My m=wife drives a Suzuki XL7 from 2007 with approximately 70000 miles on board. While driving the engine hesitates and the revs drop suddenly, not much but it is visible on the dash and the car shakes. I have changed the spark plugs, air filter is fine, and it is still doing it. I was thinking about changing the fuel filter however the filter is not serviceable in this car, it is part of the fuel pump assembly. A mechanic checked the fuel pressure and it appears it is fine. There are no warning light on the dash, no check engine light on and the car accelerates just fine if you give it gas. It has no problem starting and I have not noticed doing the same thing while idling, though this issue is intermittent. My wife stated that the problem happens regardless if the engine is cold or hot. Does anyone have any suggestions?