If you just had the Timing belt replaced they probably changed your spark plugs and air filter. I'd check the connection on the MAF sensor. They may NOT have tightened the connection. It is the plug on top of the air cleaner housing. Just a possible thought. The problem sounds like a faulty MAF.
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'92 LSL TEAL 277,000 miles
Trans (on # 3) Engine (on # 2)
"NEW" VISORS
'03 Forester XS 214,000 miles
'05 Outback 3.0R
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