Intermittent hard starting 2000 5.0.

[Turdle]

Car-part dot com

They have a bunch

 

[zorac311]

Well that's wonderful. May as well replace injectors then too. I was hoping NOT to pull the intake!

 

[Mesozoic]

Injector failure isn’t that common. Not sure you need to do that.

If it comes down to it, I’d be happy to ship you my known good set for the cost shipping, but you should be able to just clean your stockers and put them back into service.

 

[410Fortune]

Junk yard! Pull the snap ring and remove the guts likely find a torn bladder
With junk yard parts can replace just the bladder and no need to remove intakes or injectors

Im assuming you found fuel in the vacuum line feeding the dampener?

 

[zorac311]

Junk yard! Pull the snap ring and remove the guts likely find a torn bladder
With junk yard parts can replace just the bladder and no need to remove intakes or injectors

Im assuming you found fuel in the vacuum line feeding the dampener?

It smelled the like fuel, didn't see it pouring out or anything. If I disconnect the vaccuum line from it, my warm hard/stalling starting issue disappears entirely.

 

[410Fortune]

Interesting!!! Have you checked fuel pressure?

 

[zorac311]

Interesting!!! Have you checked fuel pressure?

Yes, its reading like 40 vs the 60 it normally runs at. Restarts fine once cooled off. It's like the line is sucking the fuel pressure away. Then it starts and wants to die because there isn't quite enough pressure there. If you tap the gas it's fine though.

 

[410Fortune]

40
Is toooooo
Low

Spec is 62 +/- for a 2000
Your pulse damper maybe fine, there are no pulses to dampen lol
If there is no raw fuel in the vacuum line then there is likely no rip in to bladder inside the damper. All vacuum lines smell of fuel

Sounds like you need a new pump strainer and filter

The truck will run with 40psi but the injectors are no atomizing the fuel well at that psi and it will run out of talent when demand is high (like extended highway runs or passing or hills)

 

[Turdle]

I see fuel pressure diaphragms for sale, even on eBay.
I wonder if the factory spring behind new diaphragm would work.

 

[zorac311]

40
Is toooooo
Low

Spec is 62 +/- for a 2000
Your pulse damper maybe fine, there are no pulses to dampen lol
If there is no raw fuel in the vacuum line then there is likely no rip in to bladder inside the damper. All vacuum lines smell of fuel

Sounds like you need a new pump strainer and filter

The truck will run with 40psi but the injectors are no atomizing the fuel well at that psi and it will run out of talent when demand is high (like extended highway runs or passing or hills)

I installed a new delphi pump assembly, plus a new inline filter. The old pump was creating other issues that have bow been solved.

 

[zorac311]

I installed a new delphi pump assembly, plus a new inline filter. The old pump was creating other issues that have bow been solved.

When the line gets pulled off the damper, the issue is non existant. I'm going to inspect it tonight and see if it's torn!

 

[zorac311]

I installed a new delphi pump assembly, plus a new inline filter. The old pump was creating other issues that have bow been solved.

There is definitely fuel going through there! Just pulled the vacuum line and gas squirted through the top! Pulling it apart tomorrow hopefully

 

[410Fortune]

40 psi is still too low even if the pump is new

Try a different gauge/ tester? Should be 64 psi +/-

Test it after uuu fix dampener

 

[zorac311]

40 psi is still too low even if the pump is new

Try a different gauge/ tester? Should be 64 psi +/-

Test it after uuu fix dampener

Well she's fixed! It was a torn dampener! Problem solved! Thank you to everyone that helped me with suggestions!