Question about 2006 Volvo S40
It is possible that your fuel regulator is leaking.
On the throttle assembly, there should be a few vacuum hoses attached. Pull those off and shake it a bit to see if there is any fuel coming out of it.
If it is...there should be an updated fuel pressure regulator.
Also you should replace the Idle Air Control Valve which is located near the front to bottom side of the throttle assembly.
When the fuel pressure regulator leaks, it causes a rich mixture and also damages the Idle Air Control Valve.
Both of which I have seen cause a hard start, lack of power, and blue smoke.
One more thing to look into are a set of coils, wires and plugs.
I've seen the coils get hairline cracks which causes the electricity to fire the spark plugs to arc out and not fire off the plugs efficiently, which ultimately causes lack of power and blue smoke.
Posted on Nov 10, 2008
Sounds like the fuel mixture is way off (gas to air ratio being fed to the engine). The mixture is probably way too rich (too much gas). I'm sorry I don't know much about Volvos, this could be a sensor that has failed and is causing the wrong fuel mixture, or an adjustment of a metering screw. So, yes, I agree it's a fueling issue, sorry I can't provide more info. countrycurt0
Posted on Aug 04, 2008
a 6ya Mechanic can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repair professionals here in the US.
click here to Talk to a Mechanic (only for users in the US for now) and get all the help you need.
Posted on Jan 02, 2017
Tips for a great answer:
Nov 28, 2015 | Cars & Trucks
Sep 27, 2017 | 1998 Mazda 626
Apr 19, 2012 | Cars & Trucks
Oct 30, 2017 | Toyota 4Runner Cars & Trucks
Oct 19, 2009 | Renault Sport Cars & Trucks
Apr 21, 2009 | 1992 GMC Sierra K1500
Jul 20, 2008 | Nissan Pathfinder Cars & Trucks
446 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: