recently has stated to feel quite sluggish so i got so info off jgms website to check the sensors voltage outputs and when checking the lambda at tick over it was sitting at a steady 1.9 volts or there abouts and the info i got says it should be alot lower and flickering is this correct also ive just read and you cant use a analog meter is this correct as that is wat i have used? maf sensor was spot on so dont no what else to do can anyone in lighten me please my car is a 94 wrx with true 3 inch turbo back exhaust and panal filter thanks