A closed loop control system for regulation of engine air-fuel ratio at the stoichiometric value is required for effective operation of a three-way catalytic converter. System performance depends ...

Dear Doctor: I own a 2005 Ford Freestar that I purchased with 11,000 miles, and it has always run fine. I recently took it on a 700-mile trip. At highway speeds the engine developed an engine ping. I ...

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 ...

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 ...

When Ford (in conjunction with International) converted the 7.3L IDI engine from mechanical to the hydraulically actuated electronically controlled unit injection (HEUI) system, the Power Stroke brand ...

The new Euro 6 car emissions standards coming into force in September will require at least 20 sensors per auto engine, says IHS. Most of the new sensors are related to exhaust aftertreatment because ...

Hello Paul, lately, my Nissan Trail emits a lot of heat from the engine bay area and can be felt by a bystander yet the temperature gauge is normal. What could be the cause? Charles Hello Charles, ...

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.