The History: I have posted various threads on this problem over the past few months. Each thread took me a step down the road, and with each step I thought that I would surely find my answer. So here I sit with many new parts and an old problem. The Problem: Intermittent surging. It generally happens when I am keeping a steady throttle, and is more noticeable at low speeds (10 to 15 MPH). There are short surges forward...each lasting about a second. It just jumps forward, then falls off, then jumps forward again, and falls off, etc. At constant throttle at 50 or 60 MPH you can just barely notice it, when it occurs, which again is not all the time. The “Fix” so far: I have replaced spark plugs, spark plug wires, rotor, and distributor cap. I replaced the idle control valve, EGR valve, rebuilt the TBI including fuel pressure regulator, and fuel filter. I put a couple of bottles of Seafoam through the fuel system. I have not replaced the fuel injectors, but I looked into the throttle body at idle and I see no leaks, just a fine mist. I have had the fuel pump replaced and I have put in a new oxygen sensor. I also checked to make sure the throttle plates weren’t loose. About all I can think to do is replace the injectors, or have them rebuilt. Are there any other ideas out there? Has anybody run into this? This is a 95 Suburban k1500 with a 5.7L and 208,000 miles. ---------- Post added at 09:16 PM ---------- Previous post was at 09:11 PM ---------- I forgot to say that it idles smoothly. RPM's are solid. This is just when underway.