Group:
I have a 1990 Cherokee Laredo with the 4.0 six, auto transmission, 4X4, and 158,000 miles. The Jeep is maintained very well and generally is in good shape. Recently it has developed a new problem. If I am cruising (at 45 MPH for example) down the road with enough accelerator pedal pressure to maintain my desired speed, all is fine. As soon as I lessen the accelerator pressure (just to slow down a couple of MPH), my engine RPM instantly drops way more than normal. I would guess somewhere between 500 - 750 RPM. When this first started happening, I thought the engine was going to die. After the sudden RPM drop, the engine/transmission operates normally. It doesn't matter if I decide to accelerate, slow down more, or come to a complete stop. There are no other symptoms that I can find that may help solve this problem. The vehicle works very well otherwise. Any suggestions? Thanks in advance.
Derek B.