The security crew of the block "E" decided to take John Coffey to the house of the warden whose wife is incurable ill with cancer.

Coffey successfully healed the woman, but the tumor was too big and Coffey getswent back to the jail very ill.

When Percy had walked up to his cell, Coffey grabbed him and passed him the tumor.

Or "grabbed the tumour and passed it to him", you have to say what he grabbed.

After this Percy goeswent crazy and shootst Wild Bill with the revolver.

You started the story in past tense so it should continue in past tense.

The security crew of the bBlock "E"E decided to take John Coffey to the house of the warden whose wife ishad an incurable ill with cancer.

Coffey successfully healed the woman, but the tumor was too big and Coffey getshe went back to the jail very ill.

When Percy had walked up to his cell, Coffey grabbed and passed him the tumor to him.

After this, Percy goes crazy and shoots Wild Bill with thea revolver.

The security crew of the block "E" decided to take John Coffey to the house of the warden whose wife is incurable ill with cancer.

incorrect word order. correction: "ill with incurable cancer"
however, it's more common to say:
"...whose wife is terminally ill with cancer."
"...whose wife is ill with terminal cancer."

Coffey successfully healed the woman, but the tumor was too big and Coffey goets back to the jail very ill.

When Percy had walked up to his cell, Coffey grabbed (him?) and passed him the tumor.

are you talking about grabbing the person? is so, "grabbed him"