Jerking Peugeot symphony auto-sleeper

Hi just bought a 1996 peougot boxer 1998cc petrol autoslleeper.  When I get warm it starts jerking if running out of fuel and it start to idle very roughly increasing/degreasing speed  (hunting). I am complete novice and be thankfully for any help suggestions .Paul

Hi Paul, welcome to the forum.  
I think your problem might be the idle stepper motor, look here:
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BTW. It would be good if you could tell us a bit about yourself in the introductions section, you may get better responses to your queries if you do  

Frank

Thankyou and will do

Would this stepper motor cause the van to * Inappropriate Word * when driving ,it only seems to happen when van warmed up .thanks

Sorry not sure why the phase inappropriate word has appeared. The van runs when warmed up then dies for split second ,which is getting much worse

Dirty fuel or water in fuel? Was it standing for a while before you got it? The idler stepper Frank mentions is more likely though.

Plynch2002 wrote:Sorry not sure why the phase inappropriate word has appeared.

the forum software thinks you've said a rude word.

The van runs when warmed up then dies for split second ,which is getting much worse

A rough gist of the idle system:
The idle system is not controlled by the throttle butterfly, but by a cone which is moved in or out of a bypass orifice in the inlet manifold, thus making it larger or smaller to control the amount of air going into the engine.
When the engine is cold and on "fast idle" the cone is pulled back, out of the way, but when the engine is at operating temperature, the cone is almost blocking the bypass off. If the stepper motor sticks, it doesn't react fast enough to keep the engine going when the butterfly closes.

It might not be the stepper motor, you need to read the whole thread.

Frank

Thanks for your replies ,is a manual available for this vechicle .in book form not cd as I use a ipad

Sorry to be thick is the stepper motor the part where you have a connection going into the top of it and a connection plug in the bottom of it looks as if has small round bowl at base.thanks for all help

Looks like this when it's out:
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Only one connector plug at the bottom.
Only paper book that I know of is the Peter Russek one and they ain't too detailed about the fuel system.

Frank

The only manual available for these Boxers is the Russeks.....

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they are not great but there is no other.

Ok think I,m looking at wrong part is it fitted to engine block on lad as you looking at it

Please look at the photo in the thread I gave you the link to.

Frank

Ok have Thankyou ,only bought van last weekend and it is my only transport for work as well .on driving van back from north wales about 60 miles away from where bought privately ,it went ok for about 30 miles and then it was if it was skipping a heartbeat. This just got worse as we travelled home .next day checked air filter which was ok ,checked plugs which were sooty .on a short run van ok,took van about 20miles down motorway same problem again .Paul

If the plugs are sooty after a decent run then it sounds like a fuelling problem - running too rich. Could be one (or more) of a host of problems, Air temp sensor, lambda sensor etc. etc..
How good are you at diagnostics & repairs?

Frank

Used to work on cars when younger .i have the basis ,can these sensors be disconnected one by one to show which may be faulty .thamks again for your help .also if it's a sensor will van completely breakdown on me

Hi frank .have reply to your message from my mobile not sure if you received it .

'Fraid not Paul.

Frank

Will try again .Frank

Paul

I would just like to thank Frank for all his time and effort in helping me

Hi all.  I've revived this old thread because the 'missed heartbeat' symptoms are precisely the problem we have with our 1998 Symphony.  It has been to our local garage four times now trying to resolve it but so far to no avail and the problem has now stopped us from using our van.  I've been reading about the problems associated with faulty or sticking Stepper Motors and this does seem to chime with the problems we're having.

May I ask, Plynch2002, if your problem was resolved and, if so, what was it?  We're at our wits end now so any help will be very gratefully received.

Thanks in advance

Paul

Psychology hasn't been on the forum since 2014.

I did wonder.  Thanks Paul.  I'll suggest the stepper motor next time the van is in the garage - because I know there will be a next time!

Paul