Question about 1987 Ford Bronco II

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Won't start Cranks and cranks, but will not start. Replaced starter, starter solenoid, reset inertia switch, both fuel pumps, fuel pump relays, ignition switches, checked fuses. Can someone please help me? I have no clue what the problem could be!

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  • 5 Answers

Either check your knock sensor, map sensor or fuel shut-off switch

Posted on Sep 23, 2013

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6ya6ya
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Posted on Jan 02, 2017

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SOURCE: 2004 ford E350 no power to fuel pump

put a test light on the ground wire to a 12v power source and see if the pump is grounded properly

Posted on Sep 11, 2008

  • 69 Answers

SOURCE: dodge ram fuel pump

no you most likely have one of the famous wiring problems for a dodge to have possible pcm problem check all pin conections to pcm on passenger side of fire wall under hood will be a start.

Posted on Jul 26, 2009

  • 564 Answers

SOURCE: replaced fuel relay - ignition switch, fuel pump

do you hear the fuel pump engage when you turn on the ignition if not look for the fuse that controls the fuelpump relay and make sure its not blown.

Posted on Nov 14, 2009

  • 5495 Answers

SOURCE: location of inertia switch/fuel pump

Yes it can. It doesn't take much like slamming a door or dropping a load of parts. There is only a magnetic ball inside the contacts and it is a wonder that Railroad tracks and Potholes do not trigger more shutoffs. All you do is find the switch and hold down the button on it for about 3 seconds.

Then try starting the van without slamming the doors shut until it is running. If the Inertia switch does not help check the fuse panel, then the relay. The relay should either be in the Black powerbox group or in with the fuseholders.

Posted on Apr 18, 2010

emissionwiz
  • 75814 Answers

SOURCE: I have a '96 Explorer that won't start. Cranks

what is the fuel pressure reading, chances are u just have a defecive fuel pump, if the pump is running u will hear it when the key is turned to run for one second, so do it repeated time off then on and listen, if u hear nothing repalce the pump.

Posted on Sep 22, 2010

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My 2001 Hyundai sonata died while driving and will not start turns over cranks but wont start fuel pump? crank shaft position sensor ? where is the location of fuel shut off value help


no inertia switch or fuel switch--fuses or relays ---to test the fuel pump easiest is to spray starter fluid if it fires you have a fuel problem if doesn't fire look into ignition [ spark]

May 28, 2016 | 2001 Hyundai Sonata

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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

2010 escape won't start


I will give you 2 solutions because I do not know if the "no start" means it cranks and will not fire or if it just does not crank.

For the no crank problem, this would be due to an Interlock switch being broken or out of position and preventing the starter solenoid from getting power from the Keyswitch. The switch often gets broken or knocked out of position when feet hit it. This switch is located under the dash and on the brake pedal lever. Often the brake lights do not work.

For the cranking and no start condition, this is often an Inertia switch that has tripped and cut off fuel pump power. It is located behind one of the front floor kickpanels and just needs the reset button pushed.

I hope one of the solutions works for you. Please rate my info.

Feb 03, 2013 | 2010 Ford Escape XLT

1 Answer

Jeep 06 libary will not start ,starter good and battary good what the probable


Do you mean it cranks but won't start?
Check for spark at a spark plug wire. If you have spark, it's probably not the ignition, but a fuel issue. Do you hear the pump come on briefly when key is turned to on? You may need to stand by the gas tank with the cap off, while someone turns the key on. The pump should hum or whirr for about 2 seconds to prime the fuel system. Then it will shut off until car is cranked over. If the pump and the ignition is working, check fuel pressure.
If you had no spark, it could be the coil, or crank position sensor, or...well, you would have to diagnose the ignition system.
If the problem is not cranking over, check all connections at starter and battery for a clean tight connection. Check for power at the starter solenoid when key is held in crank position. If power there, the solenoid must be bad. If no power the circuit from ignition switch to the starter solenoid has a problem ( like the starter relay or the neutral safety switch).
Good luck.

May 26, 2012 | 2005 Jeep Liberty

1 Answer

1992 C1500 w/5.7 engine won't start


Have you checked the "Bump Switch" this is a small inertia switch which turns offf the fuel pump to prevent it running in the event of an accident. They are usually mounted in the boot(trunk/load area) . There should also be one mounted under the front of the vehicle to initiate the Airbags. They usually cut the earh return(at least it does on my Granada, XR3i and Sierra XR4x4) hope this helps.

Feb 09, 2012 | Chevrolet C1500 Cars & Trucks

1 Answer

Car will turn over but won't start. Through the


No noise from fuel pump when you turn over the car .First thing get voltage at fuel pump relay checked, is there 12 volt to the relay.If no, then problem is again the relay.--------- To reconfirm the problem, try other test, that is remove the relay and by pass the relay terminals with a jumper wire .Then with 12 volt external battery give power to fuel pump connector and see, if the fuel pump starts, then its clear that fuel pump relay is faulty.----------- Also other problem can be fuel pump inertia switch.If the inertia switch is faulty then also fuel pump will not start.-------- The fuel pump relay on a 1995 Ford Explorer is in the power distribution
box, in the engine compartment, driver's side near the firewall.----------
The fuel pump inertia switch is in the right front passenger area
it is below the dash but above the carpet in the right hand corner.--------
Its a push button type inertia switch.
--------
Fuel Pump Activation
When ignition switch is turned to START position, PCM operates fuel pump relay to provide fuel for starting engine. PCM senses engine speed and shuts off fuel pump by opening ground circuit to fuel pump relay when engine stops or engine speed drops to less than 120 RPM. When ignition switch is in ON position, EEC power relay is energized (contacts closed). Power is provided to fuel pump relay and timer in PCM. Fuel pump receives power through fuel pump relay contacts.
Inertia Fuel Shutoff (IFS) Switch
All models use an electrical interrupt switch in fuel system. During a collision or vehicle rollover, electrical contacts within inertia switch open, shutting off fuel supply to electric fuel pump. Fuel supply is interrupted even when engine is running.
A reset button is located on switch assembly. If electrical circuit trips, vehicle will not restart until switch is reset. Fuel system should be inspected before resetting switch.
IFS switch is located under instrument panel, near right side of transmission hump.
----------- If the fuel pump relay, the inertia switch and fuel pump all checked ok, and fuel pump is working with direct 12 volt source to fuel pump.Then problem relates to computer.The computer (power control module, PCM) is faulty and has to be replaced.--------- This will help.Thanks.Helpmech.

Jul 17, 2011 | 1995 Ford Explorer

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

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