06-27-2019 | #21 |
Join Date: Apr 2013
Location: Toronto
Posts: 716
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Re: Ruff Idle ,Huge Loss of Power
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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06-27-2019 | #22 |
Join Date: Apr 2013
Location: Toronto
Posts: 716
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Re: Ruff Idle ,Huge Loss of Power
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
Sent from my ASUS_X00PD using Tapatalk Last edited by Tripler; 07-17-2019 at 10:53 AM. |
06-27-2019 | #23 |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Ruff Idle ,Huge Loss of Power
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
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
06-27-2019 | #24 |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Ruff Idle ,Huge Loss of Power
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
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90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
06-27-2019 | #25 |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Ruff Idle ,Huge Loss of Power
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))
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
06-27-2019 | #26 | |
Join Date: Nov 2007
Location: Squires (near Ava MO in the Mark Twain N'tl Forest) - Missouri
Posts: 6,493
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Re: Ruff Idle ,Huge Loss of Power
Quote:
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Good carz, good food, good friendz = the best of timez! 90 #1202 "FBI" top end ported & relieved Cam timing by "Pete the Greek" Sans secondaries Chip & dyno tuning by Haibeck Automotive SW headers, X-pipe, MF muffs Former Secretary, ZR-1 Net Registry |
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06-27-2019 | #27 | |
Join Date: Apr 2013
Location: Toronto
Posts: 716
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Re: Ruff Idle ,Huge Loss of Power
Quote:
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06-27-2019 | #28 |
Join Date: Jun 2006
Location: Sparks, NV
Posts: 2,852
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Re: Ruff Idle ,Huge Loss of Power
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
__________________
90'ZR-1 #1461 Red/Black Ported Intake, Degreed Cams, OBX Headers & Exhaust, Fidanza FW, Secondary Delete, Custom tune, C6 GS Wheels. Sold 08 C6 Z51 Crystal Red Metallic Sold Vararam Intake, Tune, Sold 05 C6 Z51 Red/Black Sold 90'ZR-1 #1723 Black/Gray Sold but not forgotten 91' Z51 L98 White Vert. My First, you always remember your first. Sold. |
06-27-2019 | #29 |
Join Date: Jan 2010
Location: Mystic CT
Posts: 2,626
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Re: Ruff Idle ,Huge Loss of Power
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... 😋 |
06-27-2019 | #30 |
Join Date: Apr 2013
Location: Toronto
Posts: 716
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Re: Ruff Idle ,Huge Loss of Power
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 Last edited by Tripler; 06-28-2019 at 08:10 AM. |
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