Viewing: jerky boost?

**Matt L** · 10-01-2010, 05:26 PM

i have a 2003 307 hdi 110. when it finally comes on boost at around 3000rpm the boost isn't smooth and makes you rock backwards and forwards in the seat. is this right for a standard car?

also i mentioned in an earlier thread that it requires alot of revs to get moving from stand still. well i was wrong, the pedal has alot of travel before the revs change. is this normal as well?

thanks,
matt.

***HDi fun*** · 10-01-2010, 06:15 PM

The boost on the HDi 1110 should come in imperceptibly and from much lower in the range. Something like 1200-1300rpm should be where the turbo starts doing useful work.

The accelerator is a drive-by-wire arrangement so it's dealer time, I think - It sounds as if there's some problems with the car - get it onto a diagnostic fault code reader ASAP.

**Matt L** · 10-01-2010, 06:17 PM

thats what i was thinking, just wanted other peoples opinions before i went in all guns blazing to the garage i bought it from. it's a shame because its a lovely car and well spec'd too

***HDi fun*** · 10-01-2010, 06:20 PM

There's a very good Peugeot / Citroen specialist in Brackley. He looked after my 2.2 HDi superbly and at much more attractive prices than Peugeot franchises.

**Matt L** · 10-01-2010, 06:22 PM

i only picked the car up yesterday from a garage in lincoln, and have 30 day gaurantee with them, plus an aa warranty so we shall see what they say i guess

***HDi fun*** · 10-01-2010, 06:48 PM

OK - that's fair enough. Personally I'd cut to the chase; reject the car completely and insist on a full refund if you've only had it a few days.

**Matt L** · 10-01-2010, 06:53 PM

a friend of mine, a knowledgable bloke with engines etc said the same thing. i probably should have gone with a 320/330d from the start and had trouble free motoring lol

***HDi fun*** · 10-01-2010, 08:15 PM

I have to say that I had no problems with my 2.2 HDi over the 5 year period I owned it. (Apart, that is, from the silly bitch who wrote it off for me in June by driving straight out of a T-jct in front of me on a 60mph road - I'm lucky to be alive)

Mine had a 190bhp remap as well, so I can vouch for the robust nature of the drivetrain.

PSA mechanicals are pretty sound, it just seems you've had a bit of bad luck here. I would reject this car, however. It seems flawed to me from what you say.

As for other options you can do a lot worse than a Mondeo ST TDCi; Ford's quality control is right up there with the Germans now.

**Bertrum** · 10-01-2010, 08:19 PM

Quote:

Originally Posted by HDi fun

As for other options you can do a lot worse than a Mondeo ST TDCi; Ford's quality control is right up there with the Germans now.

Thats true, The Focus' i drive at work are very robust. They are built in Germany now though so you'd expect nothing less

**Matt L** · 10-01-2010, 08:21 PM

mondeo st tdci was one of the cars i was thinking of, but they are still holding big money

i like my 307 it has alot of what would be optional extras on the german range.

i think rather than reject i'd prefer them to sort it...but then what corners will be cut to save costs is the question i think?

p.s what is the button marked something like .))))) on the left of the door lock button for? i dont have a manual with the vehicle.

**Bertrum** · 10-01-2010, 08:28 PM

if you register your details on peugeot.co.uk (goto the my peugeot section) you can view a manual for it. you have to put in the VIN number for them to identify the right model

***HDi fun*** · 10-01-2010, 08:33 PM

Get a 406 - 2.2 diesel if you can find one - they're a bit long in the tooth but they're tooled up very nicely with fully electric adjusting front seats, auto wipers, auto-lights, cruise control etc on the higher models.

They also stand up well in a crash, as I can testify.

I think the button is to disable the interior ultrasonic sensors when the car is locked and alarmed.

**Matt L** · 10-01-2010, 08:42 PM

i thought it had somethign to do with the alarm but was sure.

i really wanted a 406 but could only find a 2.2 in estate form. also was told from a diesel specialist the 2.2 hdi is quite unreliable?

i still regard psa diesels as the best available, the old 2/405 and 306 xud/t were a testiment to peugeot in my opinion.

i've also just been thinking, could i perhaps have a dying maf or boost control solenoid? something's telling me its the maf through the symptoms being pretty similar to a mates old golf 20vt that had a maf die

***HDi fun*** · 10-01-2010, 09:27 PM

The only problem the 2.2 might suffer from is that it was a very early adopter of the particle filter system - long before most people had heard of them. (Most dealers weren't that knowledgeable at launch time either).

This caused confusion - wrong oil will poison the DPF, as will outrageously low rev driving (changing up at 1500rpm all the time, for example). DPFs need to get hot to work properly.

I can honestly say that I had no issues with reliability in over 5 years and over 100,000 miles of use. I am wary of many so called diesel specialists - lot's of 'em are still stuck in the good old rotary or in-line pump days. The HDi engines are too complex for your average olde worlde diesel mechanic in my opinion.

The MAF might be the cause of your problems, the only way to tell is to swap it out and see. Let the car dealer take responsibility for this - don't interfere as it might compromise your chance to snatch a refund if that's what you want to do.

I'd still seize the opportunity to walk away if you are disheartened with the car, but that is a decision only you can make.

The boost control and turbine vane geometry are ultimately operated by vacuum actuators (although they are managed via the ECU, along with everything else including all the interior electrics).

The HDi engines are a positive improvement over the still excellent XUD-T series.

PSA was one of the earliest to deploy fully managed high pressure direct injection engines in passenger cars.

**pgarner** · 10-01-2010, 11:14 PM

is the 406 a Varible vane turbo ? if so it could be the vanes are sticking and not allowing you to get the boost on quickly. a diagnostic should show that the requested boost and actual boost are not close.

from the VAG setup the VNT turbos are bad for sticking if they do alot of motorway miles ie the vanes not shifting position very often

***HDi fun*** · 11-01-2010, 09:03 AM

The 406 definitely has variable geometry. Not sure about MattL's 307 but I imagine it is.

**Matt L** · 11-01-2010, 01:09 PM

I was told that only the 136 came with variable geometry turbo's but i'm not 100% on that.

Just about to ring the dealer now and put my point across

***HDi fun*** · 11-01-2010, 02:52 PM

Is your 110 the 1.6 or 2.0 derivative?

**Matt L** · 11-01-2010, 06:25 PM

2.0 110 bud tried finding the egr valve to disconnect it to see if that was the cause of any poor idle and acceleration yesterday, but couldn't see anything and got cold too quickly haha

***HDi fun*** · 11-01-2010, 08:03 PM

These are not known to be problematical on the Peugeot engines.

**Matt L** · 11-01-2010, 08:05 PM

i've seen a few threads on various forums relating to egr problems so in my opinion its worth a try if it doesnt get fixed tomorrow or whenever they decide to book it in.

***HDi fun*** · 11-01-2010, 09:05 PM

A bottle of Millers Diesel Treatment (Ebay is a good source) can work wonders with all kinds of fuel and gas flow problems.

Again though, stand aside and let the supplying dealer sort it out.

**Matt L** · 12-01-2010, 12:41 AM

i put 3 shots of millers into a brimmed tank on sunday and nothing has changed yet (only done 50 miles so not expecting much yet). it's going in tomorrow lunch to be looked at so fingers crossed they should sort it.

noticed tonight how rough it idles, feels like a misfire would in a petrol car (shaking). i cant work out why i have what feels like 3-4cms of pedal travel before the revs increase, surely that can't be right?

***HDi fun*** · 12-01-2010, 01:59 AM

None of it is right. It's possible that this car has more than one fault by the sound of your reports.

Let 'em have the opportunity to resolve all the problems. But one time only.

Be open and honest, report every problem, in fairness the dealer didn't mean to sell a dud car so let 'em have reasonable time to fix things. If that's what you want. I'd still reject the car because it's an unknown quantity. as such it's a liability to you.

Under statutory law you are entitled to reject the car immediately and receive a full refund. It might take some time to convince the dealer of this, but they will have no choice other than to give in to your wishes (your rights, even) if you persist.

**theballboy** · 12-01-2010, 01:33 PM

Quote:

Originally Posted by HDi fun

Get a 406 - 2.2 diesel if you can find one - they're a bit long in the tooth but they're tooled up very nicely with fully electric adjusting front seats, auto wipers, auto-lights, cruise control etc on the higher models.
.

Interesting
What kind of torque figures are available for these after remap?

Also, do the newer 407 2.2 HDI's remap as well as the older models? Is it still the same engine?
Cheers