October 21, 201411 yr There's no predicting when it will happen. I've tried to cause it by stopping short and by easing to a stop. Any advice appreciated.
October 21, 201411 yr IACV hose under the intake might be loose. was any work done before it began this behavior?
October 21, 201411 yr No IACV hose on the 99. The Idle Air control valve is bolted direct to the side of the throttle body and that style valve is known to gum up and stick. Remove the valve and clean it, as well as the bore inside the throttle body where the valve cone sits. This may remedy the problem temporarily. Usually this style of valve just needs to be replaced, but it only takes a few minutes to clean it and see if that makes a difference.
October 24, 201411 yr When was the last time this had a tuneup and a timing belt changed. Any CEL on?
October 24, 201411 yr Ignorance ius fine, it can tell us a lot. Check engine light. Go crack open the owners manual it will explain it there.
October 24, 201411 yr Author When I first start the car, the CEL goes on until I give it gas; then it goes off right away and doesn't come back on.
October 24, 201411 yr You do know your timing belt was supposed to be changed at 106,000 miles, otherwise you can end up doing serious engine damage?
October 24, 201411 yr Author I will check with my mechanic re: the timing belt. Could it be causing the problem?
October 24, 201411 yr Whether it is or isnt, it is not an optional thing to do, it must be done, along with thw water pump, seals, and Tensioners. It is possible, and if it is that worn STOP DRIVING IT NOW. Continuing to use it is the differnce between a 750-900 dollar repair and a 2000.00 repair. It can also be spark plugs, filters, wires, which also need to be replaced regularly. I am also afraid to ask, but are you the original owner? how oftne is the oil changed? DO you check the oil level?
October 24, 201411 yr Author I am the original owner, the oil is changed religiously every 3000 miles and I trust my mechanic. Thanks for your suggestions. I appreciate your advice.
October 24, 201411 yr Ok a few things. Oil change interval is 7500 miles, I tend to do it every 5000 miles, if your ok with 3000 miles so be it You are seriously overdue for a timing belt job, including water pump, oil seals and idler and tensioner. This is a very very expensive repair if not addressed like yesterday. Also you are way more over due for tuneup, plugs, wires, and PCV valve. Air filter too. Any and all can cause what you are seeing.
October 24, 201411 yr Open and read your owners manuals! Get a Subaru Mechanic I was trying to be nice, but now your going to have spend a chunk of change to make this car right, through no fault of its own.
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