Cranking but fuel injectors not opening.Ignition is okay and fuel supply is okay. Crnak and crank then we check the sparkplugs,all dry,no fuel injected in all cylinders.checked fuel supply upto the injector rail,supply is normal.efi fuse okay.

I guess you mean the starter cranks, but the engine never runs. That could be fuel or ignition. If fuel, spraying starter fluid into the air intake, then cranking, will get the engine to run temporarily. If ignition is bad, it won't run.

A fuel problem could be fuel filter, water in gas, fuel pump, or either carburetor or fuel injector is bad.

Electric could be wiring, ignition switch, distributor or sparkplugs, sparkplug wires problems.

You need to check the fuel presser the injectors will not open if you do not have fuel presser, all the best.

Excessive cranking will put too much fuel into the engine. Have you tried holding the gas to floor and see if it starts. That will help clear out excess fuel from continued cranking.
Check for spark at a sparkplug wire. This will tell you if ignition system is working. You need to see a blue snapping spark to know ignition is good. If you are not sure how to check for spark, have someone help you. Easy to get a shock when checking for spark. You need the metal end of the plug wire just 1/8 inch to 1/4 inch away from a metal bracket or bolt on the engine. Hold it steady while someone cranks the engine over-watch for a strong blue spark to jump from metal end of wire to the engine. If no spark, your ignition system needs checked. If spark is good, have the fuel pressure checked-maybe it is getting too much gas.

Is the computer powered up? Does your check engine light come on when you turn the key to on?
If that's o.k., check fuel pump operation. Do you hear the pump come on to prime the fuel system when you first turn the key to on? It should turn on for about 2 seconds, and then stop again until the engine is being cranked, at which time the pump comes back on. You can't hear the pump when engine is cranking or running, but you could hear it first come on to prime the system. There may be a schrader valve-a test port- on top of engine on the fuel rail. If you find it, take the cap off, and press down the valve-gas should shoot up if the pump is working and getting fuel to the engine.
Now if the computer is powered and the pump is getting gas to the engine, and still no start, you need to check your ignition system by checking for spark at one of the sparkplugs. Pull a plug wire off a plug, pull the sparkplug out, reattach the plug wire to the plug, and lay the sparkplug on a metal part of the engine, so the sparkplug threads are touching metal (grounding it). Now have someone crank the engine over while you watch the plug for a strong blue spark there. You need to see a blue, snapping spark to know your ignition system is good. An orange spark is not good-too weak. If no spark, or not consistent, you have a problem in the ignition system, and will have to diagnose and fix that.
If all is good so far, you may need to check the fuel injection system. Start by pulling one injector connector off, and check for power on one of the two wires going to the injector (the other wire is the injector ground wire), with the key in the on position. If no power to the injector with key on, the injector drive circuit has failed. If one wire does have power, post back to me for how to test the injector ground circuit-very easy with a testlight.
Good luck.

use a digital volt meter,put it on the ohm scale check number 2 fuel injector should be 11 to 16 ohms if not reads zero fuel injector faulty.if numbe 2 fuel injector okay.use noid light hook it to fuel injector electrical connector with fuel injector disconnected and see if pcm is firing the fuel injector noid light should blink when cranking the engine.if light steady pcm not firing 2 fuel injector,if noid light dont light up.there is a open in the wiring connector 2 fuel injector 2. if fuel injector okay,check spark plug, carbon foul you have a bad ignition coil or wire if you see oil on spark plug you have worn piston ring or leaking valve guides allowing oil to foul out spark plug.do a compression test check compression to see condition of the cylinder.

Engine is cranking? Check if the fuel pump is working, fuel pressure right and injectors. Check starter and solenoid. Also ignition switch. If all this its OK, then go to sparkplug, coils.

Keep us updated.

Does the fuel pump run when the key is first turned? Should hear a buzzing/whining from under the bed of the truck. If not, check fuse and relay then check the fuel pump itself. If okay move to next.

Check all other fuel, ignition, pcm/ecm/ecu fuses. If no problems, then on to next.

Crank the truck over for a bit, then pull the spark plugs immediately, check for gas smell/wet sparkplugs.
- If wet, check for spark by cranking truck over with one plug out of engine attached to plug wire, with end of plug grounded against engine (careful not to get a shock when holding the plug).
- If dry, verify injectors are clicking when cranking (hold long screwdriver against injector body, and place ear against screwdriver while someone cranks over the engine). If clicking, check fuel pressure at rail. If not clicking, check ECU connections.

This could be many reasons depending on the milage on the vehicle. Check timing, check battery terminals, clean tighten, check fuel filter and injectors, mY HAVWE WATER IN FUEL, ADD SOME WaTER ELEMINATOR, check ignition coils, may want to purchase a repair manual cost around $20-25.