Hello Thomas. It’s concerning to hear about your van’s engine misfiring under load. This issue could be due to a variety of reasons. One possible cause is a weak fuel system. When your vehicle is under load, it requires more fuel. If the fuel pump, fuel filter, or fuel injectors are worn or damaged, they might not be able to deliver the necessary amount of fuel, leading to a misfire.
Another potential cause is an issue with the ignition system. Components like spark plugs or ignition coils might be failing, causing the misfire when under load.
Lastly, it could also be due to a mechanical problem in the engine itself, such as worn piston rings or valve issues.
Given that you rely on your van for work, I’d recommend getting it checked by a professional mechanic. They can diagnose the exact issue and suggest appropriate repairs.
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