It could very well be the fuel pump relay...just like I said..that comes AFTER you see if you have fuel pressure ..if you have NO FP , then I would look at the relay..but if you do, then don't waste your time looking at the relay..see where I am going here.
Ask the guy if he did a FP test..that is the first thing you want to know...you still want to throw parts at the thing. Get a FP test gauge and have someone check for Fuel Pressure... if you can;t do it, get someone who can.
At least you will then know where to look........or we will even tell you th next step....I am not going to recommend a relay before I know you need one ..it is against all the thinking an logic I preach here...........

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A Dalton