I can think of two reasons for the pulsating, a pulsating fuel pressure (which you can check with a fuel pressure gauge) or a problem in the secondary ignition circuit such as a bad ignition wire, fouled spark plug, arcing dist cap. It could also be an unbalance in the fuel distibuter. Thinking more about it I would probably suspect a fuel injector that is out of spec. Every time it's turn comes around it puts out the wrong amount of fuel. Knowing how touchy the fuel system is to dirt that would probably be my first choice. A quick test of the ignition system, run the car at night in a dark spot with the engine cover open, put your hands in your pockets and while someone can rev the engine observe the ignition system for blue glows or sparks. You cannot check the spark plug boots this way because of the deep wells. If the wires are origional just replace them. The injectors can be tested and posssibly cleaned by someone with access to an injector tester, you don't always have to replace them. David Teitelbaum vin 10757 --- In dmcnews@xxxxxxxxxxx, jdsjlv@xxxx wrote: > With all of the posts regarding hesitation, ect. I figured I would comment on > how my D pulsates while coasting. Yesterday I was cruising down a flat road > in my home town. I had my foot resting on the accelerator and I was in 3rd > gear. My RPM's were right on the 2100 mark and my speedo read 35 MPH. What I > felt was a slight pulsation, almost as if the car was trying to keep up with > the pace given the consistent placement of the accelerator. If I pressed down > more on the pedal or released it, nothing out of the ordinary would happen, > either it would accelerate strong or decelerate accordingly. My question is > this: given that the D is a CFI engine (right?) would this explain the > pulsating at a consistent speed? I don't feel it unless I really concentrate > on it, or If I go slow enough. Last year I had my micro switch (the one near > the accelerator spool) replaced and my car is properly serviced. Has anyone > experienced this before? To better explain the feeling behind the wheel, > imagine sitting in a chair and ever so gently moving forward and backward - > that's what it feels like! Any ideas??? > Thanks, > Joshua D. Schwartz > 001292 > Trumbull, CT