Crank no start

I have a 2003 4.7l v8 Toyota tundra
It was driving fine I went to a job and before I tried to leave it wouldn't start. 2 days before that I had to change the battery because it wouldn't start. It worked for the 2 days but then just stopped. I've changed the battery, the starter, the fuel pump/ filter, and all the relays. It finally has a crank but just won't start. I've checked spark plugs all the wires. But my fuel pump isn't getting power/ and I've taken the truck apart and there isn't a fuel safety switch as far as I know. Can anyone help me out I can give the vin. The truck doesn't have a Manuel and I can't find one online.

 

Check your battery cables for corrosion. Common issue with these trucks.

For manuals (including full service manual), see here. https://www.tundras.com/threads/so-you-wanna-buy-just-bought-a-1st-gen-tundra-eh.115928/

 

As that thread will tell you ^^

These trucks have lots of issues with rodents. They like to nest under the intake, chew the starter and knock sensor wires. They like to nest on top of the tank, and chew up the fuel lines, fuel pump, and its wires.

Also in there, the Crankshaft Position Sensor wire often gets misrouted during timing belt changes, and will get nicked by a belt, and the ECU will shut off the fuel pump if its harness gets damaged by a belt or pulley.

But more than that, If you don't change your timing belt with OEM-grade equipment at least once every 100k miles, and that belt snaps, you may be hunting for a new engine.

What I would tell you is this:

• Stupidity check: Verify the EFI1 fuse (fusebox under the hood) is not blown, and while you're in there, check all the other fuses!!
• Get a 10mm socket; pull back whichever timing cover is easiest to loosen; don't need to take it fully off, just loosen it, inspect the timing belt, and look for evidence of failure, or belt damage
• Locate the crank position sensor, it's at roughly 4o'clock position just behind the crank pulley (largest crank at middle of engine block), trace its harness upward, it should go behind the fan pulley bracket, inspect the FULL harness for damage, especially if it's not routing behind a bracket
• Get a mirror and flashlight, look on top of the tank for any signs of nest material, etc.
• Grab your positive and negative terminals and try to forcibly try to wiggle them, they shouldn't budge.

Let us know what you find out.

 

Any chance this kind of thing would throw a DTC without illuminating the check engine light or am I way off base?

I'm probably hung up on DTCs because I just pulled a few out of a Mazda with no check engine light on.