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you may have a short of some kind, when a fuse blows repeatedly it is no good just replacing, you are being told that something is wrong with the equipment.
You will almost certainly have to visit a technician for a diagnosis. It is unlikely to be something that an inexperienced end user can sort out I am afraid.
Have you checked to see if it has spark at the spark plugs, let me know. Actually there are two relays for the fuel pump, the EFI relay and the circuit opening relay, the circuit opening relay gets voltage from the EFI relay. If the computer doesn't get a spark confirmation signal while cranking then the injectors are shut off.
the wiring harness under the truck on the d side may be laying on the exhaust and it goes to the o2 sensor and also if it is a 4 cylinder it could be the harness laying across the fuel rail shorting to ground on the rail.
check all efi and ign fuses first...then check pickup coil and ignition coil in distributor w/ ohm meter...since you already replace the ignitor, then mostly likely it's the pickup coil or ignition coil...buy the whole
The fuel pump should run for a second or two when you first turn the key on, but then shuts down to prevent the engine from flooding if the computer does not get a signal from the crank or cam sensors which the computer uses to trigger the ignition system. So no spark no fuel. Check to see if you have a spark in the ignition system.
i have had this same problem.. check the exhaust pipe near the middle of the truck..
the o2 sensor was hanging down and would blow the efi fuse when the exhaust got hot..
took me months to find it..lol