Replaced entire fuel system from the filter back. Now no start.

[shift5]

Opened the lines at both sides of the filter and at the high side of the throttle body and got fuel spray in all 3 places.

 

[PlayingWithTBI]

Take a timing light, or even a flashlight, and shine it towards the back of the throttle body's venturi. See if you're getting a good even cone (no drips) spraying out of the injectors while cranking. If not, start looking at your pressure side inlet and regulator.

 

[shift5]

Which side of the throttle body is the pressure side and which is the return? I think i already pulled the pressure side off.

 

[PlayingWithTBI]

Pressure side is the larger size hose and fitting on the right, looking at it from behind. Here's a picture you can go by.

https://www.ebay.com/itm/GM-TBI-6AN...507749?hash=item3643401765:g:a1sAAOSwdhdcGoC6

 

[shift5]

So passenger side?

 

[PlayingWithTBI]

I went and looked at my old TB from my 88 and the bigger fitting is on the driver's side but the picture I posted, it's on the passenger side. So, I guess it could be on either side. IIRC the pressure line is 3/8" and the return is 5/16"

 

[shift5]

Confirmed it runs on starter fluid for a couple seconds and dies.

 

[PlayingWithTBI]

Need a pressure gauge. Did you shine a flashlight down the throat behind the injectors? See any spray?

 

[shift5]

Yep, ordered a pressure gauge. Be here next week.

Haven't shined a flashlight down the throat yet. I'll get the woman to crank while i watch tonight maybe. Fairly obvious they're not firing though.

If i'm a betting man I'd say I have some fuel pressure but not enough to fire the injectors.

 

[shift5]

Well, pressure gauge arrived.

No fuel pressure.

But there's fuel in the lines, and I can hear it running.

So that means eitehr there's a line blockage somewhere, I've got a bad pump, or the pump is running backwards, right? But if it was running backwards with only 1/8 tank I wouldn't likely have any fuel in the lines right? Or would I?