Q: My 1999 Pontiac Sunfire coupe is doing something something I can't easily explain. The car has 240,000 km on it and it has the stock engine, although I think I bought it with a K filter charger.

Faced with tough new requirements for vehicle emissions, IMI Vision developed a new system (IMI Vision UDS System) to increase the efficiency of large diesel engines. IMI’s approach to this issue was ...

It's easy to assume overheating is a result of long road trips or summer heatwaves, but when your engine gets too hot while idling, it's usually a sign of something deeper that needs immediate ...

When I hold the throttle all the way open, the engine starts, but will not run smoothly. After two or three starts, it runs normally, but the warning stays on. If I ...

Direct-port electronic fuel-injection may be the ultimate fuel metering system, but unfortunately it is also by far the most expensive. Presently available systems are based on factory electronic fuel ...

First thoughts are that the stepper-motor (which controls the idle speed) is faulty. That would explain both the high idle at low engine temps and the stalling and stumbling as you roll to a stop.