91 Vette Vapor Lock Problem
Drifting
Joined: Aug 2002
Posts: 1,775
Likes: 125
From: Birmingham AL
More details? Having difficulty with understanding how a pressurized injection system would have vapor lock. This could be an issue with carburetors and 3-5 psi, but 30+ psi? More details will help diagnose.
Team Owner
Joined: May 2000
Posts: 53,810
Likes: 5,635
From: Plantation Florida USAF(Retired) 1966-1990
U.S. Air Force
St. Jude Donor '05 thru '26
NCM Sinkhole Donor
I didn't know cars with fuel injection can get vapor lock, be more specific with concern.
I have 1989 for 23 years, what I had was bad injector creating a headache!
I have 1989 for 23 years, what I had was bad injector creating a headache!
Thread Starter
Heel & Toe
Joined: Jul 2012
Posts: 19
Likes: 0
Vapor Lock Problem
I agree that vapor lock does not seem possible with a pressurized fuel injection system. But here are the symptoms: Turning the car off at the gas pump makes it hard to start. It will finally start if I press the accelerator to the floor and it then acts as if it is flooded. Traveling down the road it will start to miss and then finally die. Again, pressing the accelerator to the floor will allow it to restart with the same noted flooding results. The engine always starts and runs fine when it is cold. .
Zen Vet Master Level VII
Joined: Mar 2016
Posts: 5,218
Likes: 1,174
From: Southlake, TX
I agree that vapor lock does not seem possible with a pressurized fuel injection system. But here are the symptoms: Turning the car off at the gas pump makes it hard to start. It will finally start if I press the accelerator to the floor and it then acts as if it is flooded. Traveling down the road it will start to miss and then finally die. Again, pressing the accelerator to the floor will allow it to restart with the same noted flooding results. The engine always starts and runs fine when it is cold. .
Thread Starter
Heel & Toe
Joined: Jul 2012
Posts: 19
Likes: 0
Vapor Lock Problem?
Bill, thanks for the reply. I have checked the fuel pressure at idle. It is 55-60 psi, but I have not checked it at WOT. The fuel pump was replaced last year and has not shown any problems to date. I am still wondering why the problem only appears after the engine reaches operating temperature.
