which valve are you talking about,fuel injection is mixed automatically with the air and fuel ratio through the injectors,i hope that was what your talking about,good luck.,,PS i don't think a 94 model uses a mixing valve,if it does have one on it it will be before it goes in to the firewall in plain site.
if it is a fuel injected vehicle and i'm pretty sure it is. It is a computer controled system you have to take it in to get adjusted.
