Thanks guys.
The tach worked fine.
I went to the spout connector and found it to be loose(damn plastic plug ins) so I spliced the connection. No codes
Thanks again
SCbird
Oxford white, rebuilt engine bored 2 over, ported and polished head, intake and exhaust manifold, S model charger, 70mm mass air flow sensor, 70mm throttle body, intercooler fan, rebuilt 5 speed.