There are a few things that could be causing this issue. One possibility is that the spark plugs are no longer sparking, which can be caused by a number of factors such as age, wear, or damage. Another possibility is that there's something wrong with the ignition system, such as a faulty coil or distributor. Finally, there could be an issue with the fuel system such as a clogged fuel filter or dirty injectors.
If you're not sure where to start, your best bet is to have a qualified mechanic take a look at it and diagnose the problem. Once they know what's causing the issue, they can recommend the best course of action for fixing it.
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