No fuel but priming

[jbourque460]

OK where to begin. I have a 1995 Chevy Silverado C 1500. Started getting bad gas mileage and I noticed I didn’t have much power so I decided I was gonna advance the timing and change my spark plugs and wires. I had one of my friends change my spark plugs, but forgot to plug in the coolant temperature sensor.. I’ll get back to this. When I was at work, I started to take it off my distributor cap, but I was kind of in a rush, so I hurried up and slam it back down because I couldn’t find the socket that was needed. Well, as I’m going across Texas bridge into Louisiana my truck starts acting like it’s running out of gas and my needle was pretty low but managed to get about a mile down the road parking lot cut off my truck. After that every time I crank it it would idle I press the gas. It would rev high and low and then shut off it did this three times I got out to see what was going on and I noticed the coolant temperature sensor plug was burnt. I went ahead and change the plug, and I noticed that my “air sensor” on my tbi Had some cracks in the plug also. My map sensor plug is also cracked. I haven’t changed those because of work. I bought a new fuel pump and I finally got it to prime but no gas gets to my injectors. I even pull the lines off the plug itself and it would prime but still no fuel came out and it just cranks with no start.. change all the plugs tomorrow, but I’m still stumped how it’s priming but it’s not getting down those lines. Please help I’m stumped.

 

[Schurkey]

1995 Chevy Silverado C 1500.

WHAT ENGINE?

I had one of my friends change my spark plugs, but forgot to plug in the coolant temperature sensor.

Why was the coolant temp sensor disconnected to change plugs?

Or do you mean the temp sending unit for the dash gauge? That sending unit has NOTHING to do with how the engine runs.

I started to take it off my distributor cap, but I was kind of in a rush, so I hurried up and slam it back down because I couldn’t find the socket that was needed.

Not a good plan.

I noticed that my “air sensor” on my tbi Had some cracks in the plug also.

There is no "air sensor" on the TBI. Post a photo of the sensor you're talking about? In-focus, nicely-cropped, please.

Do you mean the Idle Air Control valve? That's not a "sensor".

My map sensor plug is also cracked. I haven’t changed those because of work.

That'll be important.

I bought a new fuel pump and I finally got it to prime but no gas gets to my injectors. I even pull the lines off the plug itself

WHAT "plug"?

You're saying that when the pump is running, no fuel is delivered to the throttle body assembly, even when you disconnect the fuel supply plumbing?

HOW OLD IS THE FUEL FILTER?

change all the plugs tomorrow,

WHICH "plugs" I thought you already changed the spark plugs. Do you mean the electrical connectors at the various sensors?

but I’m still stumped how it’s priming but it’s not getting down those lines. Please help I’m stumped.

Again...is the fuel filter plugged?

Is the gas tank empty?

 

[jbourque460]

It was iac (air idle control valve.). The plug was in pieces. I had to replace the ground straps. Running at least but very lean. White smoke and gas smell. Old truck but it lost a lot of power lately. Fuel mileage sucks.

 

[wezmykat]

HOW OLD IS THE FUEL FILTER?

My thoughts exactly.

"started getting bad gas mileage" + "priming but it’s not getting down those lines"

Well, sounds like a fuel delivery problem, my guess is that pump is sending fuel and it's getting clogged somewhere.
I remember when I changed my fuel filter, I turned it up side down? Anyway, what came out was a slimy orange mess, the filter was clogged with rust.
I ripped out all the metal fuel lines and replaced it all with rubber hose (except for a tiny bit that screws onto the filter so I could get the hose on to that) and replaced the filter and pump, flows good now.

 

[Schurkey]

Replacing tubing with hose is a generally-bad idea.

Hose has a shorter service life, easier to damage, is more-permeable, and often costs more.

 

[GoToGuy]

How do you prime but have no fuel at throttle body?
You rush and shortcut it's bites you in the ass every time.