I have just swapped my 420a with a 420a with less miles . I started it up 2 weeks ago and it ran fine and then it ran out of gas , because my old fuel rail had a leak and i replaced it , after replacement it ran fine but ran out of gas considering the leak in the old rail . But it did start . Just yesterday i put my lambo doors on , put in tranny fluid and put gas and fuel cleaner in . Tryed to start and it cranked , battery is good , starter is cranking , but nothing . I checked the spark and theres nothing . And its not the coilpack , i changed the plugs and wires . What else could be wrong here , is there something i should hook up , is it the ecu , is there something im not seeing , a ground or something. I did install a flip out and some gauges in my interior but that wouldnt affect it would it ? or the wiring to the doors that i had to cut and extend???? need some good advice!

 

check the cam angel sensor, they tend to go bad with the 420a. If its not reading right it thinks the timming is all out of wack and it wont give the car spark. Just incase though check and make sure that your getting fuel and that you didnt pop a fuse for the ecu.