[rr262]

Not Good.....

I quickly wired in a different MSD 6AL box and had exactly the same problem. The car starts and idles perfectly but cuts out at 3500 rpm.

Here's the thing. I have been methodically troubleshooting a cold start problem most of the winter. I checked the operation of the cold start valve and checked fuel pressures (system pressure, control pressure and residual pressure) and they were all within spec.

When the car had trouble starting it seemed like the spark being applied was interment..the car would fire for a bit, then stop. Once the car was started it ran perfectly. If the car was warm, it started and ran just fine.

Given my experience with the permatune box(es), I decided to convert to the MSD.
This seems to have fixed the starting problem completely, but now I have this new issue.

(BTW, when I reinstall the permatune box on the car with a warm engine, the car starts fine an the RPM limit problem goes away. The car starts perfectly with the MSD box, and once started or warm, runs perfectly with the permatune box.)

some data:

1) I am running the MSD blaster coil.
2) I did not replace wires, cap, rotor or plugs, which are all relatively new.
3) Plugs are gapped to the recommended permatune value (.065)
4) Cap and rotor look in pretty good shape and have less than 1000 miles on them.
5) I have a relatively new BERU wire set (p/n 10-8533-613). I am assuming they are not solid core wires (I pulled off the coil lead and looked and it looked braided to me) If someone wants to tell me that they are indeed solid core wires, this is the cause of my problem, and I am a complete idiot for not figuring that out by myself, I would really appreciate it.

I am totally stumped...my suspicions are some sort of EMI problem causing the box to cut out..

Any ideas on this puzzle?