This will prevent any backfire, that might occur, from scaring the heck out of you when cranking the engine. IMPORTANT: This is a very fast and easy test but you do have to take one very important safety precaution and this is to reconnect the air intake duct after spraying starting fluid down the throttle bore (although you don't have to fasten it). You can easily accomplish this by attaching a spark tester to the spark plug wires and having a helper crank the engine (while you observe to see if the spark tester sparks). This item Electric Fuel Pump with Sending Unit Replacement for Ford Expedition 1997-1998 4.6L 5.4L RWD A-Premium Electric Fuel Pump Module Assembly with Sending Unit Compatible with Ford Expedition 1997-1998 V8 4.6L 5. NOTE: To get an accurate test result from the starting fluid test, you need to first confirm that the ignition coil pack is creating and delivering spark to all 6 cylinders. The rule of thumb is that if by spraying starting fluid your Ford starts, even if momentarily, then this tells you that fuel is missing from the equation (engine start equation: fuel+spark+air=combustion). Using a starting fluid is a very quick way of narrowing down a ‘cranks but does not start’ condition (although it's not the most accurate way of diagnosting a bad fuel pump). TEST 1: Using Starting Fluid To Confirm Lack Of Fuel Alright, with this info under our belts, let's get testing. Back-fires thru' the intake manifold when accelerating your pickup or van down the road.īoth of these conditions can be tested with a fuel pressure gauge.Lack of power when accelerating the vehicle down the road.You'll probably see one or more of the following symptoms: 1998 Ford F150 Fuse And Relay Diagram1998 Ford Expedition Fuse Diagram 93 Ford F150 Fuel Pump Questions Answers With Pictures. The PCM will still pulse (activate) all 6 fuel injectors.īut when the fuel pump fails slowly, your Ford will start and run but with engine performance problems.The ignition coil pack is creating and distributing spark to all 6 cylinders.The engine turns over but will not start.In this type of scenario, you'll see that: Obviously, when the fuel pump completely fails, your 4.2L equipped pickup or van isn't gonna' start. Symptoms Of A Bad Fuel Pumpįuel pump failures fall into two categories: Total fuel pump failure and a slowly dying fuel pump. You can find this tutorial in Spanish here: Cómo Probar La Bomba De Gasolina (4.2L Ford E150, E250, F150) (at: ). Where To Buy A Fuel Pressure Test Gauge.TEST 2: Checking Fuel Pressure With A Fuel Pressure Gauge.
![98 ford expedition fuel pump location 98 ford expedition fuel pump location](http://i698.photobucket.com/albums/vv345/qcksnake/lightning%20pics/exp2.jpg)
The problem isn’t bad if treated at 30,000 miles, but over 100,000 miles Ford’s recommended interval it cakes the electrode in a concrete-like grip. TEST 1: Using Starting Fluid To Confirm Lack Of Fuel. FordProblems explains it: At the end of the plug an electrode extends a bit beyond the threads and creates a gap between the plug and the cylinder head which gets filled with carbon deposits.