I replaced my head gasket in my 03 disco2 I’m not a mechanic so I YouTubed it and Doug showed me how to take off and replace everything and I did it verbatim now my truck won’t start is there anyone who might be able to assist me in what I should do thanks

 

Start with the basics. Do you have spark, is fuel getting to the injectors etc

 

Just what this fella said!

Take it from the top. Could be as easy as something not plugged in.

 

When you mean it won't start do you mean it won't turn over or it won't fire up and run??

If it won't turn over I would double check all your starter connections. If it turns over, but doesn't fire check the CPS connector, IAC connector, (also make sure the SAI connector if equipped isn't swapped out with the purge control valve connector. Grey = SAI & black = Purge Control Valve). Did you remove the fuel pump relay? I've seen some people remove the relay to let the engine die and remove any pressure in the fuel system. Then they forget to re-install it after all the work is completed. Just check the small stuff first and report back.

 

All connections are good but no spark and no fuel but when I disconnect the connection going to the fuel rail gas pours out secondary air is not equipped

 

So it's a crank no start? The starter is turning the engine over as long as you hold the key in the start position?

Fuel is getting to the rail at least it sounds like. Are your spark plugs wet with fuel if they aren't firing?

And have you verified you aren't getting spark with a spark plug tester, or by holding a plug against a ground?

 

Yes no and yes

 

did you press the inertia reset switch on the passenger side firewall?

 

Coil pack connectors plugged in?

 

Crank position sensor plugged in securely? It's kind of a PITA to get to...