One problem related to other fuel system pump has been reported for the 1999 Acura RL. The most recently reported issues are listed below.
Engine quit while driving because of failure of efi relay which cut off power to the fuel pump. Had to have car towed. Part was replaced - old part not available. 1) I was pulling out of a parking lot into a local street when the engine died. Fortunately, there was no traffic near and I was able to push the car back into an adjacent lot. 2) however, if I had been on the freeway just one block away, I would have lost power steering, power brakes, and have been in much heavier traffic, which could easily have led to a high-speed collision. 3) I had the car towed to an independent shop where, for $300, they diagnosed the failure and replaced the defective part. The mechanic commented that the design of supplying power to the fuel pump through two different relays was poorly thought out.