Ruff Idle ,Huge Loss of Power

[Tripler]

I am seeing and smelling gas inside this 90 elbow . Obviously the car is flooding . Tried looking under the plenum with the scope but that's useless as I have no idea what I would be looking for

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[Tripler]

Is there supposed to be something attached to this brass spigot ? I don't ever remember seeing anything attached before . The tube you see is the scope as I used it's lights to highlight the spigot


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[Ccmano]

Is that elbow in the vacuum line to the fuel pressure regulator? If there’s gas there the fuel pressure regulator has failed, could be the source of you problem.

The “spigot” you refer to (if I interpreted you post correctly) is the vent for the vacuum solenoid. No lines attach there.
H

[Ccmano]

If you have a hand held vacuum pump attach it to the fuel regulator and pump it up to no more than 10 psi. If the vacuum doesn’t hold the regulator is bad.
H

[Paul Workman]

Originally Posted by Tripler

How would I check fuel pressure ? Do I need to attach a gauge somewhere along the fuel line ?



Thanks



Mike

There is a Schrader valve at the front of the passenger side fuel rail. Attach a pressure gauge there for static pressure tests, (AND (FYI) if you purchase an extension hose, you can do impromptu dynamic tests by taping the pressure gauge to the windshield and going for a drive (not necessarily applicable to this particular problem))

[Paul Workman]

Originally Posted by Ccmano

Is that elbow in the vacuum line to the fuel pressure regulator? If there’s gas there the fuel pressure regulator has failed, could be the source of you problem.

The “spigot” you refer to (if I interpreted you post correctly) is the vent for the vacuum solenoid. No lines attach there.
H

[Tripler]

Originally Posted by Paul Workman

There is a Schrader valve at the front of the passenger side fuel rail. Attach a pressure gauge there for static pressure tests, (AND (FYI) if you purchase an extension hose, you can do impromptu dynamic tests by taping the pressure gauge to the windshield and going for a drive (not necessarily applicable to this particular problem))

So 200 mph tape then [emoji39]

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[Ccmano]

If the fuel pressure regulator is bad, with raw fuel being pulled into the plenum from a ruptured membrane, checking the fuel pressure is largely irrelevant. Assuming the fuel pumps are good you will simply see maximum pressure ~50psi.
H

[Mystic ZR-1]

Two observations:
That‘s 10 inches of Hg, vacuum, not 10 psi pressure...
100 mph tape should do the job, 200 mph rating not required...
😋

[Tripler]

So from what I am reading and from what you guys are saying , the fuel pressure regulator is toast . Any idea where I purchase a new one and also how difficult are they to change out .



Is this the right one ?
https://www.ebay.com/itm/Fuel-Inject...oAAOSwxMRbnQfo


Also reading Dynomites blog .
https://www.corvetteforum.com/forums...post1596384563



Thanks



Mike