mountainmanjoe

can you describe in more detail "won't start"? Paying close attention to what the engine is trying to tell you is key to diagnosis.

apate1231

when I first turn the key and the first time it turns over it almost starts and sputters. Then after that it just turns over and over and over sounding like it isn’t even trying to start. It’s just like if you had a bad fuel pump. But it’s getting around 50 psi at the rail.

apate1231

One thing I did notice last night is that when I have the key on run and turn the key like I’m going to start it, but don’t turn it enough to turn over I hear a click towards the back of the van, I haven’t been able to figure out what’s clicking as I don’t have someone to turn the key for me

apate1231

Also I can not attach the video, but when I tested my fuel pressure when I turn my key on the psi goes up to around 60 psi, then once I start turning the key and it doesn’t start And I’m still cranking it, it quickly drops to around 45 psi and doesn’t build up unless I release the pressure from the schrader valve. Then it will start almost everytime

mountainmanjoe

dunno about the click. Could be the fuel pump priming but more likely the starter solenoid. I think you'll have better luck getting a helper to locate that than internet people.

Did you test the plugs? Like pull them out one at a time, crank and observe an actual spark?
If you are getting proper fuel delivery, then the plugs should be wet after unsuccessful cranking like that.

apate1231

To me after typing it all out and reading it I almost feel like I need to run a compression test. The way the fuel pressure drops like that is weird. Maybe one of my injectors sticks open when I’m turning it over? Because if I have pressure in the line and let it sit it holds it just fine

apate1231

yes I did check the plugs, I had a weak spark so I did a full tune up and checked that they had a good spark. I can’t today but tomorrow I will turn it over and check to see if they are getting fuel to them

mountainmanjoe

Can't hurt. But I think the engine would have to be pretty worn to cause it to not start at all.

It's easy to pressurize a closed fuel system that's not running. It's like blowing into a straw that you're pinching off. Maybe the pump can't keep up once the fuel starts flowing. Pressure dropping would confirm that.

apate1231

Ok guys my dad changed the fuel pump before I got it, so I was thinking it could have some kind of issue with the connection and getting low volts causing low pressure because he’s not that good at wiring things, he installed a Delphi FA10003 wiring connector, and I might be dumb but I can’t seem to figure out how to unplug it

Jim74656

I am guessing the connector looks like the one pictured? if so, pop red tab (slides) then press the clip and gently pull and the connector should come out/off