Other Fuel System Pump Problems of Lexus LS400

Recently the car began to stumble under acceleration while driving up a hill or merging into traffic or maintaining speed while driving on the interstate. I initially thought it was a fuel supply issue so I changed out the the fuel filter, without any improvement in the problem. I was going to change the fuel pump also and while researching on the internet I learned of a problem with bad electrolytic capacitors inside the car's ecu (engine computer) which can mimic a fuel supply problem. I am a trained electronics technician, so I removed and disassembled the vehicle's ecu and replaced 2 capacitors (cost, less than $1) that I could see were bad (leaking electrolyte fluid). I test drove the car and the "fuel supply problem" was gone, it drove normally again and did not stumble when the accelerator pedal was pressed. I ordered the other 5 or 6 electrolytic capacitors in the ecu (from an outside source, the dealer will only sell a complete ecu for $2000 plus) to hopefully prevent future occurances. In conclusion, it appears the bad capacitors are the result of a "large-scale industrial espionage foul-up". Not a joke! this resulted in defective capacitors being used in many electronic assemblies (consumer electronics, automotive, household, etc. . Read more...