[LCR] Boost issue

[Phil K]

Hello!

Sorry if this has been covered before but this is a problem that has been troubling me for a few months...

Basically, when driving on light throttle the boost comes in and occasionally drops back (normally when cold-ish) it kinda feels like an auto box changing up early if you see what I mean?

To start with this only happened when cold and in 1st gear but I have noticed a couple of times today it happens in 2nd and once warm too...

Like I say it is only when on light throttle but it's a significant drop off and I'm beginning to wonder what the cause is and what can be done to fix it?

TIA

Phil

 

[Feel]

Lots of "surging boost" threads over the years, some people put it down as a "characteristic"

 

[Stan 24v]

I think I get the same as you Phil.

 

[ringer]

same here if it makes you feel better

 

[bcstudent]

My LC was really bad for that before I started modifying it. I think the 007P and Forge TIP made the most difference towards fixing it.

Stan, if we do manage to meet up over Christmas I think you'll like the remapped LC feeling. My mate drives a standard Octavia vRS and he was pretty impressed.

 

[J@mes]

id say try a TB reset to see if that helps?! (worth a try!) )

 

[Timmyboy]

Mine was suffering from that until my re-map last Thurs, but unfortunately I had the map and a Forge 007P fitted at the same time so I'll never know which cured it (and a panel filter but, meh)

 

[Stan 24v]

Stan, if we do manage to meet up over Christmas I think you'll like the remapped LC feeling. My mate drives a standard Octavia vRS and he was pretty impressed.

Thats what Im worried about, more bloody money

 

[bcstudent]

It's a slippery slope...but what a great car it is now. I've never enjoyed driving until now

 

[skahigh]

mine does this too, i think my coil packs may be getting towards the end of their life so i guess this could have something to do with it?

 

[Stan 24v]

A dodgy coil pack would give you a miss on one or more cylinders mate, the symptoms are quite different, I know as Ive changed 2 on V6 engines!!

 

[traumapat]

just in case this helps.

my lc used to regularly surge at idle and when driving with light throttle. it would surge 300-400 revs. once the engine was warm it calmed down.

i tried everything. it was almost dangerous to drive.

turns out that moisture was building up in the maf connection causing arching.
hence the fluctuating maf readings causing surging revs.

di-electric grease from ebay blocks out the moisture. takes about a week for the surging to stop. well it did for me.
the tdi lot use it and theres a few threads on here.. i think they nicked the idea from the vw lot

 

[longman]

Mine suffers from the same problem from time to time.

I clean the Throttle Body with WD40, re-aligned it and reset the ECU and its perfect again. I seem to have to do that twice a year and it lasts 6 months.

I think is is a characteristic of the adaptave ECU and it just needs to forget what its learned every so often.

 

[skahigh]

A dodgy coil pack would give you a miss on one or more cylinders mate, the symptoms are quite different, I know as Ive changed 2 on V6 engines!!

I'm aware of the symptoms of a failed coil pack, I was implying that perhaps a coil pack on its way out might f**k up the timing of the sparks firing as opposed to them not firing at all.