NHTSA Complaint #10506001 — 2008 LEXUS LS460

AFTER A MANUFACTURE RECALL FOR THE VALVE SPRING REPLACEMENT, I HAD MY FIRST OIL CHANGE. DIRECTLY AFTER THE OIL CHANGE, I NOTICED THAT AROUND 35 MPH WHEN I NEEDED TO PASS A VEHICLE, I WOULD STEP ON THE GAS (MOST OF THE TIME PUSHING THE ACCELERATOR PEDAL TO THE FLOOR) THE CAR WAS VERY SLUGGISH AND UNRESPONSIVE. IT WOULD TAKE ABOUT 10 SECONDS FOR THE VEHICLE TO SLOWLY ACCELERATE AND THEN THE CAR WOULD TAKE OFF WITH THE RPMS CLIMBING NEAR RED LINE UNTIL I RELEASED MY FOOT OFF THE ACCELERATOR. IF I SET THE CRUISE CONTROL AT AROUND 35-40 MPH THE CARS ENGINE SURGES. I CAN HEAR THE AUTOMATIC GEAR SHIFTING GOING ON AS WELL. THIS HAPPENS MUCH MORE FREQUENTLY WHEN IT'S HOT AND HUMID OUTSIDE. THIS IS AN EVERY DAY OCCURRENCE. I HAVE TAKEN MY CAR TO THE REPAIR FACILITY, THEY HAVE HOOKED UP THE COMPUTER TO MY CAR BUT IT SHOWS NOTHING. THERE ARE NO ASSOCIATED ENGINE LIGHTS WITH THE SURGING. I ONLY USE 98 OCTANE PREMIUM UNLEADED FUEL, THE VEHICLE HAS BEEN LOOKED OVER NUMEROUS TIMES BUT STILL NOTHING. I HAVE ALMOST BEEN IN SOME ACCIDENTS BECAUSE OF THE PROBLEM. I'M WORRIED FOR THE SAFETY OF THE VEHICLE. *TR