I've read all the posts reguarding hesitation and can't find anyone that has this problem. When I baby or feather the car (warm or cold) it runs fine. When I need to go up a little hill or really step on it the car hesitates badly and lately has been making a clunk or knock sound right in the middle up front right as it starts hesitating. The Service Engine Soon light isn't coming on. I have new plugs and wires, fuel filter, air filter, tranny serviced by subaru 2 months ago. I always run premium gas. I don't know what else to do. Anyone had this problem?

I've read all the posts reguarding hesitation and can't find anyone that has this problem. When I baby or feather the car (warm or cold) it runs fine. When I need to go up a little hill or really step on it the car hesitates badly and lately has been making a clunk or knock sound right in the middle up front right as it starts hesitating. The Service Engine Soon light isn't coming on. I have new plugs and wires, fuel filter, air filter, tranny serviced by subaru 2 months ago. I always run premium gas. I don't know what else to do. Anyone had this problem?

Also I just changed the right front cv axle a couple weeks ago. It's a different clunk or knock sound than that makes.

Also I just changed the right front cv axle a couple weeks ago. It's a different clunk or knock sound than that makes.

 

Check to be sure all electrical plug in connections are good under the hood, also vacuum hoses. Air cleaned might be worth checking too.

 

I had an interrmittend hesitation over the last two weeks. I removed the MAF on Sat. and "Carefully" cleaned it. I used a spray cleaner, (gumout should work) but DID NOT TOUCH. I figured if it was shot it was worth a try. I have not had the problem since.

 

Good luck

Check to be sure all electrical plug in connections are good under the hood, also vacuum hoses. Air cleaned might be worth checking too.

 

I had an interrmittend hesitation over the last two weeks. I removed the MAF on Sat. and "Carefully" cleaned it. I used a spray cleaner, (gumout should work) but DID NOT TOUCH. I figured if it was shot it was worth a try. I have not had the problem since.

 

Good luck

I found out the clunk was actually a small back fire. I finally got the engine light to flash. I checked pressure and determined it was a misfire. When I replaced the spark plugs a few months ago I used Bosch Plat. From reading forums I learned that was a no no. I just switched everything to NGK plugs and the whole problem is fixed!! How weird is that. So there is a reason that NGK plugs are OEM for Subarus. The thing went from barely running to feeling like a race car. Thanks for all the advice.