Your question is rather difficult to answer, but I will try.
Faith doesn't have a quantity. It is either strong or weak or in-between. Faith in God is based on His promises. Therefore strong faith is based on the bare written promise of God that applies to the chosen action.
It is easier to have faith in positive or negative circumstances because we have clear promises to depend on in either case. But it is very difficult to have faith where there are no circumstances at all. This means that there is no external support support our faith other than a written promise in the Bible.
For example, strong faith that brings absolute assurance of salvation comes because the person believes, "By grace are we saved, through faith, not of ourselves, it is the gift of God; not of works least anyone should boast in them." The person may not feel saved at all, and has no other evidence of it, other than that written verse. His strong faith takes hold of the verse and thereby has full assurance of salvation.
A person with weak faith may believe the verse and have serious doubts about his salvation and his spiritual state. There is no doubt that he is saved, but he is not sure in himself that he is. He cannot just depend on that verse alone, he needs something else. God, in his grace and mercy, may provide some sensory indication or experience to bolster his faith to make him feel more saved. It may be a sense of the presence of God with him, or a friend coming to him and acknowledging the fundamental change he can see in his life.
It is the same with the baptism with the Spirit. A person with strong faith will ask God according to the Scripture, "Ask in the will of God and you will receive", then he will receive it by faith, and then believe that he is baptised with the Spirit on the basis of the written promise, without any supporting emotion or sensory manifestation. Someone may ask how he knows he is baptised with the Spirit and he may answer, "Because God's Word says I am, period." A person with weak faith may need to have some sensory manifestation like trembling, jerking, falling over, automatically speaking in tongues, goosebumps up the spine to assure him that he is baptised with the Spirit. Believers with weak faith demand that tongues be the initial evidence of the baptism with the Spirit, when the initial evidence is actually faith in the written Word.
Now concerning tongues. I said, "automatic tongues" before, because some have had this experience when receiving the baptism with the Spirit. It is not an act of faith on their part. It is something that the Holy Spirit has done in them to bolster their weak faith. It just came out without the person actually choosing it to happen.
But to receive the on-going ability to speak in tongues, one must take the steps of faith to receive it - ask for it, receive it by faith, start forming words, phrases and sentences as a deliberate act of faith. Then the flow of the prayer language starts as the Holy Spirit inspires the words. Notice I said that it is a flow of language, not a compulsion. The person is in absolute control about when and how he speaks and the prayer-words he chooses, but it is the Holy Spirit who inspires the words as the person voluntarily speaks them. A person with strong faith will use his prayer language, believing that God hears and understands, on the basis that he asked for the ability according to the promise that he will receive what he asked for according to God's will for him, and that by actually receiving it from God's hands, that he will receive the real thing and not something counterfeit.
A person with weak faith will wait for something to bubble up from within him before he will start speaking, or he will expect the Holy Spirit to control his mouth and tongue while he remains passive.
A person with no faith in the Word concerning tongues will believe that it is either not for today, or not for him, and therefore will never use it as a tool for powerful prayer.