System 2d fault. Constantly Injecting. Help please....

[ChrisMR2]

Hi all,
Newbie on here I have been using this system for a few years now and so far it has been excellent! Always run a 50/50 methanol/water mix. Anyways, over the last few days I have noticed my car knocking on cold start, fine when been running for a few minutes. I have noticed my system is constantly injecting! I can find no other fault with my car so presume it must be this causing the knock from cold. I used a gallon in a day :shock: Is this a boost switch fault? Is there a way of testing the componant? Are they available seperately?

Many Thanks in advance

Chris