JitLee

Kevin, it is a 2.5L engine

I'm going through the invoices from the repair shop: 08/05/04 - code# PO328 - the guy replaced the knock sensor 08/02/04 - code# PO328 knock sensor, code# PO442 evap small leak, code# PO130 oxygen sensor the O2 sensor was replaced in December 2003

My husband owns a 2000 Subaru Impreza with 55,000 miles, and for the past month and a half, the check engine light has been lit. The engine sounds like it's going to die. it's coughing and hacking; and sounds like it's going to stall. When you step on the gas, nothing happens for a couple of seconds, and then the car picks up speed all of a sudden. I swear, it feels like the gas is not getting to the engine. We've brought it in to 3 different mechanics, and each time, something different is replaced, the car will run ok (not fine, but not as bad as it was) for a week, and the problem will return. the check engine light has started flashing this past week, and we're really concerned because no-one seems to know what is wrong. Suggestions range from the idle valve to the knock sensor. I've read somewhere that the solenoid is a problem with this type of car, but the thing has been replaced twice in the last year. We're going out of our minds; every time we pay for repairs we think the problem is fixed, and two days later it comes back worse than ever. Please help!!!