SOURCE: fuel pump relay
I have found the relay at my local auto parts recycling center, after many hours of troubleshooting, I also found the PCM to be faulty. A replacement computer is on order. This model has been modified by prior owner removing the inertia safety switch. A replacement is also being sought. A similar problem occurs when the ECT (engine coolant temperature) sensor is destroyed.
Whatever you do, DO NOT REMOVE THE INERTIA SAFETY SWITCH. This does protect the fuel pump and related circuit. Also linked to the fuel pump circuit is the main relay, and the injectors.
If you find the thermo fan starting within seconds od rotating the engine, the problem is the main relay earth, PCM (needs replacement) and/or the fufel pump relay. This is known as LIMPO HOME MODE.
SOURCE: replace fuel pump
Fuel injection motors have in the tank fuel pump and screen .Access from under back seat,fold forward and move carpet forward after popping out plastic carpet retainer plugs.move floor plate,phillips screwdriver ,no need to unplug electric.remove gas hose,tuck forward out of way.unplug electric plug and remove screws from top of tank and gently pull up and tilt toward gas tank filler so that the gas gauge float and rod is not ruined.the plastic pickup screen will need to be folded to get out of tank.removing the float controll with small nuts is a good idea. the pump has a screw in the bottom that probably needs a vise grip if the phillips head rounds out. everthing is slip apart from this point.pay attention to plastic over the intake nipple and rubber o ring and piece up in the intake line.ebay has reasonable pumps.look at pictures and see the screen and plastic parts that you may need.the rubber on bottom of pump may need to be trimmed because of groove channel may have metal insert in your new pump. unless new one is with new pump.kind of tricky to put back together.but is do able .
SOURCE: where is the fuel pump relay on a 1992 ford tempo?
The fuel pump relay is part of a large relay control unit called the IRCM (intagrated relay control module)
The module is about 6"x4"x2" and has gobs of wires (large retangular connector) coming out of it, the module is mounted on a bracket under the hood that is bolted to the top of the driver's side front strut tower, this module can be self tested by a dealer to see if it is bad, they seldom fail, I am a Ford dealer tech and have only replaced 2 in 20 years, Tempo does however have a fuel pump issue..
SOURCE: 1990 ford festiva no power to fuel pump. replaced
The pump should have a fuse in the fuse block. You need to check for power in the fuse block and you need to check power to the pump relay.
Sometimes there is a fusible link to the Relay. If you check the connector terminals for power where the Relay plugs in, you can determine if the fusible link has blown. You could have already replaced the bad parts and now need to restore power to the Relay.
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