I put a used custom setup on my car a while back and haven't had any problems with it. I haven't even gone through one bottle yet and I went to manually purge the system and check to make sure it was all working at the same time. While I was doing this, the noid opens and then just shut s again. I try it again and it wouldn't open at all. My relay is clicking but the noid won't open up. I tried a few more times, it tried a few times but keeps shutting and now doesn't seem to want to open at all.
Any ideas? I am new to this stuff so I don't know if this is a common problem or not, didn't find anything like this in other threads.
Thanks.

 

Where do you have the noid grounded? Check it first.