ESP kicking in when going downhill

Pipsqueak

Registered User
as the title says. When driving along if I go down a dip or sudden hill in the road I can feel the power being cut slightly to the engine then back to normal after a second or 2. Anyone know what this might be? It's a commonrail 2.0 tdi dpf. Also it happens just in normal driving after a motorway run. Power just seems to cut in and out slightly while driving steadily along the road. Anyone else get this? Cheers
 

Sayam

Well-Known Member
VCDS Map User
Is it deffo ESP or could it be sticking turbo vanes?

What's the mileage on it?
 

Sayam

Well-Known Member
VCDS Map User

at 28k doubt it is the turbo mate, sorry i can't help further.

other advice i can give is check the VCDS map and get someone local to you to scan the car for fault codes maybe?
 

biscuit-a3

Registered User
Mi have the same thing on mine but only as going over the brow of a hill,

No DPF and remapped as well but did it before it's done over 100000


I would love to get to the bottom of this

I am in the trade and someone mention a future that cuts fuel when feels the gradient change as you don't need the power because your going down back but I can still feels this through acceleration it feels like I am
Quickly dabbing the brakes
 

Pipsqueak

Registered User
Oh no faults ever
It's just a bit of a pain. I was wondering if it's the throttle. Only had this car 6 months but have had a few A3s and never came across this before. Also been told it might be to do with the way the commonrail delivers the fuel.
 

manor13

Registered User
i have the same thought it was the abs reason being I had a previous car with a severe abs fault and this feels like but not as severe.
 

guile

Registered User
possible fuel cut as the fuel sloshes around in the tank due to change in grades, hills, dips etc?

totally fill your tank and try it again, also possible fuel pump issue?

just throwing ideas out there really, i know how annoying these issues are to resolve, good luck...
 

Pipsqueak

Registered User
possible fuel cut as the fuel sloshes around in the tank due to change in grades, hills, dips etc?

totally fill your tank and try it again, also possible fuel pump issue?

just throwing ideas out there really, i know how annoying these issues are to resolve, good luck...
Cheers
 

biscuit-a3

Registered User
It's not fuel in tank as its full

I'm going to turn my esp off and see what happens

Try it and let me know
 

Pipsqueak

Registered User
It's not fuel in tank as its full

I'm going to turn my esp off and see what happens

Try it and let me know
I've tried that. Hard to tell as it is an intermittent problem but will try again. Someone else mentioned a sticky turbo. Might try a turbo cleaner
 

biscuit-a3

Registered User
I don't think its my turbo

I'm a Vw specialist and have no dpf and heavily mapped,

The mapping would of sorted the Turbo out

It still does it,

I'm questioning a over excited yaw sensor and the brow of a hill combined with gradient it's confusing it,

Not had my car today so couldn't try no ESP

Will update shortly
 
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