2001 4.0 XLT turns over no start

This thing died 10 times on me in 70 miles...got home , no it won't start. Put new coil pack, it was cracked in about 12 places, ran fine, now it won't. Changed crankshaft position sensor but still have no rpms or a running truck. The inertia switch is pushed down.
I'm thinking a cliff would be perfect and cut my losses, but, I like the truck...any ideas of what I'm missing...oh, new fuel pump, air idle sensor, no fuses blown... I'm lost...H E L P, if you have an idea...thanks

 

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...gas?

Sorry, that sounds facetious, but sometimes the simplest things can be easily overlooked, especially when the problem becomes a head scratcher.
If it has gas, is the fuel pump working?
Are the injectors injecting?
It sounds like you've taken care of the ignition side, so you might want to check out the fuel side of this quandry,

Dean

 

Yes, new fuel pump, fuel is coming out fuel rail.

 

You still need to test the injectors, themselves.
You can have fuel in the rail, but if the injectors themselves aren't working, no fuel is going to get into the cylinder.

 

But why would they stop all of the sudden?
I changed 5 relay's, pumped the you know what out of gas pedal and it started up and died several times, but got it moved into the shop closer to tools...
Is there a fuse or relay for injectors? I'm thinking it's the computer....but thanks for helping, I do appreciate it...

 

To be honest, I don't know why your truck stopped working all of a sudden...but I can tell you one thing, pumping the gas pedal doesn't do anything for an FI engine. Its not a carburetor...but what you probably did do was give something some time to.....adjust (or whatever you want to call it) and that's why it started.
It's like when I worked on the big trucks.
One of the mechanics took the whole day and tore apart a 15 speed Eaton, because there was some kind of issue and no one could figure out the problem.
When I asked him what he was doing, he said he was taking the whole thing apart and checking each part for any issues. Either he was going to find the problem, or the last thing in his hand was going to be the problem part...because it had to be. Everything else checked out.
Process of elimination.
Leave no stone unturned.
Check the injectors.
Not saying they are the problem, for sure, but until you can sufficiently and confidently eliminate them as a problem, you will never know if they're the cause or at least a contributor to your problem (and that's something else to consider...you may have multiple problems causing this issue).
...and yes, the injectors contain a solenoid, so there has to be a fuse to protect them.

 

Dean,
I really do appreciate your patience, wish I had more with this thing. As of this afternoon, it'll start up without pumping it, rev to 4000 Rpm, come down to 3000 Rpm, then die unless I pump it barely, then start back up the same way and do it again...can I just check injectors by the screwdriver listening or the noid light method?
Thank you, Gary

 

The old diesel mechanic in me says pull'em and test'em individually, but not everyone has an injector tester and I'm not even sure if one will work with an electronic injector so, yeah, if you can hear them click with a screwdriver, that should be good enough.
...and your obd never picked up any codes?

 

Nope, not recording any codes.

 

Bizarre.
Ok, assuming the injectors are ok, is the wiring intact?
My truck is currently side-lined because it starts, but barely runs.
I asked the internet but didn't ask correctly and ended up replacing a part that didn't need to be.
then I found something.....rat turds.
I'm almost 100% sure there's some chewed up wiring somewhere. I just have to dive in and find it.
I don't suppose you've dug around and checked the wiring, have you?

 

I've tried. Looking for something out of sorts... I did find a braided ground strap from firewall not hooked to motor, but not real sure where it goes. I just had shoulder surgery, so, can't do too much right now...but I'm searching... I thought these obd testers told everything... I'm going to look more tomorrow...thx Dean

 

Sure. Good luck.

 

...btw, I think I found how that ground strap mounts (my truck's a 2.5, so its probably different in my engine bay).
Found this picture on the net.
Look at the red circle.....see it? Looks like a braided strap going across that opening.
When you get back out to your truck, take a look around that area and see if you don't see a threaded hole that you can attach that ground strap to.

 

That ground strap is ok, mines by coil pack. Btw, I took new coil pack off and put old one on, started up and it ran ruff enough but stayed running long enough for me to hear a big vacuum leak. Found it on passenger side of engine hose to metal tube, pushed back on, smoothed out some and another on other side, shut engine off to push it back on, started up and ran perfect, drove a couple miles, never skipped a beat... hopefully I have it...Dean thank you for the help and suggestions...Gary

 

Shut it off, as long as it took me to write last post, I tried starting again, it wouldn't, had to pump foot feed and then it did... I still need to check fuel pressure on rail...

 

Well, at least you got part of it conquered.
Sounds like you've got one more leak in the fuel system somewhere. Not holding suction, so everythings draining back to tank...or....somewhere else!

 

Go to harbor freight and get them there all day long

 

Check this video out. No it’s not a ranger but he does a great job explaining exactly step by step what to do in this situation. Let me know how you make out!