Question about 1998 Mercury Sable

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No start. no spark, no fuel pump relay. eec relay energizes, fuel pump relay will not. fuses and relays are good. pcm has also been replaced.

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It does have arelayt anfeuse,start with control module,and ifyou have a wireing diagram check for output at prosessor

Posted on Jan 04, 2009

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I replaced the fuel pump on my 1998 ford f 150 and it is not getting any power to the fuel pump I checked the fuses but didnt see any blown fuses


Fuel pump relay , maybe . Inertia fuel shut off switch tripped .Does the vehicle have spark ? No signal from the Crankshaft position sensor ,the PCM - engine computer will not energize the fuel pump relay . Video's on youtube ,testing fuel pump electrical circuit from the relay base , where the relay plugs into .

Dec 26, 2017 | Ford Cars & Trucks

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I have a 2011 Hyundai Sonata my fuel pump ain't kicking on does it have a reset button


No it doesn't . Has fuel pump relay controlled by the PCM - powertrain control module . The PCM needs to have inputs from crankshaft position sensor before it will energize the relay . Does the vehicle have spark at the sark plugs or coil's ? If there is spark the crank sensor is good . Would need to do fuel pump electrical circuit testing , like this
Testing Electric Fuel Pump Problems with Voltage Drop Test Look at the fuse / relay box under the hood in engine bay . Find fuel pump relay . Do you know about relays an how they work ? Videos on youtube .

Mar 26, 2017 | Hyundai Cars & Trucks

1 Answer

96 windstar eec wiring scematic


Find another relay with an identical part number(maybe the fuel pump relay)& swap it in place of the suspect EEC relay.See if the buzzing quits.If it does,the EEC relay is bad.There might be a ac WOT cutout relay or fan relay with an identical part number that you can use instead of the fuel pump relay.The fuel pump relay & EEC relay will both have to be in place in order for the engine to start.A relay should click when you turn the key on,but it shouldn't make a buzzing noise.BTW-the EEC relay is energized when you turn the key on and then it supplies ignition on power to the computer,injectors,solenoids and fuel pump relay.Therefore, if the EEC relay is defective, these components are Not going to work.If you don't hear the fuel pump prime when the key is first turned on,that's a sign the EEC relay is bad.One of the injector wires should have battery voltage, if the EEC relay is powering up.If your vehicle doesn't have a matching relay to the EEC relay(except for the fuel pump relay)just pull the FP relay out and slide it into place of the suspect EEC relay for testing purposes.If the buzzing noise stops,then replace the relay because there's no way to test if the car will start without having both relays in place.

Oct 11, 2015 | 1996 Ford Windstar

1 Answer

1999 Playmouth 4 cylinder will start after several tries. have new fuel pump, fuel filter, spark plugs and wires, checked ignition coil pack and connections and ASD and fuel pump relays. Everything checks...


I see you replaced the fuel pump , spark plugs an wires , fuel fliter an checked ignition coil pack , Connections ,ASD relay . And everything checks OK ?????? How did you check these thing's ? Testing electrical circuits with a DVOM - digital volt ohm meter ? Fuel pressure testing the fuel pump before replacing ? Does the vehicle have spark ? How about hooking up a scan tool that can view engine sensor data .A bad coolant temp sensor could cause hard starting. Did you check the dark blue with yellow trace wire at the PCM connector 2 pin 67 . This is the PCM control side of the ASD relay . Do you know how a relay works ? how to test at the relay base ? where in plugs into.
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Jun 01, 2017 | Plymouth Neon Cars & Trucks

1 Answer

1989 f-250 inertia fuel shut-off switch switch location


This should be in the owner's manual. I found the below on autozone.com, their repair help location:
An inertia switch is used as a safety device in the fuel system. The inertia switch is located in the cab, generally under the dashboard on the right side. It is designed to open the fuel pump power circuit in the event of a collision. The switch is reset by pushing each of 2 buttons on the switch simultaneously (some models use switches with only one reset button). The inertia switch should not be reset until the fuel system has been inspected for damage or leaks.
When the ignition switch is ON , it turns the EEC power relay ON . The EEC power relay provides power to the powertrain control module (PCM) and the control side of the fuel pump relay. Power for the fuel pump(s) is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). From the fuse link or high current fuse, current flows through the fuel pump relay and inertia switch to the fuel pump(s). The fuel pump relay is controlled by the PCM.
When the ignition switch is turned ON , the fuel pump(s) will operate. If the ignition switch is not turned to the START position the PCM will shut the fuel pump(s) OFF after 1 second. The PCM will operate the fuel pump(s) operate the fuel pump(s) when the ignition switch is turn to START position to provide fuel while cranking.
After the engine starts, the PCM will continue to operate the fuel pump(s) unless the engine stops, drops below 120 rpm or the inertia switch is tripped.

Dec 28, 2013 | 1989 Ford F 250

1 Answer

Where is the EEC relay in a 1992 F-250 with a 7.5 liter


I suggest to check underhood engine bay, according with this wiring diagram, look under EEC (Electronic Engine Control 1992) or PCM (Powertrain Contro Module 1996-1996)...

7_6_2012_11_20_57_pm.jpg

Fig. 22: Engine wiring - 1992-95 F-Series 7.5L (VIN G), 1996 F-Series 7.5L Federal (VIN G) and 1996 F-Series Pick-up 5.8L (VIN H over 8500 GVW) engines - ZOOM LINK DIAGRAM HERE (top left)


ALso, I suggest to check wiring circuit C185, located in THIS LINK DIAGRAM (top right)

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Jul 06, 2012 | Ford Cars & Trucks

1 Answer

Where is the fuel relay


There is a fuse for the fuel on the firewall inside the cab:



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Fuel Pump The fuel delivery system uses either a high or low-pressure in-line or in-tank electric fuel pump, with some models equipped with both. It is a recirculating system that delivers fuel to a pressure regulating valve in the throttle body and returns excess fuel from the throttle body regulator back to the fuel tank. The electrical system uses two types of control relays, one controlled by a vacuum switch and the other controlled by the powertrain control module (PCM) to provide power to the fuel pump under various operating conditions.

An inertia switch is used as a safety device in the fuel system. The inertia switch is located in the cab, generally under the dashboard on the right side. It is designed to open the fuel pump power circuit in the event of a collision. The switch is reset by pushing each of 2 buttons on the switch simultaneously (some models use switches with only one reset button). The inertia switch should not be reset until the fuel system has been inspected for damage or leaks.
When the ignition switch is ON, it turns the EEC power relay ON. The EEC power relay provides power to the powertrain control module (PCM) and the control side of the fuel pump relay. Power for the fuel pump(s) is supplied through a fuse link or high current fuse attached to the starter solenoid (battery side). From the fuse link or high current fuse, current flows through the fuel pump relay and inertia switch to the fuel pump(s). The fuel pump relay is controlled by the PCM.
When the ignition switch is turned ON, the fuel pump(s) will operate. If the ignition switch is not turned to the START position the PCM will shut the fuel pump(s) OFF after 1 second. The PCM will operate the fuel pump(s) operate the fuel pump(s) when the ignition switch is turn to START position to provide fuel while cranking.
After the engine starts, the PCM will continue to operate the fuel pump(s) unless the engine stops, drops below 120 rpm or the inertia switch is tripped.

May 24, 2010 | 1992 Ford F250

1 Answer

I don't have control voltage to relay. Fuse not blown. Is the PCM possibly bad. I can jump the Normally open contact and i will get fuel pressure and can even start the van with no problem. Ineria...


There are 2 relays that run your fuel system. The first relay is the EEC relay(electronic engine control) and closes the fuel pump relay, so the fuel pump will work. It sounds like all other controls are working when you close the relay manually. I would replace the EEC relay, and this should repair you concern. Craig

Jan 23, 2010 | Ford E-150 Cars & Trucks

2 Answers

Where is the fuel pump relay located on 1998 mark8 lincoln


there is no per se fuel relay. it has a ccrm. constant control relay module, its located near the air cleaner box. I presume this is for a no start condition.

Oct 10, 2009 | 1998 Lincoln Mark VIII

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