Q: Replacing fuel pump control unit

Hello, thank you for writing in. With the extent of the work you have done already, it leaves very few components left to consider. With that being said, take a few moments to verify that all of the repairs you have made are holding and were done correctly. Check all ground connections for the sensors, starter, battery, fuse box, fuel pump, and all of the major wiring. Make sure nothing is unplugged or dislodged from its position. A poor connection can cause a lot of issues. One of the main components that you did not mention was the battery. That being said, considering the amount of work already done, you may want to replace the battery as well. What sensors have you replaced? You will want to concern yourself with the air intake sensors. They play a major role in starting the engine. With the age and mileage of the vehicle, you are doing well in replacing and updating everything you have already done. Do not be discouraged yet, and look to the basics: air, fuel, spark. One of these components is missing, or being inhibited by a sensor. For more diagnostic help, contact our service department.