When the engine is hot, fuel can vaporize in the fuel lines, forming bubbles that block the flow of fuel to the engine. Vapor lock is most common in older vehicles with carburetors, but it can also occur in fuel-injected vehicles.
Fuel starvation:
When the fuel pump is unable to deliver enough fuel to the engine, it can cause the car to stall. This can be caused by a clogged fuel filter, a faulty fuel pump, or a leak in the fuel line. When an engine compartment overheats, it can cause the pump to lose pressure or shut off entirely, leading to fuel starvation.
Electrical issues:
Heat can affect electrical components in your vehicle, including sensors and wiring. Faulty sensors can provide incorrect information to the engine's computer, causing it to run poorly or stall. Similarly, damaged or loose wiring can disrupt electrical signals, affecting various components and potentially leading to stalling.
Engine overheating:
When an engine overheats, it can cause various components to malfunction, including the ignition system and fuel injection system. This can lead to misfires, reduced engine power, and eventually stalling. Overheating can also warp engine components, leading to further problems and potential stalling.
Mechanical problems:
Heat can exacerbate existing mechanical problems or cause new ones. Worn-out engine components, such as piston rings or bearings, can become even less effective when the engine is hot, leading to reduced compression and potential stalling. Additionally, heat-related expansion can affect clearances and tolerances, causing increased friction and the engine to seize.
Sensor malfunctions:
Temperature sensors, oxygen sensors, and other sensors can provide incorrect readings due to excessive heat. This can confuse the engine's computer and lead to improper fuel mixture, ignition timing, or other issues that can cause stalling.
