Advice issues :(

[ssbnumber34]

Right the story is i bought a nice low miles leon 180 but when i took it for a remap my tuner noticed it had an agu engine in it seems to drive nice but felf sluggish, gave 165bhp on the dyno so they put a map on it and back on the dyno and it just keeps cutting the throttle when it starts making boost,,, anyone have any ideas? as gonna try again thursday and they will have a good look over it but any suggestions would be great

 

[Ronin225]

Is it just the bare engine that's been transplanted??

 

[ssbnumber34]

Is it just the bare engine that's been transplanted??

Thats the problem, mate i really don't know, never had one before but always wanted one and found a nice one with 70k on the clock so obviously i'm a little annoyed to say the least, i'm assuming there was an engine problem and it was replaced or maybe just the head replaced? on searching though there seem to be a few differences like the cam sensor and n249 not being fitted to the agu engine,,, the car drives ok but the dyno graph is all over the place

 

[Ronin225]

It maybe a blessing if youre planning on modding it as the AGU head is largeport
I would guess the bare engine has been transplanted for a failed one
Are there any fault codes flagging when the throttle closes?

 

[J.B.]

Do you got something like this on the dyno?

Because there are sensors that measure different in a AGU engine dan in other 20vt engines. Vibrations in the AGU are different and that has to be changed in de amk (?) ECU

 

[ssbnumber34]

Do you got something like this on the dyno?

Because there are sensors that measure different in a AGU engine dan in other 20vt engines. Vibrations in the AGU are different and that has to be changed in de amk (?) ECU

It did look a lot like that graph actually mate, didn't get chance to fully investigate any further as the guy that tunes for me was very busy so he put the standard map back in until he had more time which is why i wanted to know if anything could be at fault before i take any more of his time up

 

[ssbnumber34]

It maybe a blessing if youre planning on modding it as the AGU head is largeport
I would guess the bare engine has been transplanted for a failed one
Are there any fault codes flagging when the throttle closes?

Didn't get chance to scan for codes but will do when i take it down on thursday, when on the dyno i thought he was logging stuff and rolling the throttle then back on until he told me he was doing it himself, he did say it seems very strong though so could be very nice when its done

 

[ssbnumber34]

When he scanned it he said there are no fuel trims though? what does that mean exactly and what would cause it?

 

[J.B.]

The un smooth line had to do with de pingel sensors. The AGU vibrates different than a AMK, AUQ or other new 20VT engines.

The exhaust sensor is linked on the n112 or n249 sensor. You need to place a sensor to one of those so the exhaust sensor will work again. But the AGU engine has no n112 or n249 so you need to check if you have any lose connectors.

 

[ssbnumber34]

The un smooth line had to do with de pingel sensors. The AGU vibrates different than a AMK, AUQ or other new 20VT engines.

The exhaust sensor is linked on the n112 or n249 sensor. You need to place a sensors to one of those so the exhaust sensor will work again. But the AGU engine has no n112 or n249 so you need to check if you have any lose connectors.

There are some wiring connectors behind the drivers side headlight that are not plugged in and one that should be connected to the cam sensor? What would I need to fit to the 02 sensor then ? The little vaccuum pipe that should go to the n249 as blanked off.

 

[nd-photo.nl]

The n249 should be physically connected for the lambda to work. I had this issue not too long ago, when logging we saw the lambda doing nothing? I just plugged it in (no hoses etc attached) and lambda worked again.

 

[ssbnumber34]

The n249 should be physically connected for the lambda to work. I had this issue not too long ago, when logging we saw the lambda doing nothing? I just plugged it in (no hoses etc attached) and lambda worked again.

Mmm don't think there is even one still fitted ? Where does it sit and where will the wires be roughly ?

 

[J.B.]

I can make a photo tonight for you. I thougt the wires come from the right side of the engine.

 

[ssbnumber34]

I can make a photo tonight for you. I thougt the wires come from the right side of the engine.

That would be great if you could mate thanks

 

[J.B.]

I can make a photo but it dont help i think. Because my whole cable is now bounded in the battery box.

But the cable comes from the right side of the engine near the battery box. From there it goes straight to the centre of the engine. Mine is taped together. I think there are 3 wires.

 

[ssbnumber34]

I can make a photo but it dont help i think. Because my whole cable is now bounded in the battery box.

But the cable comes from the right side of the engine near the battery box. From there it goes straight to the centre of the engine. Mine is taped together. I think there are 3 wires.

This is the only lead i can see thats not connected to anything on the right hand side, just wondering if the lambda is still fitted with the cable, as i had a quick look and there does seem to be plenty of cable thats been tied up but can't see for definate as i'll have to jack the car up and have a look.

 

[J.B.]

Thats it. This connector will also fit the N75 valve. (i've got my old n75 valve connected to it instead of the n249)

 

[ssbnumber34]

Thats it. This connector will also fit the N75 valve. (i've got my old n75 valve connected to it instead of the n249)

so i need to fit a n75 or n249 to this? what else do i need to do or is that it? do you think that will be whats causing the issue with it not like the remap?

 

[J.B.]

I think thats the only thing. Do you got some more pictures from the engine bay?

 

[ssbnumber34]

I think thats the only thing. Do you got some more pictures from the engine bay?

Yeah i can take some more mate what do you need to see? the car runs well but obviously down on power, my tuner was just confused why it says no fuel trims? he is great with these cars but obviously with it being a bit of a parts bin special we are working a little blind