Question about 1989 Peugeot 405

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Loss of power on hills

1999 peugeot 406hdi drives great on flat lossing power on hills heavy black smoke on hills have changed airflow meter and egr valve still the same [ there was no 406 in list so picked 405] car i have is as above 406

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  • Anonymous Jan 03, 2009

    Hi, I have a similar problem with my Audi A4 1.9 TDI (1996).
    Have had the car for over 10 years now and in the past 3-4 years, have noticed loss of power/ torque when there is any sort of gradient on a hill. The car slows right down and there is a considerable amount of black smoke from the exhaust pipe. It is to the point of embarrassment and dangerous to anyone following behind me, as they cannot see the road behind me. I love the car, and there hasn't been any other problems except for the usual wear and tear issues. Can anyone help me with some advice or solution, as the mechanic I use don't know how to remedy the problem, and put it down to age and 'city driving'.
    Thanks,
    gratefully yours,
    StevieL

  • riversiderup May 18, 2009

    same car same problem sometimes goes away @ok but always returnes

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Hi, i think i answered you in another post.
If not then the likely cause of your problem is turbo related the most common cause is one of the pipes going to the turbo has a small split in it causing this problem.

Nearly all the diesel turbo cars with your problem usually means a pipe needs replacing for the turbo this will need to be checked as it can be difficult to find the damaged pipe because they work under high pressure so actually seeing the damaged part can be difficult so check properly.
If you are unsure then get a garage to check this as they will know the fault and will have a good idea exactly which pipe is damaged.
Worst case of this will be that the turbo needs replacing but this is in the most severe of cases the turbo can blow if the pipe has been damaged for to long as it will be working under the wrong pressure.
What happens is when you acelerate the turbo builds up pressure giving you more power when you need it but when the pipe becomes damaged this pressure is lossed and you then lose power and will cause black smoke coming out of exhaust.

Hope this is some help to you but if you have any problems or questions then give me a shout back and ill be glad to assist you further ok

Posted on May 20, 2008

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hi, this problem could be valve stem oil seals these are cheap to buy but will require the top half of the engine been stripped and rebuilt.
If the car has a turbo then you might find that its just a turbo pipe split this is often the case on most cars that have turbo as your is diesel then you should have a turbo. This would be my first choice to get looked at as usually its just a pipe to the turbo has split and this causing the problem your having. Replacing this should not cost to much as it is common problem so look at this first.

Worst case it could be the turbo needs replacing but getting a garage to check this for you is the best bet but hopefully it is just a split pipe going to the turbo.
Most diesel cars with your problem that i have worked on is usually one of the pipes for the turbo has a split in it so replacing this will solve your problem ok.
let me know if you have any problems or questions and ill be glad to assist you ok.

May 20, 2008 | 1989 Peugeot 405

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