Hi and thanks for using 2CarPros.com.
Have you checked to make sure the fuel pressure is within the manufacturer's specifications? Here is a link that shows in general how to check fuel pressure:
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
That is where I would start. Keep in mind, when the engine is placed under a load, more fuel is required. That could be the issue.
Let me know if this helps or if you have other questions.
Take care,
Joe
Sunday, September 2nd, 2018 AT 7:27 PM