Car want crank the eng turns over changed the fuel relay and fuse and fuel filter fuel pump has good presure

Check for fuel pressure / sound of pump going with key in the "on" position as it primes the fuel system. There should be a schrader valve on the end of the fuel rail, it's got a plastic cap on it - uncap it and depress the valve carefully ; if you have good fuel pressure it should be pressurized and come out fast. If not, bad fuel pump or fuel pump relay.

Did you change out the fuel filter's?Are fuel injectors clogged.

if you bang on the tank and it runs fine for sum time ! the fuel pump is on its way out !the brushes in the pump are worn !replace pump ! and relay ! relay is under the hood on drivers side

When the ignition switch is turned on the pcm turns on the fuel pump by energizing the fuel pump relay. The PCM keeps the fuel pump on as long as the engine is cranking over or running.It does this by recieving pulses from the ignition module. If there are no referance pulses the PCM will turn the fuel pump relay off in 2 seconds with the ingnition on.

Most models also include a secondary control path through the oil presure switch witch will turn the fuel pump on after it detects oil presure.cranking time will be longer if the fuel pump doesn't recieve current until oil presure switch contact is closed.

you going to have to narrow it down to see what part is defective. first check make sure you getting sparks by pulling one of the cable and use spare plug and ground it making sure you getting fire when turning engine over. 4 things need to check for fuel delivery. fuse, relay, fuel pump and crank sensor. assumed fuse and relay are good, using 12v light tester locate the fuel pump connectors and connect pos and neg terminal and have someone turn engine over and see is you getting any power to the pump, if the pump is good, crank sensor will be faulty, what crank sensor does it sense the flywheel turning sending info to the ECU then the ECU send power to the fuel pump. keep in mind, fuel pump will only turn on as long the crank sensor sense the flywheel turning.

check foe fuel pump presure at fuel rail,,,if u have fuel pump presure check all fuses with a test light not buy sight,,could be deceviving ,look at and check to see if fuel pump relay is working if no fuel presure i,if u have presure in fuel rail ,replace the cranck shaft sensor

Hi , these trucks are notorious for fuel pump issuse. (I have 2 in the shop now).First check for spark if spark is present then we need to check for fuel.if a presure gauge is avail,install the gauge and crank the engine.if presure increases to 50-60 psi fuek is probably not the issue. now if a gauge is not avail you can remove the air cleaner/snorkle assy.spray some carb cleaner in the throttle body,then try to start if (if it starts for a second the problem if fuel.now if it starts go under by the fuel tank,reach up (from the drivers side and unplug the fuel pump plug (4 wire) have some one crank the engine ande check for battery power on gray wire durring cranking,if battery power is present check black wire for good ground.if both power and grounds are present pump is no good.if now power then swap the fuel pump relay w/ same design relay (in the underhood relay center) relays are also a known issue w. the s and t trucks,good luck Thanks

check for fuel pump hum by the gas tank with the key on, if no hum check fuses and relays (under the hood and dash) if they are good replace fuel pump. if you hear humming try replacing the fuel filter

sound like fuel pump pressure low change fuel filter.if that dont fix it . probably fuel pump. if fuel pump good . get a scanner. because a bad coolant sensor cam sensor crank sensor . coil pack module could be bad.also bad pcm.

does the engine crank? could be starter