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Model specific boards => Golf mk5 => Topic started by: 5aq1b on 18 April 2008, 09:24

Title: Few engine niggles?
Post by: 5aq1b on 18 April 2008, 09:24

Got my car remapped around 3 wks ago, and have noticed a high pitched whining noise when i accelerate, and it goes away when i decelerate, almost like a police siren but nowhere near as loud!  Reckon this has anything to do with the remap?

 

Also noticed today the smell of diesel when i was sitting stationary in traffic.  Definitely not from other cars as i smelt it when i was stationary in the car park with no other cars around me!

 

Any ideas?

Title: Re: Few engine niggles?
Post by: Phil mcavity on 18 April 2008, 09:28

ok hi and welcome, but plz can you be abit more specific? what model car is it?  id be worried if you have a GTi with a diesel smell for starters! :wink:
If this smell has just started, and this high pitch whine has started, id be back on the phone to the re-mappers straight away. How old is the Car?? under vw warranty??

Title: Re: Few engine niggles?
Post by: 5aq1b on 18 April 2008, 10:25

It's a 2005 GT TDi, remapped from 140bhp to 175bhp.

Ta!

Title: Re: Few engine niggles?
Post by: Komenda on 18 April 2008, 13:11

Possible fuel pump or injector problem by what you describe. What sort of mileage has the car done?

Title: Re: Few engine niggles?
Post by: 5aq1b on 18 April 2008, 13:20

36,000 miles so not alot

Title: Re: Few engine niggles?
Post by: Komenda on 18 April 2008, 13:32

Maybe they got the fueling wrong when they did the map. Might be an idea to take it back to them as your first point of call. Hopefully a simple fix.

Title: Re: Few engine niggles?
Post by: 5aq1b on 18 April 2008, 13:37

have been told by them that the remap would not cause the problem but could exaggerate it.  Have been told by them to get to a garage and have it checked out and to let them know of any fault code that appears.  Says that no fuel passes through the turbo, as the whining noise may be hte turbo

Title: Re: Few engine niggles?
Post by: Komenda on 18 April 2008, 13:42

Air and oil only for the turbo. Your fuel pump may of been on its way out and the extra work has pushed it over the edge.

Title: Re: Few engine niggles?
Post by: topher on 18 April 2008, 13:47

High pitched whining most likely the turbo - you hardly hear it when running standard boost pressure.

The smell - had you just pulled into the carpark? Been on a bit of a lively run? Unburned fuel in the exhaust maybe.

Title: Re: Few engine niggles?
Post by: 182_blue on 18 April 2008, 13:57

As above, you sure its not just the turbo spinning up, it can sound louder after a remap

Title: Re: Few engine niggles?
Post by: Hurdy on 18 April 2008, 17:24

Ah, this is possibly the infamous "owl" noise that some owners complain of. I had the same kind of noise when I had my TDI140 mapped and although it was a bit annoying, it wasn't a fault as such. As for the Diesel smell, this too became more apparent after the remap. :nerd:

Title: Re: Few engine niggles?
Post by: 5aq1b on 18 April 2008, 17:55

Just popped the bonnet open and noticed some splashes around the engine oil cap.  Also the part where the bonnet touches the engine was also moist looking.  Will maybe upload some pictures?

Title: Re: Few engine niggles?
Post by: stevieC on 19 April 2008, 21:51

Quote from: 5aq1b on 18 April 2008, 09:24

Got my car remapped around 3 wks ago, and have noticed a high pitched whining noise when i accelerate, and it goes away when i decelerate, almost like a police siren but nowhere near as loud!  Reckon this has anything to do with the remap?

 

Also noticed today the smell of diesel when i was sitting stationary in traffic.  Definitely not from other cars as i smelt it when i was stationary in the car park with no other cars around me!

 

Any ideas? My dad had this police siren sound comming from his bora 150tdi and it needed a new turbo. :sad: