Boy, that sure sounds like a cracked air tube. That is REAL common on Probes. Instead, check for a vacuum leak in one of the smaller hoses. Try pinching them off at various places to see if the engine smooths out.
You can also try introducing a little propane through a vacuum hose. If that clears up the running problem, not enough fuel is getting in.
Monday, April 18th, 2011 AT 3:52 AM