erratic idle on 2001 Volvo S60

WHEN I START MY S60 2.0 turbo IT IDLES ERRATIC THEN SMOOTH THEN YOU HERE A CLICK AND IT IDLES ERRATIC AGAIN AND IT KEEPS DOING THAT IDLE SPEED BUT DRIVES SMOOTHLY BUT WHEN I STOP AT SAY A TRAFFIC LIGHT IT STARTS IDLING ERRATIC AGAIN CAN ANYONE HELP THANKS

by in Ashford, CT on August 02, 2011
1 answer 3 comments
ANSWER by on August 02, 2011
you more than likely have a vocume leak or a frayed air hose: at higher rpm, the engine develops enough suction to intake manifold to run smooth enough but at idle its not sustainable so irratic condition and stalls.
COMMENT by on August 04, 2011
WHERE WOULD I LOOK FOR A VACUME LEAK THANKS
COMMENT by on August 04, 2011
most common vac leak is in or around air/intake hose area. a good visual solves most problems, you may even hear the hiss!!!!
COMMENT by on August 05, 2011
dont seem to be any leaks around the air inlet but what i have noticed is it idles okay but if i switch on any electrics or turn the power steering it idles erratic for a coulple of seconds and goes back to normal what do you think
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