PaulL

In France over the weekend I found a new "feature" of my MY99. If accelerating (quite hard) in 5th Gear from around 70mph to about 90mph (ish) I could feel a slight judder from the car.
It was a bit like the judder you get with wheel spin when pulling away from a standstill.

Any clues?

Paul L

MorayMackenzie

The martians failed in their attempt to kidnap you because you were going to quick for their tractor beam to lock on?

PaulL

btw, if anyone fancies driving on a piece of billard-table-smooth tarmac, the dual-carriageway in France from Calais up to the Belgian border is excellent.

Paul L

leaskc

PaulL

I had this (or something similar) last year in France in my MY98, using SUL petrol.

Sounds like it might be the "Overboost" problem - search the BBS, there was loads of discussion at the time, IIRC...

Cameron

Nico van Steen

I noticed the same last night. No problems nailing it in 4th gear, but in 5th at that speed (around 3000rpm)is lightly stutters. My MY99 is modded with a chip, Ramair filter and a full SS exhaust sytsem (dp/ms/bb). I allways use 98RON. Will have a boost meter installed shortly to have a permanent view on boost.
I never noticed this untill last night. I had to get petrol from a different brand (Texaco) instead of Shell that I normally use.

Nico van Steen
Netherlands

bob

The overboost problem is not a slight judder. The engine shuts down for a split second you are thrown forward your heart skips a beat. It has been described as hitting a brick wall and never a slight judder.
Moray/ Nice one.

PaulL

From the descriptions here, definitely not an "over-boost" problem.

I get the feeling that it could be down to fuel.

This is the common denominator between me and Nico van Steen - the last place I filled up was in the Netherlands the day before (funny though Nico, could have sworn it was a Shell station!?).

Thanks for help guys

Paul L

Nico van Steen

Paul,

I allways use German Shell... maybe that makes a difference

Nico van Steen (living in a small village on the border to Germany)

Diablo

Sounds like what mine does.

Have a look at this:

PaulL

Mmm - I'd definitely describe the judder as more of a vibration through the transmission than a surge from the engine.

As I said, I feels similar to the judder you get if you pull away from standstill too aggressively and get wheelspin.

I'm not too worried - more intrigued. Only noticed it when abroad - never noticed it before or since in the UK.

Paul L