i have a 95 comaro 3.4L with distributer less ignition {hall efect switches}or crank sencers. problem is ignition is good (good spark) not fireing in time ,took to dealership and they told me it was probably timing chain ,i checked timing chain and it was good, dealership checked all sensers and all were good . if this thing had a distributer i would have the problem figerd out by now! can you help me out.changed out timing chain anyway didn't help , tries to fire but .new plugs wires modual

 

put new timeing chain on 3.4L not fireing at tdc timing chain was put on proper ! was told you can't adjust timeing because there preset. is this true