Hey everyone,

My wife has a 2002 Volvo S40 1.9T that was in a front end accident a few weeks ago. After we got the car back from the body shop I noticed the Idle Air Control Valve's connector was cracked. I told the body shop and they replaced the part. Now, every once in a while (every few days) the car will stall when coming to a stop. The car just idles down a shuts off (very smoothly). I checked for vacuum leaks and all of the wiring harnesses in the area of the body work. Nothing out of the ordinary was found. A snap-on smoke machine was used to check for leaks.

Here is a list of the items that were changed:
-New vacuum pump (for brake booster)
-New IAC
-New front wheel ABS sensor
-New headlamps
-New intercooler
-New Radiator
-New hood

If I tap the gas pedal lightly, the idle goes up a little then drops to almost stall levels than evens out again. The car has the ABS and DSA light on due to a faulty ABS module (got the part to replace soon). It is almost as if the transmissions doesn't disengage fast enough when coming to a stop causing the stall. Any suggestions?

 

Was the fuel pressure regulator or it's attached vacuum hose also changed or damaged? It's located right above the IAC so I'm thinking maybe it suffered some damage too? Just a guess.