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How do I fix vapor lock on a car?
My car has been running rough and struggling with acceleration. Recently it died in traffic. Could it be vapor lock? How do I fix vapor lock on a car?
Bonnie Stinson · Updated on
Reviewed by Shannon Martin, Licensed Insurance Agent.
Sorry to hear about your car! Vapor lock is exacerbated by hot conditions, so you should check your fuel delivery system for things could contribute to overheating.
You’re right, poor performance, surging, and stalling are signs that you might have a vapor lock problem. Of course, a faulty ignition coil could also be at fault. But ignition coil problems persist in all weather, whereas vapor lock tends to happen more frequently in warm weather.
Here are some common causes of vapor lock:
- Fuel lines or fuel pump too close to the engine
- Restricted fuel filter
- Clogged fuel return system
- Faulty fuel tank vent
Ethanol-enhanced gasoline and high temperatures can aggravate this problem.
Before you try to fix the vapor lock, start by checking that the fuel pump and fuel lines are not too close. Then, clear restrictions from the fuel pump, fuel filter, and return line.
Now, the general strategy behind fixing vapor lock is to reduce overheating. Here are a few ways to lower the temperature of your fuel system:
- Install heat shields to the fuel lines, pump, and carburetor using insulating tubing or metal plates
- Install fuel injector wrappers to reflect heat
- Install a spacer blocker or carburetor heat insulator
- Install an electric fuel pump near fuel tank with vapor discharge valve (requires a return line)
- Replace the old cooling fan with a modern electrical cooling fan
Hope your car gets back to its old self soon!
If you have any questions about
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