Peugeot 307 2.0hdi Boost problems

[Teodor1]

Hello,
I havea problem with my Peugeot 307 2.0Hdi 107HP. Bosch EDC15C2 . RHRengine. I have blanked EGR valve and removed DPF – both softwareremoved too with no faults there from years. The car was felt last 2weeks so slow with missing boost. I have replaced turbo controlsolenoid valve with new but there was no joy. Checked the vacuumpipes and I have did no see leaks. Replaced the electrical connectorof the turbo solenoid valve … still no good. I made diagnostic withPP2000 and appeared P0299 – permanent fault low turbo pressure:


ECUfault code: P0299
Enginespeed: 4 369 rpm
Actualdelivery: 14 mm3/stroke
TurboPressure: 1 318 mbars
Turbopressure reference value: 1 647 mbars
EGRsolenoid valve OCR: 88%


ThanI made some measurments on car hold ( not drivingon distance ) at engine speed 800 and over3 000 rpm.


Enginespeed: 800 rpm 3 084 rpm
Measuredfuel pressure: 298 bars 533 bars
DieselPressure Regulator: 18 % 24 %
Inj.Flow correction 1 -0,43 mm3/stroke -0,51 mm3/stroke
Inj.Flow correction 2 0,20 mm3/stroke 0,20 mm3/stroke
Inj.Flow correction 3 - 1,61 mm3/stroke - 1,61 mm3/stroke
Inj.Flow correction 4 1,76 mm3/stroke - 1,76 mm3/stroke
Injectorvoltage: 80,2 V 79,8 V
MeasuredAir Flow: 435 mg/ impulse 394 mg/ impulse
EGRvalve electrovalve OCR: 0 % 0 %
EGRthrottle electrovalve OCR: 0 % 0 %
TurboPressure Measured: 1 012 mbars 1 012 mbars
Turbopressure Reference Value: 1 129 mbars 1 435 mbars
TurboPressure electrovalve OCR: 88 % 88 %
Atmosphericpressure: 988 mbars 988 mbars





Ihave a few questions:
1.Is that values normal?
2.What is problem with correcction of 3 and 4 : bad injectors?
3.Measured Air Flow OK for that rpms?
4.Is turbo solenoid control valve OK, it is new but that percentagesnot moving ? - vacuum leak, blocked valve from oil that come fromintercooler, a dodgy + to electrical connector ( the wire seems to metoo dark and burned but checked withmultimeter and working). How this valvework – if he does not feed 12V , is it working … with 5-6V , if acable is not OK …There is beep signalfrom multimeter on pin b4 on the ECU – Autodata source.


Sometimescar have good boost and drives OK, sometimes when I change to highergear and after that there is no boost at all and accelerates reallybad.


Maybeif that Turbo Pressure electrovalve OCR 88 % doesn’t move I shouldcheck for dodgy supply … or can it be from vacuum leak?

[Dunker]

What does MAP sensor look like. Is it all clogged with gunge. Have you smoke tested it. Have you checked the VAC pipes and actuator solenoid.

[Teodor1]

Dunker, thanks for the reply ...
Will check MAP tomorrow ...
The car isn't smoking at all, checked the VAC pipes ... not too deeply but did not find problems with leaks ... only little oil there from intercooler. Vacuum solenoid is new, bought yesteday a Pierburg. The solenoid is with proper installed vac lines, i mean they aren't switched. I hear the turbine, maybe little later around 2200 the boost is OK, but still feel it sluggish. I suspect electric feeding cable to turbo solenoid but it seem to me pretty hard to trace it to the ECU. Checked with multimeter and there is "beep " signal, so it is not broken. However the cable inside seem to me little fried , dark and hard ... maybe it is deliver 12V but sometimes ...

[Teodor1]

Today I cleaned the MAP with proper spray and nothing changed ... but that did not prove anything - it could be just faulty and maybe doesn't matter how many times will be cleaned.
Car is still slow. Tomorrow will investigate the vacuum pipes. One thing is for sure - turbo solenoid valve is new and should be fine.
Maybe next days will try to find another MAP to see if there any difference.

[Teodor1]

Bought a new MAP and nothing changed. I drove 90 km and it is intermittent problem. Sometimes the boost is so good and it run up on the hill really quick, sometimes it so sluggish and it is hard to maintain speed.
Maybe will check vacuumlines and ... air doser ... if it calls that way - one thing where start 2 vacuum lines - one for turbocharger and one for the brakes (maybe? ). They are underneath big air pipe coming from intercooler to the intake manifold ...

[olegario]

try to swap turbo relay, new not means good, had problems with new pierburg relays few times

[Teodor1]

Thank you for the replay. Turbo relay ... i guess you mean the turbo solenoid valve ... 4 of them changed.
1st was mine - opened and cleaned the filter in it, than opened and cleaned inside but i can't close it proper ...

2st - bought second hand - nothing changed but it could be faulty too ...

3rd - the second replaced with other second hand, might be faulty too

4rd - a chinese one.Bought as new, there was pretty good boost but it was faulty - it doesn;t shut off the turbine and go in limp mode because there was a fault "turbo pressure too high".

5th - the new pierburg

I can check that if I install the chinese one there will be good boost ... if that maybe you are right for faulty new Pierburg

[olegario]

yes, I mean solenoide, and check if you have enough vacuum, at least 0,7bar
you can connect vacuum clock with T connection between turbo actuator and solenoide ,and put it on the window, and make test drive, to see how works your vacuum system.

[Teodor1]

yes, I mean solenoide, and check if you have enough vacuum, at least 0,7bar
you can connect vacuum clock with T connection between turbo actuator and solenoide ,and put it on the window, and make test drive, to see how works your vacuum system.

Thank you for the suggestion, will try that too. There is a vacuum, it feels but i did not measured exact values.

Sorry all , who trying to help me but i am slow with replays because i did not have time this week. Will try everything i hope next week ...

[Teodor1]

Today I put the chinese vacuum solenoid and the boost is back. The problem with it was that the turbo is overboosting - the valve did not open the westgate of the turbo and in high RPM the car go in limp mode - max 3000rpm and check engine light with fault - turbo pressure too high. If i maintain the rpms below 3 500 all is fine.

The new Pierburg valve seem faulty to me and i try to replace it in part store - the problem is that hey take it and will send it to Germany to be tested in Pierburg. It may took a month before a answer from them. Now they did not refund me and take the valve .... i suspect what will be their answer and i think i lost 60 euro for that faulty valve ...


Can someone explain how this valve work - what happen when the ignition key is on, what happen when the boost pressure is enough, how it shut the turbine to not overboost ...

[Teodor1]

I do not know the principals of the system, how it works.

1. When engine increase rpms the vacuum it produce.. does it increase too?
2. The valve is open and when the acceleration pedal is pressed with increasing of rpms the valve closes the vacuum and turbo wastegate opens? Is that stop overboosting?

[bonecrusher]

change the air flow meter and all problems will be solved

[Meat-Head]

Agree with above. But did have one once where the small take off break servo
was full of “pencil dust”. Can you use small copper pipe to bypass valve check turbo moves

had one once where pin through turbo seized

[dehacko]

try test disconnect MAF sensor power is strongered?
MAF second test narrow air flow on Maf senzor with tape power is strongered?

MeasuredAir Flow: 435 mg/ impulse 800rpm - correct 394 mg/ impulse 3000rpm incorrect value

[Teodor1]

The boost is OK now, with the chinese vacuum valve. The new Pierburg was faulty and i am trying to return it to the seller but he doesn't want to give me back the money. For me - the problem was faulty solenoid turbo control valve. The chinese one that i was bought 2 years ago i taught for faulty because on highway on high revs appeared a fault - turbo pressure to high. But now with the new MAP ssensor... it doesn't record a fault and now i think the old MAP was faulty high measurments... i do not know. The car drive fine now, with normal fuel consumption and excellent boost. No recorded faults for 29 days...

[Teodor1]

So last week they give me back my money for the newe faulty Pierburg solenoid valve. The car is fine, no recorded faults for 40 days so that was the problem - faulty turbo control solenoid valve - PIERBURG 7.00968.04.0

Thank you for all the replies, case is closed.

[Teodor1]

try to swap turbo relay, new not means good, had problems with new pierburg relays few times

That was the milestone - that force me to check "new not means good" ..... They sold me faulty new Pierburg, than did not want to give me my money back ... but I was so stubborn and was ready to use a lawyer and sue them ...for 55 Euro. They at last understand that and pay back. Thank you for replays.

[Meat-Head]

I believe DK member teuton once said “new - never ever worked”