Vapor Lock?
Thread Starter
Advanced
Joined: Jul 2004
Posts: 87
Likes: 1
Vapor Lock?
I have all the symptoms of vapor lock on my LT1 94 coupe. If I drive for a long time (I live in Orlando, FL) and stop the car when it is hot for a short time - it won't restart. Spit and chugs like crazy but won't fire. If I let it cool down, it starts fine.
Anyone had experience with this and might suggest a solution?
Anyone had experience with this and might suggest a solution?
Race Director
Joined: Jun 2004
Posts: 13,956
Likes: 706
From: WI
Vapor lock to me is not turning over at all from gas or water. If you don't have a lot of white smoke from coolant, next would be to check the injectors for leaking. Try opening the throttle before starting to let the gas vapor out, you should be able to smell a strong gas smell in the TB if you check.
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
A vapor lock is something that doesn't happen to cars with the fuel pump in the gas tank. Try turning the key on without starting and listen for the fuel pump to run for about 3 seconds. Then continue turning the switch to start. This way you'll have fuel pressure to the injectors.
Race Director
Joined: Jun 2004
Posts: 13,956
Likes: 706
From: WI
A vapor lock is something that doesn't happen to cars with the fuel pump in the gas tank. Try turning the key on without starting and listen for the fuel pump to run for about 3 seconds. Then continue turning the switch to start. This way you'll have fuel pressure to the injectors.
Safety Car
Joined: Jul 2004
Posts: 3,837
Likes: 30
........it has the symptoms of being "flooded" out due to leakey injectors...hold pedal to floor and then crank...it should start faster although this won't do much for the after start issues...except that you plugs could be "fuel fouled"(?).......good luck......
Race Director
Joined: Feb 2003
Posts: 11,671
Likes: 20
From: Lake Wylie SC
That's not a vapor lock that is a hydraulic lock if the cylinder is full of gas. Fix the leaky injector or just replace them.
Racer
Joined: Aug 2002
Posts: 405
Likes: 0
From: hamilton ontario
bad injector
I have all the symptoms of vapor lock on my LT1 94 coupe. If I drive for a long time (I live in Orlando, FL) and stop the car when it is hot for a short time - it won't restart. Spit and chugs like crazy but won't fire. If I let it cool down, it starts fine.
Anyone had experience with this and might suggest a solution?
Anyone had experience with this and might suggest a solution?
Check your ohm reading of all injectors should all be close to each other if one is off bad injector the coil on the injector doesnt work well under heat
Le Mans Master
Joined: Dec 2000
Posts: 7,839
Likes: 22
From: San Diego, Ca
Evaporative Emission Controls and electronic fuel injection pretty much cured vapor lock. You can rule it out by clamping off the inlet hose from the Charcoal Canister. If it goes away - the problem is in that system. Either a fuel soaked canister or a check valve which should be keeping the fumes in the tank until it's started.
Corvette Stories
The Best of Corvette for Corvette Enthusiasts
Top 10 Most Explosive Corvettes Ever Made: Power-to-Weight Ratio Ranked!
Joe Kucinski
150 hp to 1,250 hp: Every Corvette Generation Compared by the Specs That Matter
Joe Kucinski
8 Coolest Corvette Pace Cars (and Replicas) of All Time
Verdad Gallardo
Top 10 Corvette Engines RANKED by Peak Torque (70+ Years of Muscle!)
Joe Kucinski
Corvette ZR1X Will Be Pacing the Indy 500, And Could Probably Race, Too!
Verdad Gallardo
Top 10 Corvettes Coming to Mecum Indy 2026!
Brett Foote
Top 10 C9 Corvette MUST-HAVES to Fix These C8 Generation Flaws!
Michael S. Palmer
10 Revolutionary 'Corvette Firsts' Most People Don't Know
Joe Kucinski