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Model specific boards => Golf mk4 => Topic started by: beppe2672 on 13 November 2013, 03:38

Title: random judder
Post by: beppe2672 on 13 November 2013, 03:38

Hey guys, My 1.8t agu has developed a bit of a judder on acceleration and over run, usually happens around the 3500rpm mark, the car isnt throwing any fault codes up, I've also checked for boost leaks. I also never seem to be able to catch it while logging with vcds. No misfire counters either. Seems to happen more often when the engine is cold. When its warmed up it only happens occasionally when accelerating hard. Any ideas guys?     

Title: Re: random judder
Post by: dom on 13 November 2013, 08:23

Does it feel like it's down on power?

Title: Re: random judder
Post by: beppe2672 on 13 November 2013, 16:42

Nah its running fine, just wish it would throw up a fault to point me in the right direction, theres so many things it could be.

Title: Re: random judder
Post by: navmk4gti on 13 November 2013, 17:05

Does it judder slightly at idle when you just sitting there parked up?

Title: Re: random judder
Post by: beppe2672 on 13 November 2013, 17:41

It only does it under load, idle isn't exactly perfect, but i wouldn't sat it idles lumpy.

Title: Re: random judder
Post by: beppe2672 on 13 November 2013, 17:42

Was thinking it could be the n75 valve possibly. But I dont know how to check it without fault finding by substitution.

Title: Re: random judder
Post by: Wazzzer on 13 November 2013, 17:47

you got anyone to try an ignition amp off them? Might be breaking down under load. Also I don't think the misfire counter works on the AGU...

Title: Re: random judder
Post by: beppe2672 on 14 November 2013, 13:00

I'll test the ignition amp tonight then.

Title: Re: random judder
Post by: Wazzzer on 14 November 2013, 19:13

http://www.youtube.com/watch?v=YYpTwRYV1_I

Title: Re: random judder
Post by: beppe2672 on 15 November 2013, 12:43

cheers mate, bit easier than working from circuit diagrams!

Title: Re: random judder
Post by: Wazzzer on 15 November 2013, 14:53

works a treat too :afro: