alright, I took my 87 maf harness and re-pinned the connectors to fit my speed density computer, car runs good now with the exception of code 43, whats it mean, I havent got the knock sensor wired up yet so I'm hoping thats all it is, how ever it says low voltage at spark timing circuit so I'm doubtful its the knock sensor circuit, grounds don't seem to be a problem as near as I can tell, I remember on my painless speed density harness a wire off the alternator went to the ecm, could this explaing the low spark timing voltage.

thanks guys