2006 ACURA MDX Engine And Engine Coolingengine Problems

TOPIC: UNCOMMANDED ACCELERATION; LACK OF ACCELERATION; INCIDENTS OCCURRED OVER THE COURSE OF 3 WEEKS (USED 2006 ACURA MDX PURCHASED ON APRIL 12, 2010). SHORTLY AFTER PURCHASE, VEHICLE EXHIBITED "STUMBLE" WHEN ACCELERATOR WAS PUSHED. THAT IS, THE ENGINE RPM DECREASED WITH INCREASING PEDAL PRESSURE. PRESSING DOWN AGGRESSIVELY RESULTED IN ENGINE IDLE CONDITION. THIS OCCURRED 0.5 MILES FROM HOME. PROBLEM DID NOT CONTINUE THE NEXT MORNING. ON MAY 3, 2010, WHILE COASTING THROUGH AN INTERSECTION AT APPROXIMATELY 35MPH, VEHICLE SUDDENLY ACCELERATED WITHOUT PEDAL INPUT. CRUISE CONTROL LIGHT WAS OBSERVED ON (CRUISE CONTROL HAD NOT BEEN ENGAGED PRIOR TO INCIDENT). LIGHT BRAKE PRESSURE STOPPED ACCELERATION AND VEHICLE RETURNED TO NORMAL OPERATION. ON MAY 6, 2010, VEHICLE "STUMBLE" RE-OCCURRED. PULLING THROUGH AN INTERSECTION WHILE PRESSING ON ACCELERATOR, VEHICLE RPM DROPPED. MORE ACCELERATOR PRESSURE RESULTED IN MORE RPM DROP. PULLED TO SIDE OF ROAD AND STOPPED. WITH VEHICLE IN NEUTRAL OR PARK, ENGINE RESPONDS NORMALLY...