Help needed

[Sammy14913]

Hi all I've been looking on a few owner club site but still can't solve my problem... I know you have probably herd this time and time again but it's worth a try basically I got another mk4 gti t but only to find out it's a arz with a agu head not a problem apparently... Basically since the day I got it it's been boggy/misfiring up to 3k revs in every gear I've changed maf sensor, spark plugs ,coil packs , n75 valve to a new s3 n75 the diverter valve to the tt one witch is apparently stronger the rear lambda new fuel filter oil and oil filter , got it plugged into vagcom and there is no fault codes on now and no lights on the dash but yet the problem is still ther and its over fuleing by the smell of it as well

[Wazzzer]

get some pics of the engine bay, inlet manifold and the area around the injectors. The injectors are different between the AGU and ARZ so hopefully nothing has been bodged. It won't be a good idea running a large port head with a small port inlet though...

[Sammy14913]

I think everything is arz apart from the head how do I post pics on hear and I'll do it now for you to have a look at

[Sammy14913]

Would the pcv cause these problems

[Wazzzer]

If the PCV is leaking it will run poorly yes

[Sammy14913]

This cars beginning to become a headache .. As the revs dropped it popped a few times so think might be blowing from exhaust manifold like a failed gasket

[Sammy14913]

Do you think a map will sort it out

[Sammy14913]

I'm starting to think the whole engine is agu would that cause the problem a agu engine running off a arz ecu

[lemski]

Shouldnt do if all the sensors and such are plugged in. The engines are the same its just sensor differences at the most.

[Sammy14913]

The agu head has bigger ports so fort the air/fuel mixture would be different plus it's running rich as well...I'm Gona give up on this car soon I'm starting to loose my cool with it I can't see how there's no fault codes and its misfire: bogging at 1.5/3k revs