How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.
Ask Victor Your Own Question
Victor, Technician
Category: Car
Satisfied Customers: 11
Experience:  Diesel/Auto vehicle technology and management dagree. Type II and III HVAC tech, Macs certification.
Type Your Car Question Here...
Victor is online now
A new question is answered every 9 seconds

Fuel injectors..fuel pump..the electronic fuel injection control unit

This answer was rated:

i have a question my fuel injectors and fuel pump won't fire, there is no power going to the fuel pump or injectors but the fuel pump works has been tested.
this is for a 1993 land rover range rover country lwb,something electronic isnot working.
i was wondering if the electronic fuel injection control unit could have anything to do wit this problem.
Hi, Well before replaceing that a few more test need to be done first. 1 ist testing the ignition system. Once you place the key into the run position power goes from there to the pcm. is you getting voltage from there.
Customer: replied 8 years ago.
my son says he doesnt know what the pcm is,does the ignition control module have anything to do with fuel pump not coming on and the fuel injectors not firing when you turn the key on? when he turns the key to the first not the fuel pump does not come on.
The pcm is the main computer of the car kinda like you brain. if thats not getting power it cant tell the fuel pump to come on. yes the ignition control module could have something to do with the fuel pump but not injectors. the injectors has to have fuel pressure to work since the fuel pump is not pumping the injectors cant fire. back to module is that getting power?
Customer: replied 8 years ago.

my son says everything on his vehicle has a brain and he is not sure which one is the pcm,would that be the electronic fuel injection control son said he has even looked in his book that came with the range rover but cant find the pcm module.

sorry about being dense here but he is not a mechanic.

do you know where this miht be located?

Ok well the pcm is not going to be in the manual, They are located inside the car, usually in the middle under the dashbord.Im not shure on that truck but ill find out. How does the wires that connect to the fuel pump looks, does it have a wire harnest on it? and how many wires is on it?
Customer: replied 8 years ago.
he said yes they looked ok and he believes its three wires,negative,positive and the fuel gage sensor wire,just the fuel pump is not getting any fire.even on the location of electrical equipment page i dont see the pcm and on the circuit diagram of the fuel injection all i see is fuel pump relay fuse,fuel pump relay,inertia fuel shut off valve but he cant read the diagram to figure out where these parts are.
Ok well try this test while placeing a finger over the fuel pump relay, have someone to turn the ignition switch to the on position with out cranking you shoul feel and hear a click.
Customer: replied 8 years ago.

victor thanks but it is 12:58 am here in florida and my son doesnt even know where the relay switch is cause he cant read the diagrams in the book.

we have tried to find a haynes or chilton manual but cant find one for a 1993 land rover range rover country.i would love to have gave you more money for your time but i am laid off of work till august when school starts back up so this fee has left me with 30 dollars to my name and my husband has died so its up to me to pay the bills just wish i could help my son get his vehicle running.

thanks for your help and how do i make sure you get the 14.00?Diane

I understand that. Well keep me in mind! It would help if he can find that relay that would let him know if the pcm is doing its gob. If the get the click there that means there is a problem with the wires from the the relay box back to the fuel pump.. Also if he is not getting the click tell him to try to switch the relay with another one, like with the electric fan relay, then see if he gets the click. If he gets the click with switching the relay then that fuelpump relay is bad. Ima try to find out wher that relay is located and let you know. Well to be honest with you im new on here and im not shure how the pay thing works but ill find that out to.
Customer: replied 8 years ago.
thanks victor should i wait for you? i have all the time in the world?let me know cause i want that money to go to you.

Its up to you I understand its late, I think one you pay since we chated it comes to me anyway

well onece you accept it goes to my account
Customer: replied 8 years ago.

its late for me but where are you from?is it late or early?i wll stay a while longer if you can find out where that relay is i would be gratefull and i will keep you in mind victor

so when i get more cash i can come back to this site and ask for you.

Ok well im In North Carolina, Im trying to find out now about the relay


Customer: replied 8 years ago.

oh wow so its pretty late there too,i met my real dad years ago and he rented houses at cape hatteras what a beautiful state.

you can reach me at [email protected] if we get cut off im on dial up through net zero so never know when it cuts me off till its to late.

Ok well its not letting me see your email address, yea its an ok place. ill be takeing a vacation to Florida next month
Customer: replied 8 years ago.

thanks victor sorry it wont let you see my email well have a good trip when you get here

i need to quite wasting your time.where can i go to look where the parts are located

since i cant find a manual or read this diagram in his book?

on the diagram it seems the fuel pump relay fuse and the fuel pump relay are close to each other the fuel pump relay fuse is under the right seat

I wish I could see your diagram, and my service manual is not working on my coputer for some what reason. A good place to go is a sears if one is close by mybe an autozone, or advance just ask them to give you an ideal where its located
Victor and 4 other Car Specialists are ready to help you
Customer: replied 8 years ago.

thanks victor zephyrhills has a small sears,dade city has a autozone

reply back so i can hit accept so you can get paid what little i put in.

i will call it a morning for now.god bless you and thanks so much for your time.

Diane Fussell dade city florida

Its no problem, Well if you want you can give call sears there to get the phone number to the sears at south point in Durham N.C and ask for victor
Customer: replied 8 years ago.
will do have a good morning victor
same to you!