Good evening,
We have recently bought a 2015 XKR-Dynamic and ever so often when you pull away it starts to judder,( if that’s the correct terminology].
It did it the day we picked it up, then it was ok for 3 weeks, then we were on the motorway when an injector failed, we thought it may be connected and the dealer also agreed.
We had a new injector fitted about 2 weeks ago, but it has started to judder again.
Any ideas???

 

Maybe a failing coil.

Maybe an air leak?

Or something loose that wiggles around and for some reason matters at that speed etc.

 

Any codes?

Only when you pull away from stop, or at low speed and lightly accelerating, 30/40 to 60/65mph??

Judder? Hesitation in moving forward?, Missing, and returns to normal as speed increased?

How many miles?

So many questions, so little time.

Was is a firm injector issue, code and down one cylinder with codes.
Could indeed be another one on the way out, Fuel, sitting with Ethanol in the system for a long time before purchase, etc.

(The terminology to be used is the best which describes the issues and problem you are having, also at the speed and conditions your are experiencing.)

A couple of threads, which both appear to go nowhere, but interesting nonetheless.

https://www.jaginfo.org/threads/aj13...tation.116906/

https://www.jaguarforum.com/threads/....129722/page-2

The reason I am interested, is that the previous owner of my XK-D R (2014 with 20K) experienced a( lets call it a) Hesitation on light acceleration. Took it to the dealers who diagnosed incorrect air filters.

Unfortunately, happened to me again, once in January after purchase, travelling when fully warm and gently accelerating from 35mph to 60mph to join a motorway. (no codes activated)

Would be most interested in an answer.

Seasons Greetings to you Yorkshirelass.

 

Judder from engine as in misfire/hesitancy or judder from brakes/suspension?

Graham

 

Hi bydand
It happens at low speed as I am accelerating, either coming out of a junction or pulling away in slow traffic, it jumps, judders, kangaroo hops about 5 or 6 times, once I’m up to 50+ it is ok.
19000 miles
Defo injector, it failed whilst doing about 80, was smoking, smelt and had fuel in exhaust.

Seasons greetings to you aswell

 

I had an injector failure in October 2 months ago on my 2014 XK Dynamic R. The bank of injectors were replaced (not single) under Jaguar Extended warranty. So you may want to check with the dealer. Leading up to it, the exhaust did smell of unburnt fuel and saw a minor dip in MPG, so you might want to check they have replaced the injectors and not just tried to clean them..

 

He told us he just replaced the failed injector, it isn’t Jaguar warranty, just the 12 months the dealer has given us.
My husband is going to call him tomorrow, we still have 10 moths wty left.
Trouble is it’s so intermittent AND it only happens when I’m driving it, not my husband, which is weird.

 

Shaking while first starting out is usually something to do with the drive shaft or axle shafts. Could also be the transmission. Just what everyone else says; not enough info and so many possibilities.

 

Any odd mechanical noises?

 

Crikey! Thats Juddering in the extreme.

I would imagine that would throw a code or two. 19K. So a long time in/on the shop floor waiting for the suitable owner.

I would suspect sticking injectors, since still under warrantee, record all instances and report back to the dealer as (You & Car) are not happy with what is going on.

Get them or someone to check for stored codes.

Kangaroo Petrol, remember it well.


They are very very nice Cars when driving well, so worth the effort to get it sorted out while under Warrentee.

 

Ah! The lead footed Husband.

Can you coach him to drive and accelerate, off as you do. This may give the desired result, as in the slow gentle increase in power and smaller increase in DI (direct injection) travel/flow which may indeed be the issue.

In that at the lower power/speed ranges the fuel injectors are sticking slightly and at least some are sticking and slow to move.

Just a thought.

 

Have the Jaguar main dealer inspect the gearbox and engine mounts.

 

Ah, yeah, engine mount. Hard acceleration will cause the engine to jump around. Mine jumped enough to tear the intake elbow where it goes into the throttle body.

 

[QUOTE=Cee Jay;2707012]Ah, yeah, engine mount. Hard acceleration will cause the engine to jump around. Mine jumped enough to tear the intake elbow where it goes into the throttle body.[/QUOTE

Gents,


We are talking about a young Lady slowly accelerating,

"It happens at low speed as I am accelerating, either coming out of a junction or pulling away in slow traffic, it jumps, judders, kangaroo hops about 5 or 6 times, once I’m up to 50+ it is ok.
On 19,000 miles"

Not Jacqueline Stewart!

 

I should read better, huh?

 

The "juddering" as you call it, does it happen when starting out in a straight line or is it when starting out and turning either left or right at the same time. Many of us have had that kind of "juddering" and it disappears as soon as you straighten out. Some have said that changing the differential fluid eliminated the problem. It did for me for a long time. I now have some of it back again, but remember I have 210,000 miles on my car now. It's not as frequent as it was nor as "severe." But it does happen. There are a number of posts about this if you search for them. And "juddering" as I recall was the term used for many of those posts.

 

Is this not the front tyres, scrubbing! As you turn either Left,.. or Right? Being rather wide, and gripping, and nothing at all to do with the differential?

I imagine the tyres are a little worn now, and do not grip, as they once did? So the scrubbing is somewhat reduced. Think about it.

Turning both Left and Right at the same time is only something a Woman can do with a certain amount of confidence, and practice. But yes it is possible.

As I have been repeatedly told.

 

Where do you feel it more? In the steering, seat, front, rear? Does it feel like tyres or does it feel like the engine's bucking? Any noises associated with the "juddering"?

 

[QUOTE=jahummer;2707708]
Where do you feel it more?
In the steering, seat,
front, rear?
Does it feel like tyres or does it feel like the engine's bucking?
Any noises associated with the "juddering"?[
/QUOTE]

Indeed English is a Funny Language Children...... Move on Now.

 

???