Ford

Have Ford Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Ford

Where is the ECM located on a 1994 Ford Ranger

Customer Question
I can''t get my 1994...
I can''t get my 1994 Ford Ranger XLT to start. It was running fine but then began to break up at excelleration. I replaced the 2 O2 sensors, Mass Air Flow Sensor, Throttle Position Sensor. It continued to run rough and gradually got worse. Then it began to sometimes run and sometimes not even start. Now it is dead. I can turn it over and spray starting fluid into the air flow intake and the engine will run as long as I keep spraying so there is spark. I noticed I could no longer hear the electric fuel pump come on when I turned on the ignition. I removed the bed and put a meter on the fuel pump and only have 5 volts when the ignition is on and the pump will not run. I located the emergency fuel shut off switch and tested it and it tests ok. I ran a wire directly to the fuel pump from the battery and the pump comes on and fuel circulates throughout the system. But when I try and start the car, it still will not start unless I spray starting fluid into the air intake. I think the ECMs bad
Submitted: 9 years ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 6 minutes by:
2/5/2008
Ford Mechanic: Chris (aka- Moose), Technician replied 9 years ago
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 49,929
Experience: 16 years experience
Verified

Here is the ECM/PCM location.

 

graphic

Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 49,929
Experience: 16 years experience
Verified
Chris (aka- Moose) and 87 other Ford Specialists are ready to help you
Ask your own question now
Customer reply replied 9 years ago
What is your troubleshooting opinon based on what I have tried so far? Does these symptoms indicate a breakdown and then failure of the ECM?
Ford Mechanic: Chris (aka- Moose), Technician replied 9 years ago

I would start by looking into the fuel relay since the fuse sends the 12 volts to the fuel pump when the relay is commanded. you may have a command concern to the relay or a bad relay.

graphic

graphic

Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 49,929
Experience: 16 years experience
Verified
Chris (aka- Moose) and 87 other Ford Specialists are ready to help you
Ask your own question now
Customer reply replied 9 years ago
I already tried swapping relays and even put a volt meter on the output of the relay and the relay is clicking and sending 12vdc when the ignition is on. However, even when I manually send power to the fuel pump and get the fuel to the injectors, the engine will not fire unless I spray starting fluid into the air intake.
Ford Mechanic: Chris (aka- Moose), Technician replied 9 years ago
What fuel pressure are you getting at the injectors. Since you just stated the fuel pump is getting 12 volts so it is running.
Ask Your Own Ford Question
Customer reply replied 9 years ago
I am not sure, although when I disconnect the steel braided fuel hose connector in the engine compartment that connects the injectors to the fuel line, and then manually put 12vdc tot he pump, fuel shoots into the air.
Ford Mechanic: Chris (aka- Moose), Technician replied 9 years ago
Have you checked injector signal pulse.
Ask Your Own Ford Question
Customer reply replied 9 years ago
No I have not done that. I just concluded there probably is no signal since I know there is spark and fuel is not getting to the cylindars, and even when I force the pump to pump fuel, it still does not fire, hence my conclusion the ecm is bad based on the decline in engine performance then total failure. What should the pulse read?
Ford Mechanic: Chris (aka- Moose), Technician replied 9 years ago
You can check the pulse with a 12 volt light bulb connected to any of the injector connectors. One wire is hot from the PCM relay and the other wire is signal ground pulse from the PCM. The PCM knows when to pop the injectors via cam sensor.
Ask Your Own Ford Question
Customer reply replied 9 years ago
If no pulse, what would be your conclusion? Is that pulse generated by the ECM? and is the fuel pump controled by the ECM? being that there seems to be 2 problems maybe related or maybe coincidental.
Ford Mechanic: Chris (aka- Moose), Technician replied 9 years ago
If you have outgoing 12 volts from the fuel pump relay then you have a fuel concern between the relay and the pump and the inertia switch is in the middle there. The PCM tells the relay to turn on. The PCM does generate the injector pulse but it maust get cam position signal to know when to fire.
Ask Your Own Ford Question
Customer reply replied 9 years ago
OK, Thank you for your time and assistance. I will check the pulse, inertia switch and the cam position signal. I will check back with you after that. Thanks for all your help and I look forward to your assistance in the future. Great service.
Ford Mechanic: Chris (aka- Moose), Technician replied 9 years ago
Your welcome
Ask Your Own Ford Question
Customer reply replied 9 years ago
Chris, I just noticed I had the year wrong. It is a 1992 Ford Ranger, not a 1994. Does the above locations and diagrams still apply?
Customer reply replied 9 years ago
IF not can you update the wireing and location for me?
Ford Mechanic: Chris (aka- Moose), Technician replied 9 years ago
graphicgraphic
Ask Your Own Ford Question
Ask Chris (aka- Moose) Your Own Question
Chris (aka- Moose)
Chris (aka- Moose)
Chris (aka- Moose), Technician
Category: Ford
Satisfied Customers: 49,929
49,929 Satisfied Customers
Experience: 16 years experience

Chris (aka- Moose) is online now

A new question is answered every 9 seconds

How JustAnswer works:

  • Ask an ExpertExperts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional AnswerVia email, text message, or notification as you wait on our site. Ask follow up questions if you need to.
  • 100% Satisfaction GuaranteeRate the answer you receive.

JustAnswer in the News:

Ask-a-doc Web sites: If you've got a quick question, you can try to get an answer from sites that say they have various specialists on hand to give quick answers... Justanswer.com.
JustAnswer.com...has seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like justanswer.com/legal
...leave nothing to chance.
Traffic on JustAnswer rose 14 percent...and had nearly 400,000 page views in 30 days...inquiries related to stress, high blood pressure, drinking and heart pain jumped 33 percent.
Tory Johnson, GMA Workplace Contributor, discusses work-from-home jobs, such as JustAnswer in which verified Experts answer people’s questions.
I will tell you that...the things you have to go through to be an Expert are quite rigorous.

What Customers are Saying:

AlvinC answered a question about my Ford truck that only someone with an in-depth knowledge of his subject would have known what was going on.

Rich DUSA

Because of your expertise, you armed me with enough ammunition to win the battle with the dealer. They are installing a fuel filter and fuel pump at no charge to me.

MollyUSA

I needed help with my car on Saturday morning....got a response in 5 minutes, and it was the perfect solution. Thanks again to your service.

Jason V.Kirkland, WA

I do know, after going though this with JustAnswer, that I can somewhat trust my mechanic but I will always contact you prior to going there.

BRNew Jersey

I would (and have) recommend your site to others I was quite satisfied with the quality of the information received, the professional with whom I interacted, and the quick response time. Thanks, and be sure that I'll be back whenever I need a question answered in a hurry.

Stephanie PElm City, NC

used your service this weekend with "Trecers" help. thank you ,thank you, thank you. replaced an A/C fan motor. Local Auto Zone had part. $15.00 "tracer" fee and $40.00 for parts, I saved several hundreds of dollers at a shop. i will recommend you and use you in the future.

David L.Richmond, TX

9 dollars, 2 hours of my time, and I drove away. Your diagnosis was right on the mark. Thank you so much.

PhilMarysville, CA

< Previous | Next >

Meet the Experts:

Ron

Ron

ASE Certified Technician

24,320 satisfied customers

23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs

Chris (aka- Moose)

Chris (aka- Moose)

Technician

49,929 satisfied customers

16 years experience

John Mc

John Mc

Ford Technician

5,495 satisfied customers

19 years Ford Lincoln Mercury experience

Chuck

Chuck

ASE Certified Technician

1,685 satisfied customers

33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance

Cam

Cam

Journeyman Automotive Technician

10 satisfied customers

GM Grand Master Technician 2007. 14 years Automotive experience.

Richard

Richard

ASE Certified Technician

1,524 satisfied customers

12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.

Mike V.

Mike V.

Auto Service Technician

1,380 satisfied customers

25 years experience on all makes and models, Licensed NYS Inspector.

< Previous | Next >

Related Ford Questions
The engine will not turn over. No spark, no check engine, no
I followed the procedure in the handbook -- 3 trials - -then tried the flooded engine procedure (although I did not see how that could have happened). The electronics are working, it just won't crank … read more
Matt
Matt
Engineer
Bachelor\u0027s Degree
5 satisfied customers
Ron. 1999 Honda Accord with a 3.0l engine. Is this a
Ron. 1999 Honda Accord with a 3.0l engine. Is this a interference motor that will bend the valves if the timing belt brakes while going down the highway?… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
24,320 satisfied customers
2001 ford e150 w/4.2 engine. Can I remove the engine and
2001 ford e150 w/4.2 engine. Can I remove the engine and tranny as one unit through the front- the engine is sized so I can't get to the torque converter bolts … read more
roy
roy
Associate Degree
3 satisfied customers
The engine is not turning, it has the engine check light,
the engine is not turning, it has the engine check light, battery, and oil light on. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
My ford f150 engine light is blinking. The service engine
the service engine soon light flashes and then remain on … read more
kalamykid
kalamykid
Pactor automotive
Vocational, Technical or Trade Scho
97 satisfied customers
Engine stalls below 1000 rpm. No engine light, stalls going
no engine light, stalls going into reverse and at stop light … read more
Pete
Pete
Mechanic
Construction, Plant Fitter
57 satisfied customers
When I first start the engine and start driving the engine
when I first start the engine and start driving the engine comes up to temp and then shortly after reaching that temp will start overheating. I turn on heater in the cab which will bring engine temp b… read more
Peter Bagley
Peter Bagley
master technition
Vocational, Technical or Trade School
1,015 satisfied customers
I have had an engine knock in the lower part of my engine
I have had an engine knock in the lower part of my engine for last couple month, after running on low oil. after replacing oil knock got better, but has come back and seems to increasingly get worse. … read more
Mike V.
Mike V.
Auto Service Technician
High School or GED
1,380 satisfied customers
There's a humming or groaning noise from the engine
There's a humming or groaning noise from the engine compartment, it varies in intensity day to day, but becomes higher pitched as the engine speed increases. It does not seem to change as the steering… read more
Mechanic01
Mechanic01
1,703 satisfied customers
Engine malfunction warning light comes on and engine losses
engine malfunction amber warning light comes on and engine losses power .engine restarts after about five minuets … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,433 satisfied customers
It is backfiring through the. My engine is backfiring
Yes I am. I turned the engine by hand to 0 degrees on the crank and I took the distributor cap off and adjusted it to where the 1 cylinder plug is above the rotor and it backfires through the carburetor … read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
24,320 satisfied customers
Car runs well, engine purrs, so don't think it's an engine
Car runs well, engine purrs, so don't think it's an engine efficiency issue. Odometer typically always showed approximately 390-410 miles to empty when gas tank was filled up. All of a sudden, it only… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
49,929 satisfied customers
My engine is a 70 302, was a 2bbl carb, now a 4bbl. engine
my engine is a 70 302, was a 2bbl carb, now a 4bbl. engine fires great, but after driving awhile, it wants to stall at idle slow braked … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
Service engine light just came on and engine stalls at an
Service engine light just came on and engine stalls at an idle … read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
Engine will spin but it won't start. No there's no
engine will spin but it won't start JA: Have you checked the battery, particularly the terminal connections? Are they corroded? Customer: no there's no corrodison JA: What is the model/year of your Fo… read more
Kenny Z
Kenny Z
Ford Senior Master Technician
High School or GED
16 satisfied customers
2006 f 350 have to rev engine high to keep engine from
2006 f 350 have to rev engine high to keep engine from stalling when engaging clutch. Clutch does not engage smooth … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
49,929 satisfied customers
2012 FordFusion - start engine in park horrible jet engine
2012 FordFusion - start engine in park horrible jet engine roar starts I'm so scared I turn off car. Checked at ford dealer. No history found. I can't drive it from my terror. Husband has driven it wi… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Coolant leaks at rear of engine. Engine not run for last
coolant leaks at rear of engine. Engine not run for last several days so no pressure in engine. … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Disclaimer: Information in questions, answers, and other posts on this site ("Posts") comes from individual users, not JustAnswer; JustAnswer is not responsible for Posts. Posts are for general information, are not intended to substitute for informed professional advice (medical, legal, veterinary, financial, etc.), or to establish a professional-client relationship. The site and services are provided "as is" with no warranty or representations by JustAnswer regarding the qualifications of Experts. To see what credentials have been verified by a third-party service, please click on the "Verified" symbol in some Experts' profiles. JustAnswer is not intended or designed for EMERGENCY questions which should be directed immediately by telephone or in-person to qualified professionals.

Show MoreShow Less

Ask Your Question

x