A loud bang while driving

[FiSTNorway]

Drove on the highway the other day and suddenly it is as if something comes loose or hits the car below. A pretty loud bang. I turned over and stopped the car immediately, no loose part or any sign of hitting anything in the way. No noise immediately afterwards or of normal driving on. Lots of cars on the road and no one signaling anything. But with occasional application came a sound reminiscent of a clattering sound, no loss of power or torque. Everything sits and feels tight on quick inspection. No lamps, coolant and oil are OK.

After putting the car in the garage that night, I went out for a short drive afterwards and then the sound is gone, strangely enough.

Workshop has taken a visual inspection in the engine compartment and below, no faults found. Diagnosis not taken yet.

Several mechanics thought it could have been a stone in one of the engine mounts, prolly the (RMM) that may have loosened and made the sound, what do people think here?

Car: Fiesta ST 2013 (EU model) Stage 1R 240 engine HP and 390 NM.

 

[Intuit]

SUMMARY: Traveling on the highway, there was a loud bang from below and the car immediately shut off afterward. Started it back up and drove normally without further incident. Mechanic inspection found nothing so far. (Mods listed below.)

If it shut off, there has to have been a trouble code stored. The start/stop button has to be held for an (uncomfortably) long time before the engine will shut off. Some forum members for the Ford Escorts had an inertial switches in the power line to the fuel pump that would be tripped with HARD impacts because it was attached to the rear strut tower. It was intended to shut-off the fuel pump only after sudden deceleration. (wreck)

Among the suspects for me, maybe debris got between the wheel spokes and brake caliper? There should be evidence of this.

If a strut mount came apart it can sometimes be difficult to reproduce so more driving would be necessary.

Some sort of severe detonation events, I would think would produce a trouble code.

Did the mechanics look for trouble codes? What did they find?

 

[FiSTNorway]

SUMMARY: Traveling on the highway, there was a loud bang from below and the car immediately shut off afterward. Started it back up and drove normally without further incident. Mechanic inspection found nothing so far. (Mods listed below.)

If it shut off, there has to have been a trouble code stored. The start/stop button has to be held for an (uncomfortably) long time before the engine will shut off. Some forum members for the Ford Escorts had an inertial switches in the power line to the fuel pump that would be tripped with HARD impacts because it was attached to the rear strut tower. It was intended to shut-off the fuel pump only after sudden deceleration. (wreck)

Among the suspects for me, maybe debris got between the wheel spokes and brake caliper? There should be evidence of this.

If a strut mount came apart it can sometimes be difficult to reproduce so more driving would be necessary.

Some sort of severe detonation events, I would think would produce a trouble code.

Did the mechanics look for trouble codes? What did they find?

Seems google translate made this wrong for me, i turned over and stopped the car my self, the car did not shut down or show any sign of damage/something wrong.

No trouble codes where read, but im thinking about doing it just to see.

 

[Intuit]

We have a lot of odd or weird phrases in English. Instead of saying "turned over" we say "pulled over". I think that was the source of my confusion. Google did fine.

Only items on the car that would produce a loud bang, are suspension related or exhaust related.

Did this occur as you were traveling over a dip in the road? Those can produce a lot of suspension travel in my experiences.

Jack the car up. Look for any wheels that are hang different, when compared to the others. Look at the exhuast hangers.