Question about 1988 Ford Bronco II

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No fire to the fuel pump fuses looked good battery is weak but theres no sound from fuel pump to show that it is ingaging last time i drove it it was fine.

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Check the inertia switch which is located on the passenger side under the carpet pull it out from the top toward the firewall and you will see it, if it is poped just push it to reset. if not it run jumper from battery to fuel pump to see if it works, if it still dont work then check the fuel pump relay located on the inside of the engine compartment it is mounted on the firewall and looks like a small box with a plug coming out of the bottom there are 3-4 that look the same. my fathers is the first one closest to the front of the vehicle, you can find these at a parts store they are known for going bad..

Posted on Feb 17, 2011

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1 Answer

Getting no power to fuel pump fuse no power to ignition fuse


no engine stated.!

fuses good,? 12vdc on both sides key on?

spark good on all cylinders.??????????

this is first. not fuel, fuel is dead last.

if above is ok the engine runs on test fuel.

if the engine runs for say 3 seconds on test fuel, and SOUNDS

great, that means the spark and engine are ok, leaving>?

FUELING only.

easy , right?

if true all that, then the scan tool is next.

wont buy one,? like most here? (you cant fix cars with no scan tool)



make up or buy a NOID lamp. (a small 12vdc lamp)

see if the injectors are all firing.

if not, the PCM is cutting fuel.

if the injectors fire (electric pulse) then it may be fuel relay not closing.

did you check for 12vdc (11vdc min) at the pump? cranking

you must crank it and check,

there are 3 kinds of cars. (we assume last)

1: pump runs keyon, full time, (illegal now)

2: pump runs for 3 seconds, and stops keyon, (for priming only)

3: runs only cranked, (most cars) and runs running engine.



see that logic there?

some cars cut pump and injection with no spark. ( to cut fires)

this logic is inside the PCM brain, called firmware.

just assume the car is smarter and use #3 above. on all cars

and I win..



the scan tool will show errors cranked for 5 seconds.

does it?



now why i cant leave generic help and answer specifcially

no engine stated.

to fix them you need to know whats there, first.



the line up

1.4 L E-TEC I4 (petrol)

1.6 L E-TEC I4 (petrol)

1.8 L Family II I4 (petrol)

2.0 L Family II I4 (petrol)

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next time post the engine in your car.

open hood , look up see EPA sticker there and engine type?

USA answers... all. of mine, as this is a USA forum../

try to add to one post for one problem not make many unique posts. stay on NO START. please.

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Sincerely,

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