Diesel 406 seriously losing power

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Darkchild101
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Re: Diesel 406 seriously losing power

Post by Darkchild101 »

Very important update guys

The last time the car worked fine was Friday and it was a relatively warm day. Today again its been quite warm and not cold and guess what, started it and decided just drive it around the block and its accelerating as normal and going very fast. Only thing thats problem is the plume of black smoke. so clearly as i had at first suspected, the cold is affecting it big time. Am truly amazed :shock: You wouldnt think was the same car that gave me serious bother just last night


Does this narrow it down somewhat for those in the know.


Await your input
jasper5
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Re: Diesel 406 seriously losing power

Post by jasper5 »

If it is in "limp mode" then I suggest a diagnostic check, at least plug in a code reader to see if any fault codes are stored.

A good look at the intercooler and piping is the first check to do, if nothing is found, get a diagnostic check done.

Edit....Don't overlook the obvious, ie, blocked air or fuel filter.

When were they last replaced?

I looked on my diagnostic forum, most people say intercooler or piping, someone suggested taking the wire plug off the airflow meter to see if it improved, others say fuel pressure regulator.
Darkchild101
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Re: Diesel 406 seriously losing power

Post by Darkchild101 »

After working fine this morning its now back to not having power again. When try to rev it, the revs wont go above 3000rpm even when its idle/stopped and thats with pushing pedal to the floor :cry: :cry: :cry:


Very strange how this morning it worked. Parked it come back 5 hours later and its back to not working
Last edited by Darkchild101 on Tue Mar 17, 2009 7:12 pm, edited 1 time in total.
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puggy
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Re: Diesel 406 seriously losing power

Post by puggy »

Hi there , have you actually tried looking at any thing like the turbo
pipework or did you just try it without doing this ??
.. ooh are those drugs for me Matron
Darkchild101
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Re: Diesel 406 seriously losing power

Post by Darkchild101 »

Just been to my mates and he didn't know which is the intercooler even. He tried taking off injectors one by one and we checked air filter which is as clean as you would expect on a car in regular use. Wasn't gonna let him tamper with air flow meter since he couldn't even identify the intercooler or its pipes.


I am really rubbish at cars and can identify just the obvious and basic things and on a student budget will struggle to get it fixed in a garage or they might identify small problem and bill me for a bigger job not needing done at all
Darkchild101
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Re: Diesel 406 seriously losing power

Post by Darkchild101 »

puggy wrote:Hi there , have you actually tried looking at any thing like the turbo
pipework or did you just try it without doing this ??
Thought turbo kicks in above certain level of revs meaning should still perform normal up to a point which its not
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Re: Diesel 406 seriously losing power

Post by steve_earwig »

The pipework goes from the air filter, through the air flow leter, down the back of the engine to the turbo, under the engine to the intercooler and thence to the inlet. Obviously if there's a leak anywhere between the air flow meter and the inlet, fueling will be up sh#t creek (will run like cr@p). If it's after the turbo then it won't be getting much pressure from that either (will run like cr@p and be dog slow too).
Unskilled meddling sin©e 2007

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Darkchild101
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Re: Diesel 406 seriously losing power

Post by Darkchild101 »

Took it to one garage who said outright he was very busy until next next week but advised me leave it for few hours so he loked at it. Later went back and he wasn't sure what it was and suggested i change fuel filter


Took it to another garage explained what the problem is and he said to leave it there and he would do diagnostic check tomorrow and let me know. Stll told him put new fuel filter anyway. Diagnostics on coputer will cost £46 he says. Kept trying sugest its turbo and quoted guys here and said didnt think it was turbo and that he should check egr valve and airlfow meter


Await feedback tomorrow
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steve_earwig
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Re: Diesel 406 seriously losing power

Post by steve_earwig »

Darkchild101 wrote:Kept trying sugest its turbo...
That's his credibility out the window then.
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puggy
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Re: Diesel 406 seriously losing power

Post by puggy »

Cringe time at the thought of what figures he is thinking of putting on
the bill :roll: still think you need to look at pipe work .
.. ooh are those drugs for me Matron
Darkchild101
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Re: Diesel 406 seriously losing power

Post by Darkchild101 »

Just back from the garage that was gonna do diagnostics and he says he reckons its the fuel pump which is going :roll: :roll: :roll: I ask so how much is that and he says no point replacing it cos the bill will run into over a grand as needs replace injectors, the whole fuel system :evil: :evil: That can't be right surely. i asked so what did the diagnostics say and he was very vague about it. He didnt even seem sure where the intercooler was :evil: :evil: Lass at reception whispered i am better taking it to a diesel specialist.


Strangely enough the diagnostics light on dash had been on till then and after taking it out of there, its off permanently now. Now get this, driving it up to garage was losing power and crawling as usual but today driving it back home, just after few meters, it was driving perfect. Just to be sure i was not imagining this, drove 25 miles, went onto A roads and stuff, tried accelerating in 2, 3, 4 and 5th gears and was performing in the way we all love of HDi engines :cry: Was going like the clappers. Stopped engine for 30 minutes and started it again to see if it was a one off and it continued running perfect. Now i am really confused big time


Got the diagnostics print out here with me if its any help. Looking at it afterwards the idiot had left the fuel filter not tightened properly and was leaking fuel (he didnt change it as he reckons there is no point :roll: :roll: :roll: ). Have now took it to another garage in Bathgate and he says thinks usually its airflow meter like guys had suggested here. Specifically told him check egr valve, airflow meter and put new fuel filter so see what he says tomorrow.


Hate saying this but in Scotland simple things that much harder to take care of than England. Wish was still in London, this would have been taken of by now surely. Sucks
Darkchild101
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Re: Diesel 406 seriously losing power

Post by Darkchild101 »

Now my wife just noticed something strane. Got the phone call from them at 10.30 to say they had done the diagnostics and to come in for chat. Looking at the print out says it was done 30 mins after they spoke to us.


Is it possibly he was just going by what he told me yesterday and then just the diagnostics after just to take my money and never really bothered. He was very evasive when asked hi what the report meant :evil: :evil: :evil: :evil:
mark21TD
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Re: Diesel 406 seriously losing power

Post by mark21TD »

The garage's responce does'nt suprise me at all, most are only interested in sevicing HDI's anything other than that they don't wont to know.

I've had 3 turbo pipes split which coused clouds of smoke, no power, and would'nt rev above 3000rpm but it never got better no mater what the weather was so I don't think it's that.

This is just a shot in the dark but could it be an ambeant temp sensor ?
406 2.1TD GLX estate
Xantia 1.9TD VSX estate
brew my own biodiesel

http://www.shorewasteoil.xtreemhost.com/
Darkchild101
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Posts: 36
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Re: Diesel 406 seriously losing power

Post by Darkchild101 »

mark21TD wrote:The garage's responce does'nt suprise me at all, most are only interested in sevicing HDI's anything other than that they don't wont to know.

I've had 3 turbo pipes split which coused clouds of smoke, no power, and would'nt rev above 3000rpm but it never got better no mater what the weather was so I don't think it's that.

This is just a shot in the dark but could it be an ambeant temp sensor ?

Thanks Mark
Will suggest that to the so called mechanic

Mark where is the ambient temperature sensor by the way just incase the fool doesnt even know
mark21TD
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Re: Diesel 406 seriously losing power

Post by mark21TD »

Haven't got a clue mate, I just remember reading somewhere that the ECU took temp readings from coolant, ambeant and inlet but I could be wrong.
406 2.1TD GLX estate
Xantia 1.9TD VSX estate
brew my own biodiesel

http://www.shorewasteoil.xtreemhost.com/
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