1998 Ford Mustang Hesitating - Engine


Question: im having problem starting car in the morning and when its been sitting for a while. it used to start once you hit the key but now it just cranks and while it cranks sometimes it pops, like a backfire. i know u dont pump the gas on fuel injected cars but if i pump it alot and hold it when i hit the key then it will turn on. but it still hesitates and i have to hold down the gas for the rpm to go up.i know a little bit about sensors and all and i belive it might be the fuel pump, fuel regulater, and someone said about the mass airflow sensor but how would i know . hook it up please

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Technican: Does car run okay when warm? Run okay at higher rpms? If it's driveable visit Autozone, Advance Auto, etc and have them perform the free trouble code check.

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