Will the car s ECU will fail due to the lose connection in distributor to spark plugs?

I cleaned the spark plug wires that cones out from the ECU and cleaned them. Once I connected the wires back and start the engine, I noticed that the engine is rough on idle and suddenly engine turned off. So I again checked the wires that I cleaned earlier. Turned out that 1 and 4 spark plug wires were not connected properly. So I reconnected them and tried to start the engine, but its only cracking. Further checking, I found that I'm not getting any spark from the spark plugs. I'm worried about ECU, so any advice is appreciated. My car is Honda City 2001 Manual.

Likely no. Although the Distributor might be shot. Pull the cap and check for burn marks in side the contacts and on the rotor.

Have the car towed to a shop and show a mechanic exactly what you were fooling around with and pay him to put it back together correctly. After this please never, ever open your hood again.

Plug wires aren't connected to the ECU, they go to the distributer. Not connecting them properly won't mess up the ECU. Maybe the rotor in the distributor or the cap contacts are worn so bad that the spark is jumping to ground on the rotor centerpost.

You cleaned the spark plug wires? I can't envision just what all that entails.

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