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Car Forum / Jaguar Cars / May 2004

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XK8 Engine safety mode

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Nick - 16 May 2004 18:20 GMT
Razzing around in my XK8 I am getting a problem. It can start to drive in a
very jerky fashion, and the gears are unsure of where to be. A light comes
on the dash saying engine failure safety mode. I have taken it to the garage
and they have plugged in the diagnostic and come up with nothing. He said
its probably dirt in the air inlet and so cleaned it out for me, it was okay
for a day and is doing it again. If I put my foot down then the problem
disappears.

Any ideas or similar problems

Nick

--
Nick Bennett buys 007 memorabilia
The Biggest Online Bond Collection  @  www.jamesbondtoys.co.uk
DieInterim - 17 May 2004 06:06 GMT
> Razzing around in my XK8 I am getting a problem. It can start to drive in a
> very jerky fashion, and the gears are unsure of where to be. A light comes
[quoted text clipped - 7 lines]
>
> Nick

Sounds like a possible TPS issue. <Throttle position sensor> What is your vcm code?

DieInterim
Nick - 17 May 2004 16:01 GMT
thanks, whats a VCM code?

Nick

--
Nick Bennett buys 007 memorabilia
The Biggest Online Bond Collection  @  www.jamesbondtoys.co.uk
> > Razzing around in my XK8 I am getting a problem. It can start to drive in a
> > very jerky fashion, and the gears are unsure of where to be. A light comes
[quoted text clipped - 11 lines]
>
> DieInterim
DieInterim - 18 May 2004 03:17 GMT
> thanks, whats a VCM code?

Big oops!

The xk8 does not have The "vehicle control monitor". Any codes that
you might have can only be deleted by the dealer. Codes can be
retrieved using an interface tool found at many part stores, however,
the dealer can usually diagnose your fault codes for about 50- 60 us
dollars. The VCM was a great tool found in older Jags, so much so that
FORD ommited these in later models.<g>

Jerky driving is typically caused by the TPS as I mentioned earlier,
as well as a transmission temp sensor. ....Sometimes it is worth the
expense of having a dealer diagnose your issues because of the fact
that they do everything possible to prevent you from knowing what the
problem is.

Funny thing is that the US government has passed laws making diagnosis
easier, but I have yet to see them enforce this. I suppose it is the
same the world over.

Sorry,

Blake
Kevin Killebrew - 18 May 2004 17:10 GMT
Sounds just like an XJ8 that's showing "Restricted Performance."  Mine
turned out to be the mass air flow (MAF) sensor.  If it thinks your car is
exceeding emissions standards it puts you into limp home mode.  The
dealership had a very hard time diagnosing it.

KK

> Razzing around in my XK8 I am getting a problem. It can start to drive in a
> very jerky fashion, and the gears are unsure of where to be. A light comes
[quoted text clipped - 11 lines]
> Nick Bennett buys 007 memorabilia
> The Biggest Online Bond Collection  @  www.jamesbondtoys.co.uk
 
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