hyundai no start
2009 Hyundai sonata 2.4 L , cranks but no start , no codes, no spark but has injector pulse and rpm reference on scanner cranking, has power at coils but no ground signal from computer when cranking, cam sensor changes 5v to 1 v cranking slowly, fuses seem ok , tried 2nd known good key, have not tested crank sensor yet, manual shows mass air sensor but there is none it appears to be speed density instead ?any ideas?