PLEASE HELP!

[Monicadena]

this is the story: my 240 was idleing erratically, so i took it to the mechanic, the mechanic did a diagnose on the car:
1.- needed an EGR valve ... done, just sat a new one
2.-o2 sensor..................changed last night
3.-ideler control valve.......waiting on it
4.- transmission oil and filter change....i just did... but after all this changes my car wont start... i wonder what else went wrong, i have thinking about changing the fuel injectors, since the ones it has are called "viper" it was the cheapest i could get at that time (almost 4 years ago) groomits are a cracked so i dont know if this could cause my car not to turn on... i cheked the spark plugs they are fine, i will change my distributor cap and rotor as soon as i get them , i checked the fuel pump is ok so i have spark, fuel, but no ignition!! do you guys have an idea on what could it be? im desperate! please HELP!!

[blkvrtswp]

I would look at the battery wiring and all around the fusebox and battery and alternator and starter harness for something that got jiggled loose or pulled out accidentally while you were working on it.

Also when you say "won't start" - is it cranking strong and almost starting, cranking strong but not almost starting, cranking slow, or just clicking and not cranking at all?