Tube laying under car!!!!!
Race Director
Joined: Mar 2016
Posts: 14,423
Likes: 8,231
From: Napa Valley California
If that’s a spring inside the rubber hose, then it’s probably the hose that connects to the overflow tube on the fuel tank seal between the fuel tank and the rear deck.
If it’s not a spring, then I have no idea!
If it’s not a spring, then I have no idea!
Race Director
Joined: Mar 2016
Posts: 14,423
Likes: 8,231
From: Napa Valley California
Could be a hose to the vacuum canister that was either removed by a prior owner and left behind or that just broke off recently and fell out.
It could also be any number of vacuum hoses connected to the engine, headlights or many other things.
If everything is working as it should and you haven’t developed any recent vacuum leaks, it’s probably been sitting somewhere for years and just dropped to the ground.
It could also be any number of vacuum hoses connected to the engine, headlights or many other things.
If everything is working as it should and you haven’t developed any recent vacuum leaks, it’s probably been sitting somewhere for years and just dropped to the ground.
Race Director
Joined: Nov 2006
Posts: 13,282
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From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Where under the car could be a clue. Front? rear? Left? right?
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Michael S. Palmer
Just another Corvette guy
Joined: Feb 1999
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From: Palm Springs, CA.
Glad I didn't bet any money on this then! 
That is your EGR TVS switch. They're available:
https://www.ebay.com/itm/19481438551...3ABFBMnJKmgf1g
Shop around, you might find a better deal.
That is your EGR TVS switch. They're available:
https://www.ebay.com/itm/19481438551...3ABFBMnJKmgf1g
Shop around, you might find a better deal.
Safety Car
Joined: Oct 2007
Posts: 4,383
Likes: 1,755
From: Seattle Area Washington
Good chances the numbers will be 364788...
That switch changes state at or around 120*
You will most likely never find another metal switch but here is a NOS TVS switch with correct part number and free shipping...
https://www.ebay.com/itm/37422940149...Bk9SR_D2mJP9YA
If you need one sooner most of the major auto parts stores can get you a Standard #PVS71 replacement switch...
Race Director
Joined: Nov 2006
Posts: 13,282
Likes: 7,862
From: Sunshine Coast, Queensland, Australia
2025 C3 of the Year Finalist - Modified
2024 C3 of the Year Finalist- Modified
2022 C3 of the Year Finalist - Modified
Cruise-In VIII Veteran
Or you could just delete all that EGR garbage completely.
Safety Car
Joined: Oct 2007
Posts: 4,383
Likes: 1,755
From: Seattle Area Washington
With the switch port broken like it is, you will also have a vacuum leak at temperatures at or around 120* in the off-idle through wide open throttle positions.
That TVS switch should be connected to a ported vacuum signal of the carburetor throttle plate.
That TVS switch should be connected to a ported vacuum signal of the carburetor throttle plate.