I have been trying to resolve issues with the '04 roadster I recently bought. Those issues were:
1. Trunk doesn't stay open unless fully open. Solution: new trunk lifters. Really easy to put in and did the trick.
2. Trunk release works but the trunk lid barely moves when released. I had to basically force my fingers under the lid to open. Solution: Remove and disassemble the assister spring assemblies. I stretched the springs to 3" and re-assembled. This seems to have solved my problem but only time will tell if it's permanent.
I hope this might help someone with a similar issue.

 

Most people just stick a penny or two in between the rubber cover and the spring for a little added pop.

Mine still sticks because I never open it and the weather strip sticks down. Gotta stick my fingers in there and give it a pull while I double clutch the switch.

 

You've got a good idea, but I'm going to try below link first then try stretching the spring if results aren't optimal.

https://my350z.com/forum/maintenance...-easy-fix.html

 

Thanks guys. Good to know in case my fix is just temporary.

 

even with the penny trick, the spring will eventually fail, mine cracked to pieces. they are like $28 each which is ridiculous

 

Yeah, I get the feeling that my spring stretch is temporary. The trunk lid just pops up enough so that I don't have to jam my fingers in the seam. Since I bought the car used, I don't know if that's as much as we can expect or whether it should pop up an inch, or what. I guess when my fix fails I'll bite the bullet and buy new springs.