Problem on the 'limp' home yesterday.

[stutaeng]

Yes. I helped my nephew diagnose his 4.3 Vortec. The fuel trims were wild, truck acted like it was going to stall, and had no power.

After shutting it off and hooking up a fuel pressure gauge we discovered pressure dropped to nothing in a few seconds.

Same issues you have.

He did the repair, but said he saw the same thing. The regulator dumps fuel into the nearest cylinder (s) and screws things up.

 

[Keeper]

in my case, I could not resist the temptation to replace that lower intake gasket if I was in that far

 

[Lou Merrell]

in my case, I could not resist the temptation to replace that lower intake gasket if I was in that far

Did a smoke test, no leaks.
I'll do the gaskets next summer unless I have to. "If it ain't broke, don't fix it." Continuing to resist......hoping I don't regret not doing it.....

 

[Supercharged111]

So. . . it's fixed?

 

[Lou Merrell]

So. . . it's fixed?

Not yet. Waiting on injector unit. Delivery on the 7th.

 

[Supercharged111]

Not yet. Waiting on injector unit. Delivery on the 7th.

Ahh, when you said you did a smoke test I couldn't tell if you were repeating yourself or saying you'd done another post-injector replacement.

 

[Lou Merrell]

How should I go about cleaning the injector ports so I don't shove grime in the tips of the new injectors when I put the in. I've already vacuumed them with the shop vac. I used Castrol super clean on the non-functioning surfaces and I'm using throttle body and air intake cleaner on the passageways.
I do have my gun cleaning kit that would work perfectly but I'm apprehensive about shoving crap behind my valves also.
Should I be that concerned about it or am I being overly cautious?

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[Supercharged111]

Easies way would be to remove it. . .

 

[Lou Merrell]

Right.
What about an uneasy way?

 

[Lou Merrell]

Got it, just came to me.
Seal an adapter over intake runner connected to shop vac. Anything that would fall will follow the air flow and be sucked into shop vac.