Overboost ...

[bales 1]

On mine the VSS did not make any difference to the boost solenoid.

 

However given the multitude of ways in which people carry out this conversion I wouldn't like to say whether that should be the case or not - I would imagine in the standard car i.e a 406 in my case it was obviously there to play a part in maybe traction control? Did the 406 have traction control?

[Dandu 0]

Hi bales,

 

I'm grateful for your answer. And I'd be thrilled to get to know, what the other turbo owners report.

 

By the way my donor car was a Peugeot 406, too. The car was built in 1997.

 

Cheers Dandu

 

p.s. I don't know, if the Peugeot 406 has got traction control.

Edited July 22, 2010 by Dandu

[jackherer 543]

I used to run a 2.0T in a 1996 Xantia Activa. The VSS was intermittent, sometimes it was fine, other times the speedo would be dead for weeks. When the speedo didn't work the engine was a little rough as you raised the clutch pedal to pull away in first gear, it almost felt like a missfire. Also fuel consumption seemed worse with the VSS dead but its hard to work out the economy with no VSS so I can't be sure.

[Dandu 0]

Quite interesting, jackherer! I think, I'm getting close to the truth.

 

Is there anybody else willing to comment on my questions? The last one, too:

 

"What else might the cause for my boost problem?" In case the fault code 27 is irrelevant, the problem might stay in relation with someting mechanical. My assumptions:

 

1. The turbo itself?

2. The spring of the wastegate actuator?

 

Both seem a bit strange to me, because the boost level changed all of a sudden. Is there a chance?

 

Bye Dandu

Edited July 23, 2010 by Dandu

[jackherer 543]

Sorry, I missed a significant point in my last post, when the VSS was dead the power/performance seemed unchanged apart from the 1st gear pulling away stutter.

[Dandu 0]

Nice to know, jackherer. It seems like I can luckily bring the proper (fortunately still unused) VSS back to Peugeot. To play it safe I bought the last available VSS in Berlin 2 days ago ... for a very reasonable price: 160 €.

 

Bye Dandu

Edited July 23, 2010 by Dandu

[welshpug 1,661]

we have them on ebay here for £20-£40, proper valeo units.

[Dandu 0]

Unbelievable ... but worse than the price was the assistance / guidance of the Peugeot staff during the phone call: "What? You don't have a vehicle chassis number? You bought the engine only? It resides in a 205? For heavens sake! It'll last days to find the right VSS." Nearly everyone actually wanted to say: "Why didn't you call someone else?" A proper customer service means something else to me.

 

But to safe the reputation of the Peugeot dealers in Berlin ... there are some exceptions. As far as I know: the one, I bought the part from (Berlin-Lichtenberg).

 

Bye Dandu

Edited July 23, 2010 by Dandu

[Dandu 0]

Just to come back to topic ... Has anyone ever experienced a lack of boost ... to be more precise: less boost than normally? How did you solve the problem?

 

Cheers Dandu

Edited July 26, 2010 by Dandu

[Jamal 2]

My VSS came from a 106. It's a Sagem combo one.

 

Maybe my problem came from the wrong ECU temp sensor, but don't know exactly, because I fixed the two problems at the same time.

The lack of ECU temp sensor caused a drastic idle drop after warming in.

 

The fact is that after fixing the problems my car is ok.

Also tightened a little on the wg spring too, before the fault finding.

 

Hope it helps.

[Dandu 0]

Hey Jamal,

 

I appreciate your detailed answer. I owe you gratitude.

 

Every turbo owner around me means, the VSS is not necessary. And actually my car is a good evidence, it drove perfectly without it. Thus, I'll not install it.

 

Reading your lines the opinion substantiates, that my WG spring should be hardened. I've heard that before. Thus, I'll check it as soon as I can.

 

I'll keep you informed.

 

Cheers Dandu

Edited July 27, 2010 by Dandu

[Jamal 2]

Hey Jamal,

 

I appreciate your detailed answer. I owe you gratitude.

 

Every turbo owner around me means, the VSS is not necessary. And actually my car is a good evidence, it drove perfectly without it. Thus, I'll not install it.

 

Reading your lines the opinion substantiates, that my WG spring should be hardened. I've heard that before. Thus, I'll check it as soon as I can.

 

I'll keep you informed.

 

Cheers Dandu

 

I've read somewhere, that the wg has to open around 7 psi, if it's linked directly into the inlet but it's not 100%

I've adjusted my around 5 psi. But maybe later will try 7 psi too

[Dandu 0]

Update: Axle collars fixed. I can drive around smoothly. Thus, it was time to focus the old problem: "lack of boost". In a fit of curiousness I checked the fault codes, the other ECU 200219 reveals. Just to help remembering, that's the one with the alterations of the maps - resulting in 1 bar boost, no overboost. This ECU only reveals fault code: 47. Regarding the list of codes, the turbo pressure regulation is faulty. That's precise. By the way, the ECU 200219 gives me the same boost to drive now as the other one: 7 psi only.

 

Is there anybody able to draw a conclusion from the "47"? I just want to be as precisely as possible in planning the next step. I don't want to fiddle about the wastegate actuator in case it's not necessary.

 

Cheers Dandu

[Jamal 2]

Update: Axle collars fixed. I can drive around smoothly. Thus, it was time to focus the old problem: "lack of boost". In a fit of curiousness I checked the fault codes, the other ECU 200219 reveals. Just to help remembering, that's the one with the alterations of the maps - resulting in 1 bar boost, no overboost. This ECU only reveals fault code: 47. Regarding the list of codes, the turbo pressure regulation is faulty. That's precise. By the way, the ECU 200219 gives me the same boost to drive now as the other one: 7 psi only.

 

Is there anybody able to draw a conclusion from the "47"? I just want to be as precisely as possible in planning the next step. I don't want to fiddle about the wastegate actuator in case it's not necessary.

 

Cheers Dandu

 

 

If the turbo pressure solenoid is faulty, it stays open all the time, so the 7 psi will be standard because the wg actuator has this opening pressure for safety reasons.

[Dandu 0]

Hey Jamal,

 

that's quite interesting. Thus, it seems like I have to replace the solenoid. Although it seems a bit strange to me, that I didn't get the fault code: 46. This one would definitely indicate a malfunctioning BPSV. But I'll give it a try anyway.

 

Is there anybody able to sell me a spare one? Something like "9522" is scribbled on mine.

 

Bye Dandu

[Jamal 2]

Hey Jamal,

 

that's quite interesting. Thus, it seems like I have to replace the solenoid. Although it seems a bit strange to me, that I didn't get the fault code: 46. This one would definitely indicate a malfunctioning BPSV. But I'll give it a try anyway.

 

Is there anybody able to sell me a spare one? Something like "9522" is scribbled on mine.

 

Bye Dandu

 

Hmm

Fault code 46: Turbo boost pressure solenoid valve (BPSV or BPSV circuit)

Fault code 47: Turbo pressure regulation

 

Maybe 46 and 47 are means the same...

Or 47 is the fault of the ECU?

[Dandu 0]

I'll let you know, if it worked out with the exchange of the BPSV. Bye Dandu

[Dandu 0]

BPSV exchanged. Result: still the same lack of boost. ... It's a pity. I think, I'll check the wastegate actuator spring next. Cheers Dandu

[Tom Fenton 1,542]

Dandu, are you 100% sure you do not have a boost leak somewhere buddy? Whenever I've had problems with boost pressure on my 205 turbo it has been boost leak related. Also a friend with a 2.0T has the same thing.

 

Possibly the fault code is made as the boost level is not reached no matter what the duty cycle of the boost valve is?

 

Just a thought.

[Dandu 0]

Hey Tom,

 

I deeply appreciate your comments. ... Unfortunately I wasn't able to find a leak recently. But it's certainly worth an attempt to redo it. Perhaps I've been a bit inaccurate. While I was driving today, I suddenly had a slight feeling to hear some hissing. I wasn't sure whether I'm fantasizing, or not. Actually I was a little annoyed, that I couldn't check it more accurately. The engine fortunately doesn't build up boost, after stopping the car, opening the bonnet and playing with the throttle at idle. But I don't have to tell you that ...

 

Possibly there is another way of checking for boost leaks as to watch for them?!

 

Cheers Dandu

Edited September 1, 2010 by Dandu

[Tom Fenton 1,542]

Sadly I know no other way than to go over every joint in the pipework to double check, and remove each section of hose to check it is not cracked or split. An arduous and time consuming task but it has been worth it for me when you cure the loss and full boost is resumed.

[Dandu 0]

I'll do my best ... Bye Dandu

[Dandu 0]

Update: I've found a hose, that leaks. And of course it easy to get a proper spare part. I already checked 3 suppliers, but to no avail. But it's only a matter of time. Cheers Dandu

[Jamal 2]

Update: I've found a hose, that leaks. And of course it easy to get a proper spare part. I already checked 3 suppliers, but to no avail. But it's only a matter of time. Cheers Dandu

 

Wich hose?

[Tom Fenton 1,542]

Replacement silicone bends are easy to get hold of and not expensive, can even be got in black if required!