There are several signs that may indicate a bad engine:
Warning lights:
If the "Check Engine" or other warning lights on your dashboard come on and stay on, or it flickering on and off, it could be a sign of a problem with your engine. You should have stopped driving the car and tow your car to a repair shop as soon as possible.
Unusual noises:
If you hear knocking, rattling, grinding, or other unusual noises coming from your engine, it could be a sign of a serious problem. These noises could indicate issues with the internal components of the engine, such as worn bearings or a damaged piston, or low oil.
Smoke:
If you see smoke coming from your exhaust, it could be a sign of a bad engine. Black smoke could indicate a problem with the fuel system, blue smoke could mean that oil is burning in the engine, and white smoke could indicate a coolant leak or a blown head gasket.
Poor performance:
If your vehicle is struggling to accelerate or is experiencing a loss of power, it could be a sign of a problem with the engine. This could be due to a variety of issues, such as a clogged fuel filter, a malfunctioning sensor, or a damaged component.
Overheating:
If your engine is overheating or the temperature gauge on your dashboard is indicating that the engine is running hotter than normal, it could be a sign of a problem with the cooling system or the engine itself. Overheating can cause serious damage to the engine and should be addressed immediately.
These are some of the signs that indicate a car or truck with a bad engine. It is normally costly to fix . In most of these cases one should stop spend any money for repairing the vehicle and sell your vehicle to an auto wrecker or to a towing company that buy junk cars. We come to your site pay cash on the spot for your vehicle and tow it away for recycling.