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Model specific boards => Golf mk4 => Topic started by: Manford on 05 October 2017, 20:31

Title: 52 1.8t AUM, hesitation, weird stutter after starting
Post by: Manford on 05 October 2017, 20:31

So I fixed the second air pump at the weekend and now when the car starts after couple of secs it kinda judders and then is fine

I’m also finding a hesitation/miss between 1500-2000 rpm. When under load at low rpm I get like a chirpy noise, I’m assuming I’ve got a leak somewhere?

I have no engine lights, no error codes via vcds.

Title: Re: 52 1.8t AUM, hesitation, weird stutter after starting
Post by: Manford on 12 October 2017, 12:41

Update - Cleaned throttle body and maf.....seems much better now.

Still get weird noise / chirp when under load at low rpm.......

Title: Re: 52 1.8t AUM, hesitation, weird stutter after starting
Post by: Wazzzer on 12 October 2017, 19:02

Would say it's an air leak somewhere mate, check all the pipes from the carbon canister right through to the ones going to the actuator

Title: Re: 52 1.8t AUM, hesitation, weird stutter after starting
Post by: Manford on 17 October 2017, 16:27

I can hear the carbon canister clicking away...I thought it was going to be a leak somewhere was hoping for a quick way to find it, but do you think it's more likely on the bigger plastic stuff than the little vac lines?

Title: Re: 52 1.8t AUM, hesitation, weird stutter after starting
Post by: Wazzzer on 17 October 2017, 19:00

Unfortunately it could be anywhere, some splits won't show up until you move the pipes about