Your smooth and powerful Infiniti engine has suffered from a case of the hiccups lately - could your Infiniti fuel pump be on the fritz? A failing fuel pump will display symptoms such as hesitation, bucking and general power weakness when you are driving at high speeds. When you turn over the ignition key, the engine will crank but will not start. And when it finally starts, the engine gives out. Or, your car might be suffering from 'lean misfires,' which is an indication that the proper air-to-fuel ratios are not being reached for proper combustion to occur. Unburned fuel is passed into the exhaust system during a lean misfire, which will raise your hydrocarbon emissions and reduce your gas mileage. Your Infiniti fuel pump might be suffering from some clog in the fuel system, which forces it to work extra hard and will eventually lead to its destruction. Unfortunately, a lot of those symptoms could stem from other problems in the combustion or fuel system. You can diagnose the problem with a fuel pressure gauge, which is inexpensive and found at most auto supply stores. If the problem lies with the electrical current that runs your Infiniti fuel pump, do a voltage check. If you pinpoint the issue, then purchase a new Infiniti fuel pump from our site, and install it yourself!