Ford

Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

Only four fuel injectors are firing. A gas hog, starts only…

Customer Question
Only four fuel injectors...

Only four fuel injectors are firing.

Mechanic's Assistant: Has the vehicle turned into a gas hog? And how does it start -- same as usual?

Yes a gas hog, starts only with full throttle

Mechanic's Assistant: What is the model/year of your Ford?

1991 F150 5.8

Mechanic's Assistant: Are you fixing your F150 yourself? What have you tried so far?

Yes, tested fuel injector connections only four are receiving power

Mechanic's Assistant: Anything else you want the mechanic to know before I connect you?

How do we find why the four injectors are"nt receiving impulses

Submitted: 1 year ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 1 minute by:
4/30/2017
Ford Mechanic: HDGENE, Ford Senior Master/Diesel/Trans replied 1 year ago
HDGENE
HDGENE, Ford Senior Master/Diesel/Trans
Category: Ford
Satisfied Customers: 6,664
Experience: 28 years Auto experience, Ford ,GM, Chrysler, Asian & European
Verified

Hello, and thank you for using Just Answer! My name is***** me a few moments to review your question and Ill do my best to assist you.

Ask Your Own Ford Question
Ford Mechanic: HDGENE, Ford Senior Master/Diesel/Trans replied 1 year ago

Hello, which four are not getting power, all in a row on the same side of the engine? Do all 8 injectors get a pulsing ground signal from pcm?

Ask Your Own Ford Question
Ford Mechanic: HDGENE, Ford Senior Master/Diesel/Trans replied 1 year ago

Do you need more help?

Ask Your Own Ford Question
Ford Mechanic: Jaybird61, ASE Certified Master Technician replied 1 year ago
Jaybird61
Jaybird61, ASE Certified Master Technician
Category: Ford
Satisfied Customers: 2,319
Experience: Automotive Instructor at Palm Beach State College
Verified

Hi, My name is Jay.

With the key in the on position can you check to see if all eight injectors have battery power on the red wires at the injectors? Which injectors do not receive power or pulse signal from computer?

Ask Your Own Ford Question
Ford Mechanic: Jaybird61, ASE Certified Master Technician replied 1 year ago

Do you have any other questions for me?

Ask Your Own Ford Question
Was this answer helpful?

How JustAnswer works

step-image
Describe your issueThe assistant will guide you
step-image
Chat 1:1 with a ford mechanicLicensed Experts are available 24/7
step-image
100% satisfaction guaranteeGet all the answers you need
Ask Jaybird61 Your Own Question
Jaybird61
Jaybird61
Jaybird61, ASE Certified Master Technician
Category: Ford
Satisfied Customers: 2,319
2,319 Satisfied Customers
Experience: Automotive Instructor at Palm Beach State College

Jaybird61 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

25,182 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

29,223 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.

Mike V.

Mike V.

Auto Service Technician

1,591 satisfied customers

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

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.

< Previous | Next >

Related Ford Questions
I have a 2003 F150, 5.4 Triton, my #2 cyl. is flooded with
I have a 2003 F150, 5.4 Triton , my #2 cyl. is flooded with gas, and the truck has been setting for a day in a half, I throught it was my coil pack, but I took the plug out and its flooded , what does… read more
Mike V.
Mike V.
Auto Service Technician
Subaru and Nissan factory training.
1,591 satisfied customers
I have a early 5ltr in1986 F150 the battery drains when not
I have a early 5ltr in1986 F150 the battery drains when not running no fuel injectors carberated,can the ecm be the problem … read more
roy
roy
Associate Degree
3 satisfied customers
I have 2001 crown vic 4.6l wiring on a 2009 block and i have
I have 2001 crown vic 4.6l wiring on a 2009 block and i have fuel and power at the coil packs and power at the injectors when cranking … read more
Gary
Gary
Senior Technician
Vocational, Technical or Trade School
102 satisfied customers
I think I ran out of gas and put more in and it won,t start.
I think I ran out of gas and put more in and it won,t start … read more
Diesel Doc
Diesel Doc
Diesel Technician/Shop Foreman
High School or GED
2,495 satisfied customers
Had tune up at ford service truck ran worst before tuneup
had tune up at ford service truck ran worst before tuneup was told i needed all 8 fuel injector contaminated gas. sorry ford f150 5.4 2006 … read more
Mike V.
Mike V.
Auto Service Technician
Subaru and Nissan factory training.
1,591 satisfied customers
Went to work at 4 pm truck ran good. Got off work at 4 am.
Went to work at 4 pm truck ran good. Got off work at 4 am. Truck didn't start till 6 am. Truck sounds like it has fuel problem but check fuel rail and has plenty of pressure. … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
Rear fuel tank reads on gauge but free flows into front
rear fuel tank reads on gauge but free flows into front tank, if full causes fuel to spill out of front filler tube, occasional hard starting especially if warm from running … read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
I have the same problem with my Ford Club Van- it cuts out
I have the same problem with my Ford Club Van- it cuts out every 10 to 20 seconds & then returns to running fine. I've replaced the plugs, wires, distributer & rotor, & coil & now think it may be fuel… read more
Jaybird61
Jaybird61
ASE Certified Master Technician
2,319 satisfied customers
1996 F150 5.0 engine. cranks normal has spark to plugs and
1996 F150 5.0 engine. cranks normal has spark to plugs and 39 PSI on fuel fuel rail. Did not respond to starter fluid. … read more
Edward Clayton
Edward Clayton
Associate Degree
1,033 satisfied customers
2003 explorer 4.0l #6 injector lead has power and ground
2003 explorer 4.0l #6 injector lead has power and ground with key on...starts...misfires on #6...smokes bad...gas out the pipe...thinking the PCM … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
1989 f-150 5.8 liter has duel fuel tanks, when i switch from
1989 f-150 5.8 liter has duel fuel tanks, when i switch from front to rear tanks the truck dies out after a about a mile of driving … read more
Jaybird61
Jaybird61
ASE Certified Master Technician
2,319 satisfied customers
Doesn't start but when I pump the foot feed it will
doesn't start but when I pump the foot feed it will sometimes fire but wont keep running. I replaced the inline filter but still will not run. 5.8 fuel injected motor. … read more
Jaybird61
Jaybird61
ASE Certified Master Technician
2,319 satisfied customers
Ron I have a 1991 ford f150 4x4 5.8l my fuel pump went out
Hi Ron I have a 1991 ford f150 4x4 5.8l my fuel pump went out and I replaced it, I now have 45 psi at the rail and good spark. I have power to the injectors but the truck will not fire . If I spray do… read more
Eric Gardner
Eric Gardner
Fleet Manager
Bachelor\u0027s Degree
236 satisfied customers
f150: 1991 f150 302. No start, no injector signal at crank.
1991 f150 302. No start, no injector signal at crank. New module, p/up coil. Have power to injectors also fuel pump. If you prime throttle body truck will start and run fine, injector reference is fin… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 satisfied customers
Ford F 150: mechanics..clips..starter solenoid..with fuel injection
Where do you connect a mechanics remote starter unit with aligator clips? How do you test a Ford F 150 starter solenoid on the vehicle? How can you positively identify a 1986 F 150, 302 engine with fu… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 satisfied customers
1996 Ford F150: Engine turns..40 psi fuel pressure at fuel rail
1996 Ford F150 351 5.8 Engine turns over but will not start. Has 40 psi fuel pressure at fuel rail. Spark ok, engine will run with external fuel source. Can't figure why fuel injectors don't work.… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
1991 F-150: 2wd..engine runs like only three cylinders are firing
I have a 1991 F-150 2wd with 5.8 351 engine. I am getting a 624 EPC code after start-up when the transmission is placed into gear or when the engine is revved-up. The OD off light starts blinking and … read more
Tim
Tim
Associate Degree
3,172 satisfied customers
Fuel injectors..96 (fuel pump secondary circuit failure ground
It appears the fuel injectors will not fire. I initially received error code 96 (fuel pump secondary circuit failure ground to PCM).I thought the EEC was bad so I replaced it. Still no start. I found … read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 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