A friend of mine had to change his and went out on YouTube and found a couple of videos that showed folks changing it without taking the manifold off. He did it their way and he got it replaced and it was a pisser to get to and mostly done by feel. Said it took about 45 minutes? I am going to give it a try.
I don't know what you mean by the '3/8 tool' to relive the fuel pressure?
I too did it by feel after watching a few youtube videos. I separated the fuel line using one of these
3/8 fuel line tools to give my hand a little extra room, and then literally laid a drop cloth over the
engine and climbed up and in, chest down and arms between the engine and firewall. You are basically working blind, so I used my cellphone to take a few pictures so I could see what orientation the wiring clip was on the sensor which made it easier to feel how to pop it off. Make sure you have a deep 1-1/16 socket on hand with a few universal socket joints and various extension lengths. If I remember correctly, I think I ended up wrapping my universal joints in few wraps of electrical tape, so they were flexible but not floppy.
Other than that, take your time, it will take a few attempts, but it is doable and I think the whole project took about 20 minutes.
