1.8t BAM misfire problem

[AceD909]

Yes, the 1.8T is susceptible for boost leaks with the elaborate PCV system

I tested the car again, runing good now and no more leaks just the VVT gasket. But i don't have VCDS at the moment to check the fuel trims.
I will clear codes and check for misfires and also the fuel trims, will post the results here.

Questions:
Because i can't find the PCV hose, can i do it with 2 hose connectors and silicone hose?

Can the VVT gasket be changed without taking apart the camshafts?

 

[nd-photo.nl]

This is how it looks. The hockey puck is not on this picture

Information for simplification: https://www.uk-mkivs.net/threads/1-8t-pcv-simplification-and-catch-can-installation.17685/

 

[AceD909]

This is how it looks. The hockey puck is not on this picture

Information for simplification: https://www.uk-mkivs.net/threads/1-8t-pcv-simplification-and-catch-can-installation.17685/

Mine hose which had hole in it, is number 2.
I should be able to recreate it using silicone hose and connectors like this

 

[ExiledWeegie]

that hose is available on amazon or ebay, its a common part.

regards the vvt gasket, you need to de-tension the chain using the tensioner tool, then you can lift it up around an inch which gives enough room to get in and replace the half moon and tensioner gaskets.

 

[mty12345]

The part number for the BAM version is

06A103221BG​

​

Full parts diagram​

https://seat.7zap.com/en/e/leon+sea...der+head+cover+1+8ltr+2002+id-103-103085/#13A​

 

[AceD909]

The part number for the BAM version is

06A103221BG​

​

Full parts diagram​

https://seat.7zap.com/en/e/leon+sea...der+head+cover+1+8ltr+2002+id-103-103085/#13A​

It is not that hose
06a103213ak

 

[AceD909]

that hose is available on amazon or ebay, its a common part.

regards the vvt gasket, you need to de-tension the chain using the tensioner tool, then you can lift it up around an inch which gives enough room to get in and replace the half moon and tensioner gaskets.

Yeah the hose is available on amazon or ebay, but in Macedonia is almost impossible to get it shipped.

The vvt gasket will be changed in couple of days.
Thank you for the info, not needing to take all apart is good.

 

[mty12345]

It is not that hose
06a103213ak

Sorry bro, was looking at the wrong diagram lol.

 

[AceD909]

Sorry bro, was looking at the wrong diagram lol.

No worries mate, today i cleared codes and checked the fuel trims, the block 32 now has 2.5% Adaptation(Idle) and no misfires at all.

With MAF connected the boost pressure is lower than expected at 0.7bar, peeks at 1.2bar drop to 0.7bar holds there and drops to 0.5bar at rev limit.
The car is running very smooth on idle and driving.
Boost meter shows at idle -0.7bar.

What could be the cause?

 

[mty12345]

No worries mate, today i cleared codes and checked the fuel trims, the block 32 now has 2.5% Adaptation(Idle) and no misfires at all.

With MAF connected the boost pressure is lower than expected at 0.7bar, peeks at 1.2bar drop to 0.7bar holds there and drops to 0.5bar at rev limit.
The car is running very smooth on idle and driving.
Boost meter shows at idle -0.7bar.

What could be the cause?

Boost is always gonna drop off towards the rev limit as the turbo can't flow enough air to keep up.

Depends what boost the map is asking for, you can log actual boost vs requested boost. I think it's group 115, but other than that sounds pretty healthy to me.

 

[nd-photo.nl]

Same here, my stage 2 with 261bhp 395Nm was peaking at 1.3 bar (stock k03s turbo). But best way is to log it like @mty12345 mentions

 

[AceD909]

Boost is always gonna drop off towards the rev limit as the turbo can't flow enough air to keep up.

Depends what boost the map is asking for, you can log actual boost vs requested boost. I think it's group 115, but other than that sounds pretty healthy to me.

Same here, my stage 2 with 261bhp 395Nm was peaking at 1.3 bar (stock k03s turbo). But best way is to log it like @mty12345 mentions

Yeah, the boost drop at rev limit is fine, but why it has lower requested boost?
Actual boost is pretty close to requested.
Before it was 1.2bar peak drops to 0.9bar(which is stock for BAM) and on rev limit will drop to 0.7bar.
I will do some logs, ME7Logger or VCDS i can provide both if needed

 

[mty12345]

Yeah, the boost drop at rev limit is fine, but why it has lower requested boost?

ECU will reduce boost if you have knock, high EGTs or something else it's not happy with.