Ford

Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

This answer was rated:

1996 Ford F250 5.8 engine intermittent no start

Customer's question: Truck cranks over but will not start at times. Intermittent fault

Mechanic's answer: Advised to check what is missing when it will not fire up when cranking. Traced to ignition circuit. Possible PCM fault. Supplied pinpoint tests for no spark to verify if it was a PCM issue.

Read full interaction below »
Ask Your Own Ford Question

Resolved Question:

Intermittent engine cranks no start

Mechanic's Assistant: Will the headlights turn on? Is the battery fully charged?

Yes

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

96 f250 5.8l gas

Mechanic's Assistant: Are you fixing your F250 yourself? What have you tried so far?

So far replaced the fuel pressure regulator, no change, today I replace the ignition control module located on drivers side inner fender, worked perfect, drove to a friends house about 3 blocks away turned it off . about two hours later went out to drive home and it started sluggish and died backing out of his driveway. wont start again

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

Yes it has a state issued VIN (Missouri) so I cant use VIN as a reference

Submitted: 4 months ago.
Answered in 6 minutes by:
3/9/2018
HDGENE
HDGENE, Ford Senior Master/Diesel/Trans
Category: Ford
Satisfied Customers: 6,576
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

Hello, when it cranks and wont start, do you have fuel pressure and spark? Have you tested for diagnostic trouble codes? When it cranks and wont start, when you cycle the key to on, does the check engine light turn on when you turn the key to on, you hear the fuel pump prime a few seconds? Then when you crank it over does the check engine light go out when cranking?

Ask Your Own Ford Question
Customer reply replied 4 months ago
ok
have not checked for spark, if I turn key on engine off fuel pumps on either tank will prime and shut off. If i press down on the pin in the shrader valve on the fuel rail it just dribbles out. the check engine light comes on and goes out while cranking

Ok, there should be a good blast of fuel pressure, 30 psi at the rail. If it does it on bth tanks, it could be an issue with both fuel pumps or a blockage in the fuel system such as the fuel filter.

Ask Your Own Ford Question
Customer reply replied 4 months ago
The truck is not at my home right now but will replace the filter in the morning. should I also try using starting fluid to test for spark?

Pull off a spark plug wire and stick a spark plug in it and crank it over with it laying on the engine, should have a good blue spark. When you remove the fuel filter, you should be able to blow through it easy like the new one. If it is plugged you will know.

Ask Your Own Ford Question
Customer reply replied 4 months ago
ok Ill try that. I was thinking that was the issue because sometimes if I would let it rest for a while it would start just fine. Thank you for your help . this has eased my mind enough I might be able to get some sleep tonight.

No problem, you can also leave the fuel filter line disconnected and cycle the key and catch the fuel, the fuel pumps should give a good blast a few seconds when the key is cycled to on. If you need more help or information please let me know. If I was helpful, please use the 5 stars above to leave a positive rating.

HDGENE
HDGENE, Ford Senior Master/Diesel/Trans
Category: Ford
Satisfied Customers: 6,576
Experience: 28 years Auto experience, Ford ,GM, Chrysler, Asian & European
Verified
HDGENE and 87 other Ford Specialists are ready to help you
Ask your own question now

Thank you. Let me know if you need more help.

Ask Your Own Ford Question
Customer reply replied 4 months ago
Thank you for your help ion this issue. Ir was the fuel line filter, 2,5 hours to remove it and 2,5 seconds to install the new one. Someone needs to shoot the guy who invented that Ford quick disconnect (nor so quick).
I hear ya! But I'm glad you got it fixed cheap! Thank you for the update!
Ask Your Own Ford Question
Customer reply replied 4 months ago
I hate to be the bringer of bad news. (something my dad used to tell me I do so well) Its doing the same thing again only this time when I push down on the schrader valve gas hits the hood. I am assuming Im getting fuel. It is completely intermittent with no pattern at all. Sometimes it will die if I depress the gas pedal to gun the engine. Sometimes it will start right back up, other times I may need to let it rest an hour or two. Im at a complete loss.
When it doesn't start you need to see what is missing. You said you have fuel pressure regulator so it's a question of if it has a good blue spark or injector pulse
Ask Your Own Ford Question
Customer reply replied 4 months ago
I replaced the ignition comtrol module early on when this started. Ill check for soark the next time it fails. Its been working good today.

very good, if the whole ignition is new and you have no spark, but have an rpm signal, it could be a bad pcm.

Ask Your Own Ford Question
Customer reply replied 4 months ago
It doesnt have any spark.

Ok, check to see if the check engine light goes out when cranking, it should come on when the key is turned on and go out when cranking if the pcm is getting an rpm signal from the distributor. Check for codes, if you dont have a scan tool, use this procedure to count the check engine light to check for codes. If the pcm is getting an rpm signal it should fire the coil.

Ask Your Own Ford Question
Customer reply replied 4 months ago
The check engine light is not going out while the engine is cranking. Have not checked for codes yet using that procedure. I can do that tomorrow when i can get help.

Very good, might be a problem with the pickup coil in the distributor sending the rpm signal or wiring in between the distributor, ignition module and pcm to the coil. let me know what you find and we will go from there.

Ask Your Own Ford Question
Customer reply replied 4 months ago
Im getting one code... 722
Customer reply replied 4 months ago
Im sorry make that two codes 72 and 21. But those codes aren't making any sense at all to me.
Hmm. Those codes don't make sense. This does have the eec I'm diagnostic connector, or does it have the 16 pin dlc under the glove box?
Ask Your Own Ford Question
Customer reply replied 4 months ago
It has the OBD 1 diagnostic system. Connector under the hood, and after getting those codes the stupid thing started right up. I let it idle for about 30 minutes to bring everything up to temperature and re checked the codes. still 72 and 21.
21 is an ect engine coolant and 72 is a map sensor 2 digit code for 1993 model. 96 should be a 3 digit trouble code
Ask Your Own Ford Question
Give me a few hours to be done with work and I'll give you info for testing no spark
Ask Your Own Ford Question
Customer reply replied 4 months ago
I was told that the 96 f250 4x4 kept the old obd1 system and they didnt go to the newer system until late 1997. I have access to a new obd2 scanner but no place to hook it up on this truck.
that's correct. Give me a little bit and I'll give you more information
Ask Your Own Ford Question

Ok attached is pinpoint test A for no spark. This will help determine whats wrong with the ignition system.

e2353598-8990-4950-97aa-...gife235359...gif2ff87755-1e40-42df-8d3d-...gif2ff8775...giff5f256a5-dae0-41ee-b644-...giff5f256a...gif024ea81a-33f4-4913-8368-...gif024ea81...gifc0903896-45aa-401d-87b3-...gifc090389...gif5128ab6d-a82c-4bff-a33e-...gif5128ab6...gif31114e00-65d3-461a-97fe-...gif31114e0...gif918b7f77-a788-42d9-afee-...gif918b7f7...gif
Ask Your Own Ford Question
Customer reply replied 4 months ago
Where do i get a diagnostc harness and breakout box to make these tests? Is this something i can jury rig? I am an electronics technician with over 30 years experience. Would you by chance have a schematic of these items.

These tools are not easily found, they are dealer tools. The idea of the test is to test the circuit from one end to the other. here is a schematic of the ignition circuit.

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 HDGENE Your Own Question
HDGENE
HDGENE
HDGENE, Ford Senior Master/Diesel/Trans
Category: Ford
Satisfied Customers: 6,576
6,576 Satisfied Customers
Experience: 28 years Auto experience, Ford ,GM, Chrysler, Asian & European

HDGENE 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

25,022 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

28,993 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

1,556 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
Very rough idle. when parked up with nose, takes 5-6 times
very rough idle. when parked up hill with nose, takes 5-6 times cranking to start. when parked nose down or flat, it starts right up … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,993 satisfied customers
1996 econoline 5.8l intermittently dies (usually when warm)
1996 econoline 5.8l intermittently dies (usually when warm) loses pip signal. Sensor on front of engine by harmonic balances changed and ignition module on inner fender changed. … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,281 satisfied customers
1991 Ford Ranger, 4.0 This vehicle is kind of marked for
1991 Ford Ranger, 4.0 This vehicle is kind of marked for restoration someday, but for now, we occasionally drive it during the summer just to keep things loose and lubricated. I took it out of storage… read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
Husband uses my truck often .. F250 diesel .. its been dying
Husband uses my truck for work often .. F250 diesel .. its been dying or not starting over last 2 weeks and would not start at gas station down the road after driving home for the past hour from work.… read more
TIM MOHR
TIM MOHR
SHOP OWNER
Master's Degree
8,037 satisfied customers
F 250: I have a 2004 f250 6.0 diesel had it about two weeks
I have a 2004 f250 6.0 diesel had it about two weeks drove fine until sat started fine drove about 12 miles and lossed power and died got it home was tolded to change the fuel fillters and it started … read more
James
James
Bachelors degree automotive technology with minor in diesel
3,578 satisfied customers
ford f250 diesel: 1985 ford f250 diesel 6.9l, ran 1 month ago
1985 ford f250 diesel 6.9l, ran 1 month ago filled up drove 15 miles stopped and it died started back up and died again and again. got it running drove back home barely (died in the driveway) and star… read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
F250: 1995 Ford F250 4wheel ran and started perfect untill
1995 Ford F250 4wheel ran and started perfect untill now. Wont even turn over, click or make any noise for that matter when tryed to start. Tryed jumping it, put a 12 hour charge on battery and a lot … read more
John Mc
John Mc
Ford Technician
Vocational Trade School
5,495 satisfied customers
96 f150: die going down the road..coil going..distributor..start right
I have a 96 F150 5.0 and it will sometimes die going down the road and there is no spark off the coil going to distributor. It can sit for a while and start right up. I can drive it to work 3 miles fr… read more
Capt.Cory
Capt.Cory
LICENSED CHARTER CAPTAIN
High School or GED
2 satisfied customers
1994 ford Ranger: V6..parked..died wouldnt start..someone tow me
I have a 1994 ford Ranger, 4.0 V6 . I went to lunch the other day and left it running while I ate the temp gauge showed it was a little warmer than normal so i decided to drive it a little bit then th… read more
John Mc
John Mc
Ford Technician
Vocational Trade School
5,495 satisfied customers
1990 ford f-150 xlt: drove..parked..it wont start finally jump..cap
i have a 1990 ford f-150 xlt lariot. i drove it to a friends house (500 feet away) parked it nothing wrong with it. came back a couple hours later and it wont start finally jump if off using the cilan… read more
Bob
Bob
Vocational, Technical or Trade Scho
205 satisfied customers
2002 F250 Super duty: I need a Glow plug relay or a GPCM, or are they
I have a 2002 F250 Super duty 7.3. Do I need a Glow plug relay or a GPCM, or are they the same. Bought the truck in Oregon, living in Nevada now. Don't know about omissions in Oregon or Nevada. I know… read more
John Crouch
John Crouch
lead senior master tech
Vocational, Technical or Trade Scho
1,383 satisfied customers
Ford f250: my way home truck drove perfectly fine..stop sign..shake
I have an 03 ford f250 sd larriat fx4. It has been an amazing truck , but I was on my way home truck drove perfectly fine. I got to the stop sign before my house and all the sudden the truck went into… read more
Dodge expert
Dodge expert
ASE MASTER TECH, REPAIR FACILITY OWNER
High School or GED
3,636 satisfied customers
96 mustang gt: i drove it a mile..my battery cable clamps..fuses
i have a 96 mustang gt and i was driving it and turned a corner and the engine died but the cooling fan came on i drove it a mile so it shouldnt have gotten hot enough for it to come on and it comes o… read more
cardoctor71
cardoctor71
Owner
High school graduate
51 satisfied customers
2000 F250: engine off it wont start..Plenty of gas new battery.
I have a 2000 F250 gas truck. It starts and runs then after turning engine off it wont start. Plenty of gas new battery. After 3 hours it started, drove 3 blocks dies, wont start. Fuel pump?… read more
Fordanswerman
Fordanswerman
Ford Senior Master Technician retired
Associate Degree
2,912 satisfied customers
89 ford f-250: check engine light..gauges worked..Tow..drove
'89 ford f-250 5.8L, getting on or off the hwy it losses power and dies, pulled to side of road, started right up but throttle response was erratic and after a minute dies off again. No check engine l… read more
John Mc
John Mc
Ford Technician
Vocational Trade School
5,495 satisfied customers
94 ford F250: turbo..it idles just fine..engine light comes..drove
I have a 94 ford F250 7.3 DI turbo diesel.I power washed the engine bay 3 days ago and the truck will not stay idleing when the engine light is off, however when the engine light is on it idles just f… read more
Dieseljunky2
Dieseljunky2
Locomotive Mechanic
Ford Certified Technician
310 satisfied customers
1999 F250: 7.3 liter..liter engine..the truck quit running..restart
I have a 1999 F250 diesel with the 7.3 liter engine. the truck quit running as I was driving and would not restart immediately. I towed it home about an hour later and it restarted but only ran for ab… read more
Brian
Brian
Ford Senior Master Certified Shop Forema
Vocational, Technical or Trade Scho
1,228 satisfied customers
1984 E-150: Van..it died pulling into the gas station..it towed home
I have a 1984 E-150 Van. Yesterday it died pulling into the gas station, so I thought it had run out of gas, but then after putting gas in I could not get it started. So I had it towed home. Later tha… read more
EMRSR
EMRSR
High School or GED
138 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