If anyone can help, I've got an '83 non turbo z. It decided not to start the other morning. I've gone through all the normal tests. Fuel is getting to the injectors, coil is good, spark at plugs is ? ok,(it bit me pretty good). 2 thoughts, 1) is there any way on a z the timing chain could jump and throw the timing off enough to where the car won't start. 2) is there any other electrical connector that would defeat ignition i.e.bad oil sending unit or lead to it. My last choice is to pull the efi unit and take it to the dealer to see if he would check it out.