My mondeo tdci 130 has developed a noise like air escaping when accelerating hard from about 1800 rpm. There doesnt seem to be a loss of power as yet but the engine feels rougher. Show More Put all the coils, boots and springs in the parts bin for troubleshooting. 1997-2006 Expedition & Navigator - Sluggish/lack of power under hard acceleration - So I have a relatively new to me '06 with the 5.4 and it has around 85,000 miles on it. While normal driving or idealing the engine runs fine and smooth. This noise is more noticeable on acceleration because the engine is working harder, making the noise louder. With an exhaust leak, the muffling of the noise is cut short, making the noise louder. Worn or otherwise compromised drive belts are a common cause of noises when accelerating. There are also some more technical causes to point out I had a noise similar, but not the same on my 16 plate mk5 and it was always preceded by the engine not turning over the first attempt and firing on second attempt then when it hit 3000rpm it would lose power. The contact owns a 2017 Ford Focus. While attempting to accelerate, the vehicle hesitated and made a choking noise. The vehicle was taken to the dealer (lynn layton Ford, 3300 us-31, Decatur, al Ford Mondeo – (RoClickMag / Shutterstock) The most common signs of bad ignition coils in Ford Mondeo are engine hesitation when accelerating or loss of power, rough idle, misfires, excessive fuel consumption, check engine light illuminates, and sometimes hard starting. In worst case scenario, if the ignition coils are in really bad condition Re: 2.0 TDCI Intermittently Losing power. April 08, 2019, 06:23:44 PM #1. Sadly a very occurrence with Ford's common rail setup, essentially you've used up nearly all the fuel in the rail and the pump isn't able to supply it fast enough. Assuming its been regularly serviced and the fuel filter is good then typically its caused by the injectors On the last trip a few weeks ago, about 1.5 hours into driving, doing 80 mph in 6th gear the car suddenly lost all power (having 'skipped' with a momentary power loss accelerating from 2nd gear uphill on a slip road shortly before), Engine Malfunction Light came on and we got to the hard shoulder. dXVhZb8.