MK5 Golf GTI

All Things Mk5 => How to Guides / Troubleshooting => Topic started by: Phillyf21 on July 04, 2019, 10:08:17 AM

Title: Odd boosting issue at WOT, help please?
Post by: Phillyf21 on July 04, 2019, 10:08:17 AM
Hi all,

I'm experiencing a strange boosting issue with my Shark stage 1 TFSI. When planting my foot i'm not getting full boost, this is not every time but 80% of the time. Funny thing is if I build the revs up at say half throttle at around 2.5k rpm I'll get a little kick of boost then if I plant my foot I get full boost all the way through the range.

I need to log requested v actual boost in VCDS but my laptop is broke.

I'm thinking the turbo is on the way out as its still on the original at 126k miles. Also the diverter has been changed not 10k miles ago to the Rev D.

Thoughts?
Title: Re: Odd boosting issue at WOT, help please?
Post by: Shamm on July 10, 2019, 08:02:22 AM
Have you checked if any pipes are loose, i had the same issue the clip for the intercooler pipe sheared off
Title: Re: Odd boosting issue at WOT, help please?
Post by: Pudding on July 19, 2019, 07:16:20 PM
Hi all,

I'm experiencing a strange boosting issue with my Shark stage 1 TFSI. When planting my foot i'm not getting full boost, this is not every time but 80% of the time. Funny thing is if I build the revs up at say half throttle at around 2.5k rpm I'll get a little kick of boost then if I plant my foot I get full boost all the way through the range.

I need to log requested v actual boost in VCDS but my laptop is broke.

I'm thinking the turbo is on the way out as its still on the original at 126k miles. Also the diverter has been changed not 10k miles ago to the Rev D.

Thoughts?

Definitely need to log the usual ECU channels.

If the turbo was gone you'd get a lot of noise from it and bugger all boost.   Sure, it may not be quite as healthy compared to brand new but they either work or don't, so focus your attention on the logging first.