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Dirty Fuel Injectors

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Yes but injectors rarely give problems. A lot of garages try to sell fancy cleaning methods and flushes to every customer but in my eyes most of it is snake oil.

The only way to be sure what is causing engine hesitation is to drive it while plugged into a diagnostic tool and monitor/record live data such as fuel pressure, MAF, coil voltages etc. as the problem occurs. Even then, the cause of the problem could be something as simple as an air filter clogged with sand, a cracked/leaking boost or vacuum pipe etc. It just takes a good eye and a bit of experience to find the problem.

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