Engine won't start and it back fires while trying to start.

Are you saying the starter is grinding but the engine is not cranking, or the engine is cranking and making noise and not starting ?

i would check and see if spark pluges are firing. you can take one out and plug into spark plug wire then let the bottom of the plug sit on engine and get someone to try to start while you look at the plug to see if there is any fire. if you have no fire or fuel it would be the crankshaft sencer. it could be the timing belt but the motor would sound different turning over then it used to.

Coil packs do not have firing orders, engines do. I suspect you were given the incorrect part.

Back firing is usually an indication of a timing issue

The timing chain is most likely worn & jumped a couple
of teeth or the distributor was installed wrong,if you recently
had work done

The first thing I would check is fuel pressure. This type of fuel injection requires a minimum fuel pressure in order to operate. If fuel pressure is as little as one psi below minimum the vehicle will not start. You can try squirting a couple of shots of carb spray into the air snorkel while somebody cranks the engine over. If the engine starts and then dies you now you fpdeffinetely have a fuel issue. If the engine still won't start check for spark. Let me know what you find. Let me know if you have any questions and I'll do my best to answer them. Thank you for using FixYa.com!

I’m happy to assist further over the phone at https://www.6ya.com/expert/jeremy_d728a59f986299fa

Maybe needs a new radiator, thermostat, how is the water pump?I had this engine for 400.000km.

If the engine won't fire up, but your starter turns over, you may want to check your timing unless you have a check engine light on. If the CEL light is on, have the codes scanned.

If the engine won't turn over with the starter or it clicks, have your battery tested at autozone or advanced auto parts. Replace the battery if it is bad. Else, have your starter tested.

If the engine still won't turn over and the battery and starter are tested fine, you may have a blown fuse, bad ignition switch, or a failed relay.

If the engine fires up but randomly dies and starts back up, you either have a failed sensor, failing fuel pump, clogged fuel filter, bad plugs or wires, or a failing ECU.

I’m happy to help further over the phone at https://www.6ya.com/expert/jeremy_69f3cc28d95bf514

check fuel pressure regulator,throttle position sensor,mass air flow meter

Does your engine turn over, just not fire? if it sounds like it wants too start but its not firing, try your distributor. this happened to my car last week actually, went out and bought a new dist. and it is fine now. its a big expense, so try to find one at a junk yard and they say you can take it back if its not that. thats your best bet. hope it helps.

tcm is located in drivers side front wheelwell. will have to remove wheel and wheel well splash shield. unhook 60 pin connector and three screws holding tcm to vehicle. will have to set pinion factor and quick learn function via factory scan tool solenoid pacxk located below air cleaner on transmission facing front of vehicle