation.

It's hard to measure that gap... I thought mine was OK and I was off .010, double check it.