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Rattle under load
Posted: Sun Aug 09, 2009 12:35 pm
by BruceT
We thought it may have been the water pump, or timing or crankshaft pulley.
Pug specialist fitted a new timing belt kit, new water pump and said the crankshaft pulley is ok and just "tighened" it.
So, why is there still a rattle when accelerating?
Whats weird is it stops at 3000-3200rpm.
Any idea's?
Re: Rattle under load
Posted: Sun Aug 09, 2009 12:38 pm
by steve_earwig
3,200. Mine does that, it's the injectors apparently.
Re: Rattle under load
Posted: Sun Aug 09, 2009 1:25 pm
by BruceT
OH right... weird...
Re: Rattle under load
Posted: Mon Aug 10, 2009 1:03 pm
by Doggy
My previous Xsara HDi 90 did it too - I'm sure it's not a fault. Did it for the 100,000 miles I drove it without problems.
Doggy's theory is it abandons pre & post injection in favour of emulating a mechanical injection system when under full load.
(Can't explain why it smoothes out at 3000, but then I'm not French)
FWIW the 136 doesn't do it, or if it does, the noise gets drowned out by the ecu dumping all the 'excess' boost
Re: Rattle under load
Posted: Mon Aug 10, 2009 1:22 pm
by BruceT
Ah, aslong as its nothing important breaking its all good.
Re: Rattle under load
Posted: Mon Aug 10, 2009 3:48 pm
by steve_earwig
dogslife wrote:(Can't explain why it smoothes out at 3000, but then I'm not French)
German? The ecu turns on the third piston in the HP pump at 3,200 rpm.
Re: Rattle under load
Posted: Mon Aug 10, 2009 4:25 pm
by BruceT
Ah... 3rd Piston on the high pressure pump?
Interesting...
Re: Rattle under load
Posted: Mon Aug 10, 2009 5:01 pm
by steve_earwig
Not really, more moving parts - more to go wrong
