We need to do three things. First, test the fuel pressure.
https://www.2carpros.com/articles/how-to-check-fuel-system-pressure-and-regulator
Second, if you have a scan tool we need to monitor the o2 sensor data and see what the short and long term fuel trims are saying.
Last we need to pull a spark plug or two and see what they look like. If they are showing signs of rich condition then we can go after possible high pressure or injector leaking.
With all this info we should be able to get a good idea. Thanks
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Wednesday, September 30th, 2020 AT 3:25 PM
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