Ford

Have Ford Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Ford

1988 ford ranger 2.9 (my neighbors) He has replaced both

Customer Question
1988 ford ranger 2.9 (my...
1988 ford ranger 2.9 (my neighbors) He has replaced both relays, and the frame rail fuel pump. I went to look at it and tested high and low circuits both have power, then I put a jumper wire on terminals #3 and #4 and I can hear rear fuel pump kick in, there is also power at the frame rail pump, I ran a hot wire with test light to ground on the wires to frame rail and ground is good. why no power when relay is installed what am I overlooking.
Submitted: 1 year ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 6 minutes by:
3/20/2016
Ford Mechanic: Juan Crespo, Tech Trainer replied 1 year ago
Juan Crespo
Juan Crespo, Tech Trainer
Category: Ford
Satisfied Customers: 1,529
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European
Verified

What are we trying to diagnose? Cranks but won't start? or no fuel pressure at the rail?

Ask Your Own Ford Question
Customer reply replied 1 year ago
cranks no start, and no power to fuel pump with out jumping terminals
Ford Mechanic: Juan Crespo, Tech Trainer replied 1 year ago

Sorry, but I'm confused; are you saying the engine won't start even if you jump the fuel pump? Are you checking fuel pressure with a tester connected to the rail? Have you made sure there is compression, spark and injector pulse and the only cause of the no-start is lack of fuel pressure?

Ask Your Own Ford Question
Customer reply replied 1 year ago
I will be back in 15 minutes
Customer reply replied 1 year ago
I am back
Customer reply replied 1 year ago
OK, I am troubleshooting a 1988 ford ranger with 2.9 cranks but wont start but will start if you spray starting fluid in it and run until either is burned out.
It has had relays and the frame rail fuel pump replaced, then I was asked to see if I could get it going, I removed the relay and checked for power on terminals #2 & 4 both had power with key on. Then I jumped terminal #3 & #4 and could hear the rear fuel pump come on- at that I figured the inertia switch was ok. I also checked for power at the frame rail fuel pump and found power to it with key on, I also ran power to check the ground at this fuel pump and it was good. when I remove jumper and install relay I have no power to pumps what am I overlooking.
Customer reply replied 1 year ago
when I remove jumper and install relay I have no power to pumps what am I overlooking.
Ford Mechanic: Juan Crespo, Tech Trainer replied 1 year ago

Well, as it is, by the starting fluid test we know compression and spark are good. What we still don't know is whether or not the pumps can deliver the 35-45 psi fuel pressure the injectors require, or whether or not those injectors are being pulsed open by the computer.

So here is what I would do; I'd go to the parts store and buy a Noid light (less than $15) to check for injector pulse and I would also borrow a fuel pressure tester to check what kind of pressure is going to be available at the rail once I jumper both fuel pumps - or just borrow the fuel pressure tester and gamble on the injector pulse.

Or, you can gamble on both the fuel pumps being good and the injectors being pulsed and just repair the fuel pump circuit.

It's up to you, I'm on your side and will help you with whatever you choose to do.

Ask Your Own Ford Question
Customer reply replied 1 year ago
Hi, please credit back my money less the deposit. Nothing personal but you didn't really address my question you just sort of gave a vague response. (the problem was a bad ground at the rail pump) Thanks - Steve
Ford Mechanic: Juan Crespo, Tech Trainer replied 1 year ago

Nothing personal indeed. Please refer to customer support for any money matters.

Ask Your Own Ford Question
Ask Juan Crespo Your Own Question
Juan Crespo
Juan Crespo
Juan Crespo, Tech Trainer
Category: Ford
Satisfied Customers: 1,529
1,529 Satisfied Customers
Experience: A.S.E. Master Technician, Advanced Level, Emissions - Asian, Domestic, & European

Juan Crespo 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

28,139 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
Peter Concannon
Peter Concannon
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
1,008 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
1,645 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
4,393 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
Vocational, Technical or Trade School
28,139 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
Vocational, Technical or Trade School
28,139 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