All Things Mk5 > How to Guides / Troubleshooting

Lurching under braking

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AJP:
Hi

I've noticed a few times that under moderate to hard braking, usually from mid to high revs, that the car isn't smooth in decelerating.

It's not a brake issue, more that the engine braking is a bit 'lumpy'.

I probably haven't described it very well, but I'm guessing it could be something like an engine mount - mass moving more than it should which affects the momentum of the car.

Sound familiar to anyone?

AJP:
Bump

AJP:
Got to bump this again, could do with a bit of info guys.

Mount? Flywheel? Something else?

Hope someone can at least offer an idea!

lukemk5gti:
Record it with a dash cam and put the video up... Very difficult to picture what you mean.

First thing came to mind was maybe your a.b.s.?

AJP:
Don't have a dash cam unfortunately.

It's quite hard to explain!

I'm 99% percent sure it's engine related rather than brakes though.

If I for example rev up to 4000rpm then lift off, the car slows smoothly under engine braking. But if I apply the brake under the same conditions, it's as if the engine can't adjust its revs in line with the foot brake - and staggers/lurches from say 4000rpm down to 1500rpm. Almost like the revs hang then suddenly drop, making decelleration lumpy. It takes a bit of fun out of the odd blast.

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