Signs of weak imaan:

بِسمِ اللهِ الرَّحْمَانِ الرَّحِيمِ

Committing sins and not feeling any guilt.

Having a hard heart and no desire to read the Quran.

Feeling too lazy to do good deeds, e.g. being late for salat

Neglecting the Sunnah.

Not feeling anything when hearing verses from the Quran, for example when Allah warns us of punishments and His promise of glad tidings.

Finding difficulty in remembering Allah and making dhikr.

Not feeling bad when things are done against the Shariah.

Desiring status and wealth.

Being mean and miserly, i.e. not wanting to part with wealth.

Ordering others to do good deeds when not practising them ourselves.

Making fun of people who do simple good deeds, like cleaning the mosque.

Not feeling concerned about the situation of Muslims.

Liking to argue just for the sake of arguing without any proof.

Becoming engrossed and very involved with dunya, worldly things, i.e. feeling bad only when losing something in terms of material wealth.