The van
has developed a running fault
that started a month or so ago and has become progressively worse. It has taken
us some time to chase down the cause of this problem.
The
symptoms:
This
suggests that it is a fuel problem. But it has nothing to do with fuel,
injectors, high pressure pump, fuel filter or related sensors. Another
suggestion was the turbo, but we could hear it spooling up. We checked the turbo pipes, ducting was tight and not
blocked. We found a couple of lose hose clips but not enough to cause power
loss. Also checked to make sure the waste gate solenoid worked as it should.
At one point
we thought the ECU needed a re-boot, again it did not seem likely. Thinking
about it, it was a flow problem the only other thing that came to mind was the
air flow meter. Before we paid out on a new meter we surfed some motoring
forums for pointers, but no one had this fault it would seem. We came across a
thread that suggested the changing of the airflow meter would sort it out, but
this gentleman also had the crank sensor replace. After a short discussion we
decided to go with the air flow meter. Bingo! got it in one and what a relief,
it would have been an expensive mistake otherwise.
Air flow meter |
Extra
work.
While we had
the air filter housing off, which is a
pig remove, we thought it prudent to check the glow plugs as it only takes a
couple of minutes with a voltmeter. We found that two of the plugs didn't
work. The ERG valve drew my attention because the inlet manifold was covered in oil suggesting the gasket had failed or
the bolts were loose. You have to be patient when removing it as it has a build-up of oil residue. On removal, it was found clogged with a thick coagulated oil that took a bit of cleaning up.
It runs and
pulls like a train now. The rice pudding skin doesn't stand a chance!
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