Fuel pressure is checked by connecting a pressure gauge to the fuel rail. With the key on you want to see 30 psi or more.
Ignition spark, remove a plug, reconnect it, ground it, crank the engine and you should see spark.
Injector pulse, unplug an injector, plug up a noid light in its place, crank the engine and the light should flash.
Compression is checked with a pressure gauge threaded into the head in place of a spark plug. You want 115 psi minimum and all cylinder to be the same.
Thanks for asking your question and letting me try to help you.
If your confused on why or how to rate me, let me know.
I'm only paid from the deposit you've made when you rate 3,4, or 5 stars.
Follow up/Reply as many times as needed before or after rating.