If vacuum hose to EGR is ok, then valve may need to be replaced, or passages cleaned out.
All header pipes that comes out of the engine on four strokes will glow in low light from the heat. Its normal
The ASR dash light is a brake assist system/acceleration slip regulation light. When this light comes on in the Isuzu NPR truck, the on board computer in the vehicle detected a malfunction in the acceleration slip regulation and the vehicle needs to be taken for service.
to rich of a gas mixture
Your in a high condensation area and it has collected in your exhaust system and causes old mufflers and exhaust system to rust.
When a weird noise comes from the exhaust after stepping on the gas pedal, it could mean that there is a hole in the exhaust pipe. Sometimes the exhaust pipe will rust and need to be replaced.
what to do when the malfuction light comes on?
what does it mean when light comes on
it means when the maintenance light is on
It means your engine needs attention.
Exhaust gas recirculation insufficient flow detected
its mean that
Luke comes from the Latin name, meaning "Light".