New answers tagged diesel
"Juddering" is as good a description as any of how a diesel runs when not all cylinders are firing. Gray smoke from the exhaust is unburned fuel (i.e., it has been injected into a cylinder, mixed with air, but not burnt). If your Golf is new enough to have a catalyst (many VW diesels are), then unburned fuel in the exhaust will quickly damage it, so you ...
Couple things you might want to check. Coolant temperature sensor. With a cold engine the ecu should try to dump more fuel in for starting. If the sensor isn't working it might send the wrong amount of fuel and inhibit starting. Idle Air Control valve. This going bad could cause similar issues.
When you replace a diesel filter, the air should be removed by using feed pump. If you don't apply the pump until the filter is full, the system will suffer with air.
Top 50 recent answers are included