I have a 96 s10 4.3 . Its goin threw spells where it wont start it has good fire good gas plenty of suction all compresion is good iv replaced coil.fuel reg. Dis cap an botton.plugs wires .ecm crank sensor the sensor in distibitor.itll start when it wants to no codes come up i had it started for 3 days parked it now it just turns over like the coil wire was pulled but all cylinders are firen its also in timeplease help