79 zx msd problems

[speedstylez78]

hi

Im working on a 79 zx with a stock computer for an SCCA car. It runs with the stock ingnition module but doesnt when i wire up the MSD with the green and red wires. Got spark not injector pulse. So i talked to MSD and wired it up with the white wire the way they told me to and still nothing. From there I bought a tach adapter (#8920), still nothing. Then i wired a 10 ohm resister into the power feed(red wire) for the 8920. bam it runs. find out that the ECU is very picky about its RPM signal. but it will not rev past about 2000 RPMs. Anyone run into this before, or have a trick to get a MSD to run a stock 79 ECU.

 

Thanks

Justin