2003 Peugeot 307 SW HDi 110

My recently acquired 307 lacks power. Everything happens in the first
half inch or so of accelerator pedal movement. Pressing it beyond that
has little effect.

The local garage has just changed the timing belt at 95000 miles. I
had them check for fault codes but they found nothing wrong. They
reckon that the turbo isn't spinning and advised me to take it to a
Peugeot dealer, something I'm reluctant to do, given the way they
charge!

I've checked the air flow sensor which is working normally. Are there
any other sensors I should look at before biting the bullet? If so can
anyone suggest where I can find the normal sensor readings?

Thanks in advance

Richard

 

Was the car playing up before you took it in to them??? if not it is up
to them to put the fault right as it has gone wrong while it was under
there care.(as tradeing standards would love to deal with this one .)

 

Unfortuneately yes it was. I just5 got them to run a diagnostic check
whilst they did the timing belt change.

 

They dont seam to be much of a garage, if they cant do more than a
timing belt ,most of us garages can do all work on cars or vans,as we
have all the Mechanics trained to do any thing which comes in .i think
they dont what too know,

 

This may sound silly, but have you checked the throttle cable? After some
work was done on my 406 the cable had been left badly adjusted and gave much
the sort of effect you are describing. Only took five minutes to put it
back to its normal lively self.

 

No, it's not that. In fact there's no cable, just a potentiometer on
the pedal.

Incidentally I've just checked the mpg. Less than 40. Rubbish really!
My old 405 diesel would easily return 50 without me driving carefully.

 

Well you know what to do then sale it and get a 405 again??

 

If this thing doesn't shape up that's exactly what I'll do!

That old 405 had 195000 miles on the clock when I got rid of it. I put
100000 miles on it in 5 years with no engine problems at all. I
finished up running it on 30% cooking oil which stopped it smoking
completely. It was by far the most reliable car I ever owned.

Ahh they don't make 'em like that nowadays.

 

I once had an 1989 205D (1.7Diesel, no turbo) I bought it with 75000 on the
clock, my wife and I both drove it for several years until it had 283000
miles on it and I eventually sold it to a work mate. The last I heard it had
over 300,000 on the clock. The engine has never been touched (apart from
cam-belts and water pumps etc) Just change the oil+filter every 5000 miles
and *never* let it run low on water or overheat because the head gaskets are
a little weak.

Regards Julian.

 

Please, please! You're all making me feel terrible for losing that
405.

I've got an awful feeling that this new thing is going to be a load of
trouble.

 

Oh, I forgot, it always returned almost exactly 60mpg and was remarkably
sprightly even though it didn't have a turbo!

Julian.

 

I got a old 405 with over 265000 on the clock. all i have done to it is
give it oil changes and filters changes,every 4th month and it has
never let me down. even when it was standing around for 1 week when i
went off to egypt in november last year, mind you it is a diesel.iam
very very happy with it , got told when i got it that i would not like
it and that was 5 years ago and i have never looked back.

 

Good so go and sale that thing you got and go back to a 405. and make
us all very happy lol lol.

 

The saga continues.

I've tested the MAP sensor on the road. The reading at tickover or
with the engine stopped is 2.34 volts. The highest reading I got was
2.6 volts at about 3500 RPM pulling uphill in second gear. Fairly good
news I suppose because it shows that the turbo is at least doing
something. I reckon that if it was broken if anything I'd see a vacuum
at the intercooler.

On the downside though, the antipollution fault has just come up. Do
you think that has been the trouble all along?

Thanks

Richard

 

Yes. The engine is limited to 2500 RPM when antipollution fault comes up.
Would explain the lack of power.

Godfrey.

 

Thanks Godfrey

It's starting to make sense. I measured the boost pressure in the hose
from the intercooler to the inlet manifold. The highest pressure
measured is about 2.5 psi or 0.16 bar which corresponds to about 2.6
volts. Also, the MAP sensor reading drops to 2.25 volts on overrun,
suggesting a vacuum in the inlet, which is what you'd expect if the
turbo stops blowing. All this suggests to me that the MAP sensor is
probably OK.

Could there be something wrong with whatever controls the turbo? Is
there a solenoid valve or something that controls the waste gate?
Perhaps the waste gate is stuck open.

By the way, the antipollution fault has mysteriously gone away.

Sorry if these questions show my ignorance. I've never had a turbo
diesel before.

 

Turbos are o.k when running o.k you start getting problem with them
time to get rid of it ,lol.

 

I can't add much else as I'm no expert on turbo diesels, apart from being an
owner of a 307 HDi DTurbo 110 which suffered from the dreaded antipollution
fault about a year ago. The only adverse effect was rev limited to 2500 RPM.
As I was on a motorway at the time the car continued to drive normally as
2500 RPM in 5th gear is over 70 MPH. Anyway, the fault was fixed by my
Peugeot dealer under warranty. They replaced the particulate filter in the
exhaust system and the lambda sensor (exhaust gas oxygen sensor). Check this
out: http://www.picotech.com/auto/lambda_sensor.html

I suspect the problem with your car could be a failing sensor. One other
thing, the turbo in my car makes a distinctive whine but I can only hear it
with the windows open. Presumably you can hear the turbo working in your
car?

Godfrey

 

Just to let you know, it's fixed.

There were two problems. The vacuum valve that controls the turbo was
duff and the elbow connecting the vacuum pipe to the servo actuator
was split.

Perhaps I won't bother getting another 405 just now. I'll see how
reliable this thing turns out to be.

Thanks everyone,

Richard

 

So at last you got it done did it take them long to find the fault or
was it in and done while you was on your way home ???(lol)