Author Topic: 52 1.8t AUM, hesitation, weird stutter after starting  (Read 153 times)

Offline Manford

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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.

Offline Manford

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Re: 52 1.8t AUM, hesitation, weird stutter after starting
« Reply #1 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.......

Offline Wazzzer

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Re: 52 1.8t AUM, hesitation, weird stutter after starting
« Reply #2 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


1999 1.8T: R-Tech remap - 225bhp/256lb/ft : K03s : THS FMIC : THS PCR pipe : 2.5" stainless exhaust : THS FR3 Engine mounts : G60/VR6 clutch : Calibra Yellow injectors : VR6 MAF : Devils Own WMI : Forge 007p : Carbonio CAI : Leon Cupra R Brembos : FK AK Street coilovers : Votex skirts : Anniversary front : click ---> http://www.golfgtiforum.co.uk/index.php?topic=92175

Offline Manford

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Re: 52 1.8t AUM, hesitation, weird stutter after starting
« Reply #3 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?

Offline Wazzzer

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Re: 52 1.8t AUM, hesitation, weird stutter after starting
« Reply #4 on: 17 October 2017, 19:00 »
Unfortunately it could be anywhere, some splits won't show up until you move the pipes about


1999 1.8T: R-Tech remap - 225bhp/256lb/ft : K03s : THS FMIC : THS PCR pipe : 2.5" stainless exhaust : THS FR3 Engine mounts : G60/VR6 clutch : Calibra Yellow injectors : VR6 MAF : Devils Own WMI : Forge 007p : Carbonio CAI : Leon Cupra R Brembos : FK AK Street coilovers : Votex skirts : Anniversary front : click ---> http://www.golfgtiforum.co.uk/index.php?topic=92175