Vectra B Overrevving

  • Thread starter Thread starter HarrySasso
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HarrySasso

Hi I have a X18XE1 engine Vectra B. The problem I have is from pulling
away the acceleration is sluggish and jerky then all of a sudden it
grabs and revs and takes off and I have to put the clutch in and let of
the gas to control it.
This occurs up to 15 mph after that its all fine.
I've not got any engine management lights on and I've taken off the air
intake and can see that the butterfly valve is not sticking.
Any ideas?
TIA
 
accelerator position control sensor [pot]?
idle control valve needs cleaning?
if fitted

mike
 
Mike,
Thanks for the response, what and where is the accelerator position
control sensor please?
accelerator position control sensor [pot]?
idle control valve needs cleaning?
if fitted

mike

HarrySasso said:
Hi I have a X18XE1 engine Vectra B. The problem I have is from pulling
away the acceleration is sluggish and jerky then all of a sudden it
grabs and revs and takes off and I have to put the clutch in and let of
the gas to control it.
This occurs up to 15 mph after that its all fine.
I've not got any engine management lights on and I've taken off the air
intake and can see that the butterfly valve is not sticking.
Any ideas?
TIA
Click to expand...
Click to expand...
 
HarrySasso said:
Hi I have a X18XE1 engine Vectra B. The problem I have is from
pulling
away the acceleration is sluggish and jerky then all of a
sudden it
grabs and revs and takes off and I have to put the clutch in
and let of
the gas to control it.
This occurs up to 15 mph after that its all fine.
I've not got any engine management lights on and I've taken off
the air
intake and can see that the butterfly valve is not sticking.
Any ideas?
TIA
Click to expand...

My guess would be a shagged EGR valve. Get the fault codes read,
either with a proper fault code reader, or by using the paper
clip method, then post the codes back here.

Rgds, Sean
 
Thanks, will there only be fault codes if the engine light is on or can
they occur without the light coming on?
 
Thanks, will there only be fault codes if the engine light is on or can
they occur without the light coming on?
 
HarrySasso said:
Thanks, will there only be fault codes if the engine light is
on or can
they occur without the light coming on?
Click to expand...

Fault codes can be logged without bring on any warning lights.
When a warning light *does* come on, it usually means that a
faulty component is actually causing a problem of enough
magnitude, the ECU reverts the engine running into either a
default mode (back to factory settings for learning adaptive
ECUs) or a safe mode (sometimes called limp home mode).

Be aware there a two different types of codes, and not all
equipment can read all codes.

Of the two different types of codes, there are the *generic*
EOBD/OBD2 codes, which are the same whichever make or model of
car generates them. These were the ones which the EU legislation
ruled should be accessible to non-franchised servicing agents.

The second type of codes are the more detailed manufacturer
specific codes, which, as the term suggests, are unique to the
manufacturer. Obviously, major manufacturers have more than one
brand in their inventory, so GM will have Vauxhall, Opel, Holden
& Saab, and VAG have Audi, VW, Seat, Skoda, Lamborghini, Bugatti
& Bentley - and so you can see an Opel code will be the same as a
Vauxhall code.

If you do try the paperclip method to pull the codes, these will
only be the generic EOBD/OBD2 codes, you may still need a Tech2
test, but I have usually found the paperclip codes to be accurate
enough on Vauxhalls. When you do pull the codes, post 'em here
so we can help more.

Rgds
Sean
 
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