Buch of new parts!Ran 2 days.Won't start

'95 blazer 4.3w 4x4.
Parts replaced: Fuel injector unit,fuel filter,and intake gasket
(September 05)
Plugs,cap,rotor,and wires,fuel pump,and screen
(a week ago)
Swapped module with another just to see if it was bad
(last week also)

fuel inj.unit was replaced in september,truck ran fine
till last week.
Truck would not start with out starting fluid and sometimes S/fluid wouldnt help.So I replaced fuel pump in tank ,another filter,and also the sock at the bottom of the pump.while having in the garage i decided on a tune up.Plugs cap,rotor,wires,air filter.
After putting it all back together the truck started a ran fine for 2 days, than she went to work last night and now it wont start again. I'm about to run across town and try to get it home without towing.Figured i'd leave a message on here,hoping i will get a response by the time i get back home.
Oh yea I have good spark coming from the coil and more than 1 plug wire.I'm taking a spare coil with me just to see.This truck doesnt matter if its cold or warm.It's acting just like it did before fuel pump R&R. I'm also goint to check fuel pressure again while im gone.

Don't really know what else to do. Will the knock sensor act up like this?
Truck had good fuel pressure when it left.good spark good everything.Now its doing the same thing it did before I replaced all them parts.As if that was never the problem and it just decided to start and run another day or 2.

Have you looked into the FAQ How TO's.
http://www.automotiveforums.com/vbulletin/showthread.php?t=503238
It is very helpful. Look at this link I have posted, It looks a lot like your problem.
Thanks
SC

Have you looked into the FAQ How TO's.
http://www.automotiveforums.com/vbulletin/showthread.php?t=503238
It is very helpful. Look at this link I have posted, It looks a lot like your problem.
Thanks
SC
Thanks SC. But I already replace the injector unit,nut kit,and intake gasket.

Thanks SC. But I already replace the injector unit,nut kit,and intake gasket.

Instead of just throwing parts at it, you need to find out where the problem is. Do you have good spark, fuel, compression? When it won't start, pull a spark plug. Is it wet or dry? Does it smell like gas? If not, check your fuel pressure. Do you have a good blue spark at the plugs? If not check another. If still not, check at the coil.

Too many things can cause it to not start.