Puzzling
Voyager
The vehicle is a 1995 Plymouth Voyager, with a 2.5L engine three-speed automatic transmission, VIN 2P4GH25K2SR311768. The vehicle is hard to start and it will not idle without going to a rich condition. At high rpms, all readings on the sensors are good.
Let’s see what we can do with the limited information that we have. The complaint is hard starting, rough idle and a rich idle condition. The O2 sensor displays rich, and the injector pulse width is abnormally high for idle speeds. You state that all sensor readings are good when above idle, and fuel pressure is within specifications.
Dear Troubleshooter:
I’m working on a Toyota Celica GT, production date 10/90 with a 16 valve 2200 engine and automatic transmission (VIN JT2ST87N6M0070522). The problem happens when the car is warm. After being on the highway, the engine stumbles and stalls while sitting at a stop, but not all the time. The owner has taken it to the dealer several times, and they say there’s no problem. But there is because it happened to me, so I know what she is complaining about.
Let’s see what we can do. Because the problem exists only during idle, we must concentrate on anything that can have a major affect on idle without affecting operation at higher speeds. This would include such areas as vacuum leaks, open EGR, a malfunctioning or ‘sludged-up’ idle air control system, and engine mechanical failures, such as a sticking valve.
The vehicle is a 1995 Plymouth Voyager, with a 2.5L engine three-speed automatic transmission, VIN 2P4GH25K2SR311768. The vehicle is hard to start and it will not idle without going to a rich condition. At high rpms, all readings on the sensors are good.
Let’s see what we can do with the limited information that we have. The complaint is hard starting, rough idle and a rich idle condition. The O2 sensor displays rich, and the injector pulse width is abnormally high for idle speeds. You state that all sensor readings are good when above idle, and fuel pressure is within specifications.
Dear Troubleshooter:
I’m working on a Toyota Celica GT, production date 10/90 with a 16 valve 2200 engine and automatic transmission (VIN JT2ST87N6M0070522). The problem happens when the car is warm. After being on the highway, the engine stumbles and stalls while sitting at a stop, but not all the time. The owner has taken it to the dealer several times, and they say there’s no problem. But there is because it happened to me, so I know what she is complaining about.
Let’s see what we can do. Because the problem exists only during idle, we must concentrate on anything that can have a major affect on idle without affecting operation at higher speeds. This would include such areas as vacuum leaks, open EGR, a malfunctioning or ‘sludged-up’ idle air control system, and engine mechanical failures, such as a sticking valve.
