Ford

Have Ford Questions? Ask a Mechanic for Answers ASAP

Ask an Expert,
Get an Answer ASAP!

Ford

I have a 1995 ford ranger 3.0. It has a miss in the #4

Customer Question
I have a 1995...

I have a 1995 ford ranger 3.0. It has a miss in the #4 cylinder. I can travel 25 miles to work no problem,but if I stop in between ( for gas or coffee) the miss starts. After work all the way no problem, no miss. The #4 cylinder has 90 psi all others 150-170.

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

Not a gas hog,start after 4-6 seconds of cranking. I have in the past had a no start condition. but it would start if I held the shift lever toward park.

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

I have gotten a new coil pak, plugs And wires. I haven"t install yet. After the compression test, I was thinking of replacement. rebuilt long block.

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

Over 150,000 miles,that's it.

Submitted: 6 months ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 5 minutes by:
7/30/2017
Ford Mechanic: Jaybird61, ASE Certified Master Technician replied 6 months ago
Jaybird61
Jaybird61, ASE Certified Master Technician
Category: Ford
Satisfied Customers: 2,301
Experience: Automotive Instructor at Palm Beach State College
Verified

Hi, My name is Jay

You should have a cylinder leakage test done. This will isolate the problem to see if you have a leaking intake or exhaust valve or the piston rings are leaking. A cylinder leakage test puts air pressure into the cylinder of 120 psi and then you see if you hear leaking air from throttle body (intake valve leak) at exhaust pipe (exhaust valve leak) or from oil fill hole (piston rings) After this test then you can go from there to decide if needs valve job or decarbonize to reseal valves or the piston rings need replaced?

Ask Your Own Ford Question
Customer reply replied 6 months ago
I shot some oil in that cylinder and the pressure went up. I think it's the rings. I just don't understand why the trunk runs on all 6 until I stop and then restart develops the miss. After cool down , it's fine again.
Ford Mechanic: Jaybird61, ASE Certified Master Technician replied 6 months ago

Then you most likely have leaking piston rings if oil squirt causes pressure to rise. When your engine and oil is cool the piston and cylinders are tighter together and thicker oil helps seal and will give a small increase in compression and fuel injection will give more fuel cold. As engine warms the oil is thinner and injection gives less fuel it will not have as much power from the cylinder. Try to decarbonize engine with marvel mystery oil both in fuel tank and also suck it intake about a pint and let engine set for 15 minutes after sucking it in and then run engine. This may loosen sticking rings as long as they are not broken.

Ask Your Own Ford Question
Ask Jaybird61 Your Own Question
Jaybird61
Jaybird61
Jaybird61, ASE Certified Master Technician
Category: Ford
Satisfied Customers: 2,301
2,301 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

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
We have exhaust fluid error and check engine light came on
We have exhaust fluid error and check engine light came on in our 2015 Ford F-350 diesel. We are on vacation and pulling a 5th wheel … read more
Jagmaster
Jagmaster
Bachelor's Degree
346 satisfied customers
Smoke coming out of exhaust, a week later noticed a small
White smoke coming out of exhaust, a week later noticed a small oil leak. Then display read reduced engine power with a wrench. I can't see where the oil leak is coming from. Took to a mechanic shop t… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,139 satisfied customers
After recently having a cracked exhaust manifold replaced at
After recently having a cracked exhaust manifold replaced at local ford dealer, I get a check engine light that indicates insufficient exhaust gas flow. I have had the EGR valve replaced but the probl… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
24,320 satisfied customers
Diesel exhaust smell inside the cab in my '06 250 super
diesel exhaust smell inside the cab in my '06 250 super diesel 6.0 … read more
Cesar Jimenez
Cesar Jimenez
Owner/CEO
Vocational, Technical or Trade School
128 satisfied customers
I have a 2004 Ford Explorer 4.0 It has a PO401 code Exhaust
I have a 2004 Ford Explorer 4.0 It has a PO401 code Exhaust Gas Recirculation Flow Insufficient Detected.what doe's this mean,and what causes this code?how can I fix it?… read more
Pete
Pete
Mechanic
Construction, Plant Fitter
78 satisfied customers
I have 1997 Ford Escort. I need to replace exhaust manifold.
I have 1997 Ford Escort. I need to replace exhaust manifold. What are the procedures, torque specs, etc.… read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
12il in radiator, Tremendous amount of exhaust smoke until
12il in radiator, Tremendous amount of white exhaust smoke until warm … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,139 satisfied customers
Exhaust/Gas fumes in the cabin of my 2007 F150 as many folks
Exhaust/Gas fumes in the cabin of my 2007 F150 as many folks have described after having the plugs changed. … read more
heavy_chevy_396
heavy_chevy_396
Vocational, Technical or Trade Scho
2,518 satisfied customers
1998 F-150 4.6L OIL IN EXHAUST MANIFOLD**** i've had and
1998 F-150 4.6L OIL IN EXHAUST MANIFOLD**** i've had and exhaust leak for a while now. like a slight ticking noise coming from the passenger side. It got really bad today. ive taking the tire and shro… read more
BOBBYSS
BOBBYSS
TECHNICIAN/ADVISOR
Associate Degree
8,343 satisfied customers
You Had to have new exhaust valves in 2011 Ford Escape. #2
You Had to have new exhaust valves in 2011 Ford Escape. #2 cylinder misfire was the code originally.first replaced plugs and coils compression was a little bit lower but not extreme. I then took it to… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
24,320 satisfied customers
Staying in drive to clean exhaust system f250 2009 6.4.
staying in drive to clean exhaust system f250 2009 6.4 … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,139 satisfied customers
I have a pyrometer where the exhaust comes from the turbo.
I have a pyrometer where the exhaust comes from the turbo. At what temperature is it safe to run my 2001 F550 with a 7.3 diesel?… read more
TIM MOHR
TIM MOHR
SHOP OWNER
Master's Degree
8,037 satisfied customers
What is the exhaust volume of a police ford explorer engine
What is the exhaust volume of a police ford explorer engine per minute at the usual 600 rpm idle speed? … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
28,139 satisfied customers
I have a 95 250 with a manifold exhaust leak that i had
I have a 95 250 with a manifold exhaust leak that i had repaired once but is back. … read more
Pete
Pete
Independent Auto Technician
Vocational, Technical or Trade Scho
138 satisfied customers
What is the torque pattern and torque amount for the exhaust
What is the torque pattern and torque amount for the exhaust manifold bolts on a 2003 Ranger 2.3 L engine? … read more
Dan
Dan
Automotive Technician
Vocational, Technical or Trade Scho
25 satisfied customers
My 2008 ford f250 just sent showed "cleaning exhaust pipe"
my 2008 ford f250 just sent showed "cleaning exhaust pipe" as a message. Should I be alarmed? … read more
Kevin
Kevin
workshop foreman /master tech/mot tester
0 satisfied customers
Just purchased and need to replace right side exhaust
Just purchased and need to replace right side exhaust manifold. Been a few years since I've worked on a vehicle. And not sure of the process if one of the studs breaks in the head. … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,592 satisfied customers
Exhausted fluid system fault warning on for 10 miles and
Exhausted fluid system fault warning on for 10 miles and went off. What does it mean? … read more
Anthony
Anthony
Master Automobile Technician
Vocational, Technical or Trade Scho
8,789 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