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Old 06-08-14, 06:57 PM   #1
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Default Peugeot 406 HDi 110 X reg

Hi all,

I have a Peugeot 406 HDi 110, 2000.

Been running fine until yesterday, no power when pulling off from an island,
anyway car still got up to speed just took a little longer, although it held 70mph no problem on the motorway,
Ive noticed there is no pressure in the turbo/intercooler pipes.
I have used a code reader on the car, no fault codes have been displayed.
Wonder if anyone has had the same or similar problem, and could help with a bit of advice.


Last edited by Cooper.Cliff; 06-08-14 at 06:59 PM.
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Old 06-08-14, 11:31 PM   #2
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Check the following;

Intercooler hoses ( bottom and top ) for splits - even tiny ones, and trickles of oil.

Intercooler - the bottom part sometimes leaks, you may see air bubbles on the lip just above where the bottom hose goes in.

Turbo electrovalve ( the one on the left side looking at the bank of 3 on the bulkhead ) as the waste gate may be stuck open.

Splits in the vacuum pipework, a split means no vacuum to open/close the waste gate.

Has the power returned?
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Old 07-08-14, 07:52 AM   #3
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Hi no power yet,

Had a P0243 code pop up last night, (Wastegate solenoid A)
Took the top intercooler hose off and the Wastegate is indeed open, so have ordered a new solenoid and will be re-fitting asap, will let you know how it goes
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Old 07-08-14, 05:09 PM   #4
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Switched the valves around today to see if it made a difference and it didn't
Still got no pressure in the turbo system,
No leaks in any pipes, or intercooler,

Anything i could have missed?
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Old 07-08-14, 09:34 PM   #5
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Is there any chance the vacuum pump could have gone?
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Old 07-08-14, 11:40 PM   #6
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If the vacuum pump goes then you will lose your brake servo too.

You say you looked at the wastegate inside the top intercooler pipe, but I think that is just an air doser, the wastegate is somewhere else ( I may be wrong as your layout is different to mine )

Try again when the new solenoid/electrovalve arrives - it is showing as faulty and it may be just that that is causing the problem.
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Old 08-08-14, 09:13 AM   #7
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It was the doser, gonna wait for the parts to arrive, and hope it does the job, got a hol in a week, not sure driving 200+ miles is a good idea.
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Old 11-08-14, 07:31 PM   #8
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Ok its sorted,

Turns out the vacuum hose under the Brake servo had a major split, couldn't here the air release because it was on the joint. Luckily I had some spare hose left from a project, fitted it and my Turbo came alive
Gave it a rev and had a massive a mount of black smoke, but after a good run its cleared and running sweet as a nut, just a service left to do now.
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Old 11-08-14, 08:13 PM   #9
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That is a good result, will you still fit the replacement electrovalve or keep it as a spare?
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Old 11-08-14, 08:18 PM   #10
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vac pipes a common issue with all hdis as they get older low boost garages always blame turbos but 70% of the time its just a vac issue

My son was complaining of lack off boost on his and I cured it in 5 mins pipe split from vac pump to solenoids people should always check this first.
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