msa04

Thanks for the input. I'm doubting it's an ignition problem because the engine is not experiencing loss of power. CEL is not on. It truly feels like something is out of balance in the rotating assembly. Vibration can be felt on the steering wheel as you move through the rpms all the way up to 4000 in park. It's a constant frequency at a single instance and increases in frequency and intensity as rpms increase. Exhaust note is normal without hiccups as well. Replaced the belts today and I ran the engine without belts - vibration is still there. The harmonic balancer is not showing signs of separation so I'm assuming it is ok - not completely ruling it out yet. The top engine mount isn't separated (I took it out). I'll check the other mount this weekend. I'm at a loss at this point. I might actually take it to the dealer if I can't isolate it this weekend.

Most recent service other than oil changes is plugs at 120k and transmission turbine speed sensor at 105k. The vibration just recently started, I'd say the last 500 miles. At first I assumed tires out of balance, but then I noticed it was vibrating when stopped. I will do as you mentioned and remove the accessory belt and run the engine and see if vibration remains. I'll go ahead and purchase the belts tomorrow...they could probably use replacing anyway. I didn't get a chance to pull the belt off good afternoon. Thanks for your help.

Well, I inspected the accessory belt assembly again with the car running...i noticed the A/C clutch pulley has a visible run-out. This could be the issue. I'm going to remove the belt and inspect the pulley.

Well, I inspected the accessory belt assembly again with the car running...i noticed the A/C clutch pulley has a visible run-out. This could be the issue. I'm going to remove the belt and inspect the pulley.

Ok, I'm home now and got a chance to check the engine and torque mount. Based on a video I saw here by macT, I think mine has some play, but not like the bad one on macT's video. The vibration is more pronounced at higher rpms.

Didn't think about that. I will check this afternoon. I will go ahead and check the transmission mount as well.

Hello All, I have a 2008 Ford Edge 2WD that I have owned since new in late 2007. Current mileage is 145,000. A recent behavior has surfaced with the vehicle - when the vehicle is stopped and in Park or Neutral, a vibration can be felt as you work the engine through its RPM range. The vibration is not noticeable at idle, but it starts at around 900-1000rpm and progressively gets worse as the RPM rises (I tested up to 4000rpm). It's a slight vibration that can be felt through the steering wheel, but it is not vibrating the entire car. Engine has great power and the transmission appears to be fine. Vibration is also present when the vehicle is moving, but is harder to notice since the the vehicle is moving. This vehicle has been maintained very well, so I'm reaching out to you all to help me get to the bottom of it. This appears to be strictly engine rotating assembly or accessory related. Are there any known issues with the 3.5L engine that has these early symptoms? Prior experience with other vehicles make me think it's quite possibly a harmonic balancer issue, but the balancer isn't showing symptoms of separation or run-out. I was reading about the internal water pump issues of the 3.5L on this forum - is this possibly an early sign of water pump failure? I'm planning on checking oil and coolant when I get home to see if there are signs of mixture happening. Thanks in advance for any help. Mark