Hi guys,

New to Volvo's and new to the forum

Just bought the wife a 99 V40 2.0T SE, looks to be in mostly good condition, few little things to fix up, but one strange problem is when cold it starts fine but then stalls after a couple of seconds. Holding the revs around 2000rpm for a few minutes until it's warm and it seems to be OK then, but while warming up every say 5 to 10 seconds it hesitates and wants to stall. Keeping the revs up keeps it running.

Now I'm not sure whether this is related or not but I noticed this sensor hidden away under the fuse box. I can't see anything that it would connect into, but obviously it does as it has an o-ring seal.



It looks like this must be where it mounts on the firewall;




I've been searching Google for engine bay layouts to try and identify this with no luck. Looks like it's either a MAP sensor or 'Altitude' sensor. But not sure where it connects to? Can anyone shed some light on what this is please? Also any ideas on the cold engine stalling issue?

Thanks for reading

 

Well after researching this all night, I still haven't clearly identified the sensor, it's either a MAP sensor or a Barometric sensor (why does it have a barometric sensor?).

But it looks like my stalling problem may be either the fpr or the IAV. will check them both tomorrow.

 

Managed to find the problem. Was a broken vacuum hose on the manifold, once fixed starts and idles perfectly, seems to run a bit better today also. Nice to have an easy one