Chevy Suburban, 138,000 miles will not start

Could be a bad idle air controler. They fail like that sometimes.

Thank you, I forgot to mention that until this happened the truck was running very smoothly, no issues at all....

How much fuel pressure? Are the injectors receiving a pulse?

fuel pressure is at 62, we think it may be the throttle position sensor- got a code for it

Are the injectors receiving a pulse?

They are receiving pulse. CHecked fuel pressure with a fuel pressure guage- we have fuel pressure, sending unit is working, spraying ether under the hood does not allow the engine to start even for a second. The throttle position sensor was not the problem- that was the only thing that came up on the computer. All fuses are ok. 6 mechanics are stumped, And in the meantime I have had no vehicle for 15 days.....

What is the compression?

I don't know, the truck belongs to me, I am relaying what my mechanic is telling me but Ron is not here right now. Are you talking about the compression with the injectors? Like I might need to rebuild the motor??

Compression of the cylinders.

He has not done that, but my truck has not been riding rough at all. Engine is quiet, accelerates smoothly, no bucking, no skipping, nothing that I have noticed at all. The only thing is the serpentine belt makes noise if it is wet, all the pulleys have been changed and the belt is the shorter one of the two for a suburban so it fits tightly enough- edges are not cracked or frayed. I have never sprayed anything on it, either...

Something is being overlooked, air and fuel in the correct mixture is compressed then ignited. Then your engine will run. What is the fuel pressure?

62

This is so frustrating and everyone is stumped. Unfortunately, I don't have unlimited funds to keep on eliminating issues after changing parts.....

Pull the spider injector out and make sure its working properly is the direction I would go in right now.

Also 62psi is high does it come down while cranking?

OK! I will tell him to do that..... thank you....

I will ask about the 62psi when he calls.....

did you check the main fuse bank on the drivers side under the hood. There is an ignition fuse under there that if it blows the entire engine shuts down.

Will it start with starter fluid?

So what is answer???

Because there was spark nobody thought it was the ignition coil, when the truck was put on the diagnostic machine, it still did not show that it could be it. The mechanic just decided to try it and that was all it was. A simple ignition coil.....