Why does my Ford Transit Custom have a rough idle?

I've noticed that when I come to a stop, my Transit Custom has a rough idle. What could be causing this issue and how can I fix it?

A rough idle could be caused by a variety of factors, such as dirty fuel injectors, a clogged air filter, or a faulty oxygen sensor. I would suggest taking your Transit Custom to a trusted mechanic for a diagnostic test to determine the exact cause.

If your Transit Custom has a high mileage, the rough idle could be due to worn out spark plugs or a failing ignition coil. I recommend checking these components and replacing them if necessary to improve the overall performance of your vehicle.

Another possible reason for a rough idle could be a vacuum leak in the engine. This can be caused by a cracked or damaged hose, which can be easily identified and replaced by a mechanic. Make sure to get this issue fixed as soon as possible to avoid further damage to your engine.