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Common Rail Diesel Problems

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Common Rail Diesel Problems –
Run Your Car Economically

What is ‘common-rail’ diesel?
common rail injectors
For those of my readers not familiar with diesel, modern common-rail powered diesel cars made their appearance around year 2000 (Peugeot Hdi a little earlier).

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Is my car a common rail diesel car?
If there are electric wires going to all 4 (or 6) injectors then Yes

If your car is called CDTi, TDCi, HDi, dCi or something similar then Yes.

Most diesel cars (not so much vans and pick-ups) newer than year 2000 will have a common rail system.

When your common rail diesel car is running fine you will be happy even if you are blissfully unaware of just how technically sophisticated it is.

It runs so smooth, non of the rough vibrations you got with your old diesel car and I can’t help being impressed how far mine will go on a tank of fuel.

In addition to these the common rail diesel car is welcome in low pollution zones and gets a lovely tax break from the government for being much cleaner than it’s old rotary diesel ancestor.

So how are the new common rail diesels different from the older system? The most important difference is higher operating pressure in the common rail means that the fuel is burnt more efficiently so it’s cleaner and goes further.

And it’s got more performance.
The possible downside of this higher pressure and better performance is greater sensitivity.

Common rail systems don’t have a high tolerance to dirt or water contamination.

And because they’re running at such high pressure injectors may need to be replaced a little sooner than the rotary type.

What are the jobs you can do yourself and save money?
The best advice is to follow regular servicing and to pay particular attention to the air and the fuel filters.

The fuel filter needs regular replacement because diesel is not completely clean even when it comes out at the filling station.

Equally important is the air filter to reduce those microscopic particles of dirt entering the engine in the air and causing early wear.

Be sure to check the service manual for additional filters sometimes built into the engine or rocker cover (e.g. on BMW diesels)

Like many things its surprising how much information is available on the net.

If you need expert help with things like injectors, sensors or regulators there are many good independent diesel shops who will save you cash compared to main motor companies.

Space here is limited; just follow my links for more tips and information.

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