Ford

Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

2001 ford ranger edge: liter..rough idle and check engine light is on…

Customer Question
I have a 2001 ford...
I have a 2001 ford ranger edge. Has a 4 liter with automatic transmission. Runs down the road fine, has a rough idle and check engine light is on. Codes are po171 system lean bank 1 and po300 random misfire, po304 cylinder 4, po305 cylinder 5, po306 cylinder 6. Can not find problem; had a ford master technician check vehicle-check valve timing ok - replaced fuel injectors - replaced all o2 sensors - replaced mass air flow sensor - replaced egr and sensor - replaced crank sensor - replaced cam sensor - install new spark plugs- new plug wires - new coil pack - new tps sensor - nothing made a difference. Can not find any vacuum leaks. What is wrong with this vehicle? Help?
Submitted: 8 years ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 2 hours by:
6/29/2010
Ford Mechanic: Fix It Man, Master Technician replied 8 years ago
Fix It Man
Fix It Man, Master Technician
Category: Ford
Satisfied Customers: 17,620
Experience: ASE Master Certified, AA Degree Auto/Diesel
Verified
HelloCustomer this is either an intake manifold gasket leak on the bottom side of the manifold or a cracked manifold. Both of these are hard to find without removing the manifold.
Ask Your Own Ford Question
Customer reply replied 8 years ago
I have had the intake off 3 times- I have replaced the intake gasket. All 3 times I have even went to the dealer to order new intake and the dealer told me they have never seen one crack or go bad.
Ford Mechanic: Fix It Man, Master Technician replied 8 years ago
Okay. If the intake is fine then you need to check the fuel pressure for problems. If the pressure is low then this will happen. It should be between 30-65 psi.
Ask Your Own Ford Question
Customer reply replied 8 years ago
I checked fuel pressure and it is 44 pounds. I have evn removed catalytic converters to see if it would run right no difference. Truck only has 70,000 miles and has been running like this for at least 15000 miles.
Ford Mechanic: Fix It Man, Master Technician replied 8 years ago
Heve you checked the compression as low compression or carbon build up on the valves will also cause this.
Ask Your Own Ford Question
Customer reply replied 8 years ago
Compression is good and I replaced the valves.
Ford Mechanic: Fix It Man, Master Technician replied 8 years ago
There are not many other things that will cause this. If all of these other systems are fine then I would suspect the variable induction system. It may be a bad actuator or the induction system may be dirty and not functioning properly.
Ask Your Own Ford Question
Customer reply replied 8 years ago
What do you mean by a bad actuator? Do you think it could be the computer? Thanks...
Ford Mechanic: Fix It Man, Master Technician replied 8 years ago
It can be the computer, but I would first check the variable intake system. Was this cleaned out when the intake was off?
Ask Your Own Ford Question
Customer reply replied 8 years ago
what is that?
Ford Mechanic: Fix It Man, Master Technician replied 8 years ago
This system swirls or changes the inducted air to increase effeciency and performance. It is loacted as shown.

graphic
Ask Your Own Ford Question
Customer reply replied 8 years ago
Our truck with a 4 liter has no lower intake. The plastic intake is one piece and bolts directly to cylinder heads.
Ford Mechanic: Fix It Man, Master Technician replied 8 years ago
I am still leaning towards a fuel system issue. Even if there is plenty of pressure there may be a flow problem. Have you checked the pressure at all rpm's?
Ask Your Own Ford Question
Customer reply replied 8 years ago
I have a auto repair business since 1976. This truck I bought new with no miles. 2001 ford ranger edge with a 4 liter. This vehicle has 70,000 miles and has been my nightmare since the 5th day I own this truck. This vehicle has a 4 liter and has no lower intake. As I've stated the parts that have been replaced and a ford master technician spent 1/2 a day here and no answers. Truck from day one has never been good on gas; but i figured i would live with that issue. Runs fine down the road; when you stop vehicle misses. Fuel pressure has been checked 3 times.
Ford Mechanic: Fix It Man, Master Technician replied 8 years ago
I am going to opt out in hopes that another tech will have better information for you.
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 Fix It Man Your Own Question
Fix It Man
Fix It Man
Fix It Man, Master Technician
Category: Ford
Satisfied Customers: 17,620
17,620 Satisfied Customers
Experience: ASE Master Certified, AA Degree Auto/Diesel

Fix It Man 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
On a 06 Ford Ranger could the coil cause rough idle And has
On a 06 Ford Ranger could the coil cause rough idle And has these codes C1148 C1158 PO300 PO305 PO304 PO306 PO316Is there something else I should check?… read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
I have a ford 02 e350 superduty 5.4 and its misfiring very
i have a ford 02 e350 superduty 5.4 and its misfiring very bad diagnostic reading said coil 3,4,5, were misfiring ive changed all three its still saying those same coil are misfiring its running very … read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Its misfiring under load on piston 1 and 3, random has 53000
random has 53000 miles new motor isntalled new sensors too … read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
Until my 5.4L engine warms up it runs rough and throws a
Until my 5.4L engine warms up it runs rough and throws a PO171 OR PO174 (bank 1 or 2 lean) codes or PO302 or PO305 OR PO306 misfire code. The misfiring cylinder is different each time. … read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Expedition: My 1999 Ford Expedition is running rough. I have
My 1999 Ford Expedition is running rough. I have replaced a coil pack, plugs, wires, fuel pump and filter. the codes that came up with the last scan arePO301, PO351, PO352, PO1405, PO171, PO174, PO304… read more
Kavey
Kavey
86 satisfied customers
2003 F150 V6 4X4-Codes po171,po175,po304,po305,po306 and misses
2003 F150 V6 4X4-Codes po171,po175,po304,po305,po306 and misses badly at highway speeds. I can clear the codes and they will stay gone until I drive on the highway and the truck gets up to operating t… read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
Ford Ranger Super Cab 4x2: 03 ford ranger 3.0 ltr, miss fire
03 ford ranger 3.0 ltr, miss fire on cyl 4 5 6+ lean on bank1, rich on bank 2. codes PO171, PO304, PO305, PO306, PO175… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
2003 ford ranger edge: idles..misfire on cylinders 3-2..fuel pressure
i have a 2003 ford ranger edge with the 3.0 v6 when i started it up this mornig it idles really rough and it threw codes for misfire on cylinders 3-2-4 and also said bank one o2 sensor to lean changed… read more
chris
chris
Ford tech at a dealer
Associate Degree
2,764 satisfied customers
2003 Ford ranger edge: 3.0L manual..squealing..fan belt
2003 Ford ranger edge with 3.0L manual trans. changed the sycro because of squealing like fan belt last month. Did notice the eng rpm at around 500 to 600 when hot at the stop light. check eing light-… read more
NicksSticks
NicksSticks
Vocational, Technical or Trade Scho
1,327 satisfied customers
hesitation..accelleration and surging at steady speeds..scanner..o2
Ihave a serious hesitation on accelleration and surging at steady speeds mostly uphill. Attached are readouts from my OBDII scanner. I'm suspicious of the B2S2 O2 sensor P0171 System Too Lean (Bank 1)… read more
Pavlin Koev
Pavlin Koev
Diagnostic Technician
High School or GED
2,687 satisfied customers
exp: trouble codes..on on board diagnostics..egr misfire 02 sensors.
I have trouble codes po171 and po174 coming up on on board diagnostics.All other things check ok exp. egr misfire 02 sensors.… read more
Paul M ASE Master
Paul M ASE Master
Automotive College
3,307 satisfied customers
1999 windstar: codes are po401, po171, po174, po304..wrong with my van
I have these problems with my 1999 windstar the codes are po401, po171, po174, po304, and po306 could tell me what these mean. and what is wrong with my van, and how would cost to fix all of this? tha… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
2005 ford: liter V6..CODE..ME KNOW WHAT I HAVE TO REPLACE ON THE CAR
hi i am working on a 2005 ford explorer 4.0 liter V6 ENGINE I HAVE CODE PO171 PO174 PO300 PO301 PO302 LET ME KNOW WHAT I HAVE TO REPLACE ON THE CAR… read more
4dwrench
4dwrench
Vocational, Technical or Trade Scho
80 satisfied customers
2001 taurus: stop lights..OBD II..5 misfirepo306- cyl 6 misfire
2001 Tarus dying at stop lights. OBD II codes- PO171-Sys to lean-bank1 PO174 - sys to lean- bank 2; PO304- cyl4 misfire po305 -cyl 5 misfire po306- cyl 6 misfire Any ideas?… read more
Mike V.
Mike V.
Auto Service Technician
Subaru and Nissan factory training.
1,591 satisfied customers
2005 ford taurus: random multiple cylinder misfire - code
5Ihave a 2005 ford taurus. I have been getting readouts of code po300 - random multiple cylinder misfire - code po304 #4 cylinder misfire-po305 #5 cylinder misfire & po306 #6 cylinder misfire- I haven… read more
CTFordTech
CTFordTech
Auto Technician
Vocational, Technical or Trade Scho
4,460 satisfied customers
ford f250: 5.4L..it miss fire..spark plugs and fuel pressure regulator
I have a ford f250, 2005, 5.4L engine it a gas engine. it miss fire on start up and give codes po175, po306 and po300. it was happing before I change the spark plugs and fuel pressure regulator… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
FORD RANGER: CYL..ENGINE LIGHT CAME..POSSIBLE FOULED INJECTOR
FORD RANGER,2002,6 CYL 3.0 ENGINE,69,000 MILES, ALWAYS HAS REGULAR 3-4000 MILE OIL/FILTER CHANGE. CHECK ENGINE LIGHT CAME ON. AUTO ZONES CODE READER SHOWED RICH/LEAN FUEL RATIO, #4 CYLINDER MISFIRE, P… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
Ranger: Litre..V6..I replaced plugs, wires, and coil pack
I code scanned my 3.0 Litre V6 Ranger and got three cylinder misfire codes (PO305, PO306, PO302). I replaced plugs, wires, and coil pack. After I cleared the computer codes, I drove a mile or so and t… read more
j_ramsey
j_ramsey
High School or GED
480 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