This is on my 04 Nissan Quest with 111K miles. I was getting dirty replacing the spark plugs, one bad ignition coil and the drive belts so I figured I would clean things up!
I used Simple Green and a small brush to agitate the dirt and rinsed the engine bay down with a hose. Also sucked out the water at the electrical connections then blew things dry. The ECU was wrapped in a plastic bag for protection.
Before:
After:
Engine cover and wiper cowl back on, gave the plastic pieces a quick dressing.
Thanks for viewing!
I used Simple Green and a small brush to agitate the dirt and rinsed the engine bay down with a hose. Also sucked out the water at the electrical connections then blew things dry. The ECU was wrapped in a plastic bag for protection.
Before:

After:

Engine cover and wiper cowl back on, gave the plastic pieces a quick dressing.

Thanks for viewing!