73.5 T Ignition Distributor problem?

[rockreid]

My agony project 73.5 Targa from cardboard boxes and a naked tub continues.

Just a quick rundown: 73.5 911 Targa 2.4 stock internal engine. MSD 6A Ignition. Upgraded Bosch alternator w/ new deeper alt housing. New distributor cap and new rpm limiting rotor.

Two months ago I installed the engine I have rebuilt in my garage and fired it up. It ran great for 5 minutes while I danced in the driveway patting myself on the back. It then died. No spark. I checked fuel pressures as well and they came in low. So I sent the fuel distributor away for rebuild. Fuel distributor is back but still cannot diagnose no spark condition.

I sent the MSD unit away for repair and just got it back over this past weekend. I can finally get spark straight from the coil connected to a spark plug tester while manually grounding the trigger wire. Fine. Hook up everything to the ignition distributor and nothing. Spark tester will not spark. I check and adjust points to 0.016 and still nothing. Is my Bosch distributor toast? AS far as I know it has never been rebuilt but the PO says the car was running before he disassembled. The Bosch distributor has no shaft endplay, everything seems tight as it should be. What else can go wrong inside these distributors?

[E Sully]

How do the rotor and inside of the cap look? I think I read that you have to use a different rotor with the MSD. The rev limiting one may burn out with MSD.
Ignition Rotor Meltdown

[larrym]

Originally Posted by E Sully

How do the rotor and inside of the cap look? I think I read that you have to use a different rotor with the MSD. The rev limiting one may burn out with MSD.
Ignition Rotor Meltdown

i too have heard about that issue - but i ran a stock resistor rotor in my 2.7 with pertronix & msd for many yrs with no problems

as for OP problem

- i'd first be looking for a short or ground at the points inside, or for a broken braided ground wire in the dizzy, given that the thing sparks when points are not in the loop