3008 1.6 thp lakcs power, hesitations and small stutters

[Idan167_]

Hello,
i'm having a problem and i haven't found one garage that can fix it, so im asking your help so i will try to fix it myself.
the car is peugeot 3008 1.6l thp 165 hp.
few problems actually which I believe related to each other, one of them is it has like small stutters that looks like a very small misfire.
other thing is that it lacks of power, it drives pretty much ok but not as it should. a none car guy would not notice but if you know some things on cars you can feel something isnt right.
when its gear changing you can feel a sort of hesitation and a stutter like its not changing smootly and not because of the transmission but becaue of the engine..
the rpm is fine cannot notice any play.
I have done a air leak test in case its losing boost and found nothing..
also the engine sounds a bit weird, as i know their natural sound is a bit noisy but dont know if thats that.

there is a check engine light and the code is p0420 catalytic converter, and p16a7 13 oil vapor recirculation system.
also i looked on the live information of the injection and fuel mixture to see if there is something off and found that some weird values i think.
i would appriciate if you could take some time to look at these pictures and say if you see something off.
also i upload a video of the engine at idle, before i have done service and after. on the second video you may not notice a stutter, but there is.
thanks and i hope you can help me find the problem.

[Muir]

Hi, welcome to the forum.

It's very difficult to make out what Diagbox says in those pictures and they don't seem to work when going directly to Imgur (I get a blank page each time).
Please try to upload them directly into the post through the attachments tab:

[Idan167_]

Hi, welcome to the forum.

It's very difficult to make out what Diagbox says in those pictures and they don't seem to work when going directly to Imgur (I get a blank page each time).
Please try to upload them directly into the post through the attachments tab:

Hi thanks
i updated the post

[Muir]

Thanks that helped a ton.

I'm not very experienced with newer gas engines but did find another post about the P16A7 13 fault:
viewtopic.php?t=83412
One of the symptoms are presumably like the one you're experiencing, engine hesitant.

It's tempting to think this may also be related to your cat DTC.
My thought is your PCV valve is somewhat defective and is bypassing a lot more oil into the inlet manifold than it should, which in turn is poisoning/has ruined your catalytic converter.
If the cat is defective it would throw off the rich/lean readings.

It's just a guess though and I can't say if the PCV vapor heater being defective could cause this.

You could try removing your oxygen sensor and having a look-see, since it's easily accessible on the left side of the turbo.

[Idan167_]

Thanks that helped a ton.

I'm not very experienced with newer gas engines but did find another post about the P16A7 13 fault:
viewtopic.php?t=83412
One of the symptoms are presumably like the one you're experiencing, engine hesitant.

It's tempting to think this may also be related to your cat DTC.
My thought is your PCV valve is somewhat defective and is bypassing a lot more oil into the inlet manifold than it should, which in turn is poisoning/has ruined your catalytic converter.
If the cat is defective it would throw off the rich/lean readings.

It's just a guess though and I can't say if the PCV vapor heater being defective could cause this.

You could try removing your oxygen sensor and having a look-see, since it's easily accessible on the left side of the turbo.

Thank you for your answer,
A question, since the pcv valve is not expensive to replace, should i start with that?
Also if i remove the oxygen sensor what do i suppose to see?
Another thing, a friend of mine is suspecting the high pressure fuel pump, as he had a same experience but with a whole different type of car. Could it be it?

[gwest]

You don’t state the kms the car has travelled but have you checked the condition of the intake ports and valves? These engines are notorious for carbon buildup. Best way to inspect is with intake manifold loosened and an endoscope inserted.

[Idan167_]

You don’t state the kms the car has travelled but have you checked the condition of the intake ports and valves? These engines are notorious for carbon buildup. Best way to inspect is with intake manifold loosened and an endoscope inserted.

It has 143,000 km, I myself didn't but one shop told me he has done a carbon clean because he suspected the same thing you say. Don't know how he did tho.. pretty much everyone telling me the catalytic converter needs to be replaced (even though i don't believe that's the case they just don't want to work), but if it did went bad something made it to.. so replacing it without finding the source of the problem is not the solution right? Just my aspect of view..

[Muir]

Thank you for your answer,
A question, since the pcv valve is not expensive to replace, should i start with that?
Also if i remove the oxygen sensor what do i suppose to see?
Another thing, a friend of mine is suspecting the high pressure fuel pump, as he had a same experience but with a whole different type of car. Could it be it?

I'd check the oxygen sensor first thing.
You'll want it to be completely dry with with maybe a thin layer of greyish/brownish deposits that easily brush off.

As for the PCV you could try removing the intake pipe after the PCV valve connector, maybe the flex part that connects to the turbo inlet (engine off of course).
It's hard to determine if the amount of oil you find in there is abnormal, unless it's downright dripping out of it.

Could very well be a fuelling issue yeah - try comparing desired & actual fuel rail pressure.