You need to properly diagnose it to avoid paying someone to diagnose it for you.
If you are concerned it is a fuel related issue, you should start by checking fuel pressure readings and behaviors. If the problem is what you think it is, it will be immediately apparent.
The first step is using a fuel pressure gauge.
Autozone Lone-A-Tool ($150 that you get back when the tool goes back):
OEM/Fuel pump diagnostic kit 27167- ReadReviews onOEM #27167
Harbor Freight ($20):
Fuel Injection Pump Tester
Many parts retailers can scan for codes at no charge, which may also be good to make sure there are no other surprises lurking.