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Originally Posted by Viraat13 That is the reason why it is recommended to keep cranking the engine for up to a minute as there is self bleeding system in place. Right?
OFF TOPIC — I figured out a way to improvise a dash mounted camera for those videos that you wanted. I shall have something by the weekend! |
Self-bleeding can be understood to mean that the fuel pump can theoretcially manage to drag fuel from the tank through the lines, fill the filter(s), the injector pump and then the lines. Not easy to do, and very hard work on the starter motor. I think the term 'self-priming' would be used if this were the intention.
I understand it to mean that any air in the pump and lines should be purged out as the engine runs, instead of recycling the air round and round.
To prime the system which has had an air ingress, either attach a inline 'bulb' from another sort of diesel car or use a vacuum-operated fuel priming tool. Best to avoid it althogether, but when you replace fuel lines this isn't possible.
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Originally Posted by V-16 An EGR (Exhaust Gas Recycling) Valve is there for a purpose. It is a link between the exhaust manifolds and opens in certain conditions. Uneven idling can be a symptom. In most cases in India, EGR valves were either not available or were expensive hence they were bypassed. That would leave to uneven idling, black smoke from the exhaust and also dropped pick up. I would suggest getting one and fixing it immediately. For that go to a proper mevchanic, not someone who says its ok of the valve is disconnected. |
This is a rare situation of altering the way the car was built to good effect. I rarely suggest 'improving' on a manufacturer's setup, especially when it is a quality manufacturer, but EGRs are there for emission purposes when the car is new, not to make them run better. They recycle exhaust gas at small throttle openings to reduce NOx at the tailpipe and on later engines act as a tool to heat up the engine more quickly from a cold start.
They are prone to causing many (and manifold) problems, causing a build-up of a thick, caked oily substance in the inlet tracts as time goes by. The EGR valve itself can often get stuck, compounding the problem and making for more exhaust gas pollution. You either dismantle and clean/replace the upper bits of your engine and fit a new EGR then wait for the same thing to happen, or delete/blank it.
Euro3 engines (EGRsa with no electrical connection) are pre-2005 and there is no warning light to advise of the blanked EGR, Euro4 which is 2005 and on need a quick ECU remap to tell the management not to expect it to be operational.
Having an engine
not sucking in oily hot air is a good thing, the chance of
damage occurs if one is left on as the years and mileage pile on.
Think of it as your engine giving up tobacco, with nicotine patches needed for the latest engines breathing clean air.