Codes me too

[PKRWUD]

Okay, you need to access the fuel pump relay. When you get to it, remove it. Then, with a DMM set to ohms on the 200 scale, measure the resistance between the terminal in the harness where the Pink/black wires come together, and ground. Make sure it's an excellent ground connection. If resistance is less than 10 ohms, the ECM is bad. If resistance is greater than 10 ohms, replace the fuel pump relay, making sure the terminals are all clean at the connector, and then inspect the fuel pump ground connection. If it proves to be good, then there is a fault inside the pump itself.

You also need to inspect the vacuum hose going to the EGR valve, and make sure it isn't cracked or leaking. If it looks good, leave it disconnected, and attach a vacuum pump to the EGR. Apply 20" of vacuum to the EGR. If the valve opens and holds vacuum, inspect the wiring at the EVR solenoid. If the EGR does not open, or does not hold vacuum, replace it, and make sure the passage is clear.

Disconnect the negative battery cable, and turn on the headlight switch for 5 minutes. Shut the switch off, and reconnect the neg battery cable.

Run KOEO codes, and when it passes, run KOER codes. It should pass. If code 91 returns, let me know.

Take care,
~Chris