Car

Ask a Mechanic Online and Get Answers to Your Car Questions

Ask an Expert,
Get an Answer ASAP!

Car
This answer was rated:

Vehicle runs great for 8 hour or more on high way. Begins to lack power and stalls complet

ely. Loss all power. Pull...
Vehicle runs great for 8 hour or more on high way. Begins to lack power and stalls complet ely. Loss all power. Pull over and can usually restart in about five minutes. Runs rough, but goes. Usually about a quarter tank of fuel left. No lights on dash there for no code
Show More
Show Less
Ask Your Own Car Question
Answered in 16 minutes by:
8/12/2013
Ironmike
Ironmike, ASE Master Tech, L1
Category: Car
Satisfied Customers: 3,388
Experience: 30 years GM certified, Ford certified
Verified

greetings,

Please let me know if you checked for trouble codes and what they are. There can be stored trouble codes even if the check engine light does not come on. I think we should start with checking the fuel filter and fuel pressure. If the filter is clogging it will cause a lack of power and even cause the vehicle to quit. Many times if the filter is clogged it will take out the fuel pump. The fuel pressure should be 48-55 psi.

lets start here. I would do a quick check on the fuel pressure regulator, remove the small vacuum line and check for fuel. If there is fuel on the vacuum line the regulator is bad. It still may need a pump.

let me know what you find

good luck

Ask Your Own Car Question
Customer reply replied 4 years ago


Forgot to mention that I did change the fuel filter about six month ago as well. Will check codes again with my obd II tomorrow, but as I said, I had no codes. Prior codes a year ago showed knock sensor and o2 sensor. GM dealer ran it through their code readers at $150 and told me to replace cats, did and still running into problems. Will check fuel regulator and pressure in morning and get back to you. Thanks.

You are welcome. If you want advanced scanner function for android phones I can recommend a cheap APP. I have a Samsung exhibit and use torque pro(4.95$ off google apps), it works great with a blue tooth OBD2 adapter(13$ off e-bay)

checks for codes, clears codes and shows live data

good luck

Ask Your Own Car Question
Customer reply replied 4 years ago


Hey Ironmike, Ran a check today on the fuel pressure and came up with 52 psi when it was priming and while idling it was measuring 44 psi Seemed to be ok. I had no fuel on my vacuum line to the regulator. As I mentioned before, fuel filter was replaced 6 months ago. Have never had it die on me in town. Always after driving for a few hours on highway and under a half tank or so of gas. Will stall out and restart within 5 min and run rough for some time, but clear up after a bit. Last time it struggled and wanted to die under load going up hill as well as in bumper to bumper traffic. Fuel pump is original with 250000km Don't want to spend the $300 plus if it is a shot in the dark. What you think? Also, no codes came up!

I would hook up the fuel pressure gauge and run it under the wiper arm with the hood open just on the safety of the latch. I have driven vehicles like this and was able to confirm losing fuel pressure.

You could also do the driving and get the vehicle near to when it fails and then hook up the fuel gauge and drive.

I would make sure this is not fuel related.

Next I would clean the MAF sensor. They can get contaminated and as the hot wire inside heats up the contaminates act as insulation. Most parts stores sell MAF spray cleaner.

good luck

Ask Your Own Car Question
Customer reply replied 4 years ago


Have never replaced MAF sensor, but have cleaned it big time. As far as running it with hood opened but latched or checking fuel pressure after it fails. One, I got a mechanic to check fuel flow pressure for me this am since I didn't have the tool and it cost $65 and he did it for $20, so don't have a handy meter. On running it until fail. It would take about 8 to 10 hours of driving to get it to fail. Never happens with local driving. Always during a long trip. I know your giving me your best, XXXXX XXXXX is your gut feeling on this?

My gut is the fuel pump is failing. I am guilty of this myself, running the vehicle with 1/4 tank or less leaves more of the fuel pump out of the gas. The gas helps the pump run cooler when the pump is submerged.

I hate to replace parts without confirming

Ironmike
Ironmike, ASE Master Tech, L1
Category: Car
Satisfied Customers: 3,388
Experience: 30 years GM certified, Ford certified
Verified
Ironmike and 87 other Car Specialists are ready to help you
Ask your own question now
Customer reply replied 4 years ago


Thanks for your help Ironmike, will look to change out fuel pump and hope we hit the problem. Only time and next long trip will tell :( Do appreciate your input and will let you know if she fails after repair.


 

Customer reply replied 4 years ago


Hey, Ironmike. One last question before I swop this out. When you restart with a bad fuel pump, can vehicle run rough for some time and clear up after you top off gas again. Does this keep it running cooler?

Could be a leak at the pump and or the pump working better with more fuel to cool it down.

thank you very much

Ask Your Own Car Question
Ask Ironmike Your Own Question
Ironmike
Ironmike
Ironmike, ASE Master Tech, L1
Category: Car
Satisfied Customers: 3,388
3,388 Satisfied Customers
Experience: 30 years GM certified, Ford certified

Ironmike 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:

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

Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible.

CharlesWalnut Creek, CA

As a single woman, I really appreciate an excellent and affordable opinion.
Thank you Geordie, I will not hesitate to contact justanswer in the future!

SueCharleston, WV

Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff.

JimCastleberry, FL

The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time!

Paul MCorpus Christi, TX

< Previous | Next >

Meet the Experts:

Chris (aka-Moose)

Chris (aka-Moose)

Technician

1,243 satisfied customers

16 years of experience

Ted G.

Ted G.

ASE Certified Technician

1,724 satisfied customers

20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness

George H.

George H.

ASE Certified Technician

1,537 satisfied customers

ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist

GM Tech (Cam)

GM Tech (Cam)

Auto Service Tech

669 satisfied customers

GM Grand Master Technician 2007. 14 years experience.

Amedee

Amedee

Former ASE Master Tech

2,520 satisfied customers

ASE certified tech advanced level specialist. Wisconsin certified emissions state inspector

Jerry

Jerry

Master Mechanic

2,181 satisfied customers

ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager

Richard

Richard

ASE Certified Technician

1,000 satisfied customers

12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes

< Previous | Next >

Related Car Questions
I have a 2008 Sonata which has a grinding sound coming from
I have a 2008 Sonata which has a grinding sound coming from the serpentine belt area. I'm guessing it is a pulley bearing. It is not setting off any warning lights. Wondering how much the repair might… read more
Ron Z.
Ron Z.
Vocational, Technical or Trade Scho
2 satisfied customers
My daughter has 2003 Sonata. The car is missing the dust
My daughter has 2003 Sonata. The car is missing the dust caps for the service ports on the air conditioning. I have tried everywhere no luck. Any suggestion? Also the low side does it take a special f… read more
ggrote1
ggrote1
Vocational, Technical or Trade Scho
13 satisfied customers
My 98 145000 town car is to slow What can i do to it to make
My 98 145000 town car is to slow What can i do to it to make it faster And still pass emissions test. Can i put A turbo on it and when its time For testing take it off?… read more
Stephen, MBA
Stephen, MBA
Master's Degree
166 satisfied customers
Thinking about purchasing 2005 Yukon w. 115000 miles.
Hi thinking about purchasing 2005 Yukon w. 115000 miles. Service stability and tire monitor messages on. There are aftermarket tires and rims. Should I buy this thing??… read more
Lou P. master tech
Lou P. master tech
Mercedes Benz master tech
Bachelor's Degree
649 satisfied customers
I need to know if the tint on the rear windows was factory
I need to know if the tint on the rear windows was factory installed. … read more
Gabriel Grey
Gabriel Grey
Master Service Technician
Associates
372 satisfied customers
I got a car with a subwoofer in the trunk, and it looks like
I got a car with a subwoofer in the trunk, and it looks like the power amplifier is burned up. How do i go about getting a new one and what do i do to fix this?… read more
eauto
eauto
self employed
High School or GED
74 satisfied customers
I am interested in buying a used Suburu Outback from sell by
I am interested in buying a used Suburu Outback from sell by owner. It is a 2006 with 148,000 miles. He is asking $6,500 for it. He says it has new tires and new headgaskets, has been taken good care … read more
Chad Farhat
Chad Farhat
Owner
Associate Degree
4,433 satisfied customers
I can not get heat inside the truck turn to heat can not get
I can not get heat inside the truck turn to heat can not get ac off still putting out cold air.just got the truck but the sell act like they can not help me with it. … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,403 satisfied customers
I have noticable fuel leaking from the fuel pressure relief
I have noticable fuel leaking from the fuel pressure relief on a 2006 volvo s60 2.5T. There is no CEL and not much difference in performance but the smell of gas is noticable even just standing near t… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,403 satisfied customers
Looking for Value of 1991 Chevrolet Silverado 2WD Suburban,
Looking for Value of 1991 Chevrolet Silverado 2WD Suburban, Excellent condition, flawless interior, 96300 miles (mostly annual camping trip then barn storage), no rust/excellent exterior, corduroy int… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Dealer said car had a collapsed transmission mount, but the
dealer said car had a collapsed transmission mount, but the car has only 30K miles and there is no vibration from the motor or transmission, so I think I'll wait until there is. … read more
ggrote1
ggrote1
Vocational, Technical or Trade Scho
13 satisfied customers
My timing chain broke on my 2007 Azeri. 165000 miles. Good
My timing chain broke on my 2007 Azeri. 165000 miles. Good tires. Just spent 3000 fixing air conditioning and front axles. Should I fix it or sell it for whatever? Engine damaged? Thanks. Jon… read more
David Craig
David Craig
OWNER/MECHANIC
Associates
4,403 satisfied customers
I replaced my a/c compressor. walmart sell freon gas for $5
i replaced my a/c compressor. walmart sell freon gas for $5 and the autodiscount sell it for $11, freon from autodiscount states that is "dupont". is better the expensive because it will be more coole… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 satisfied customers
I'm looking for a used Toyota or Honda car but not Prius for
I'm looking for a used Toyota or Honda car but not Prius for under $8,000. The car must have a clean title with mileage under 100,000. Besides Craigslist and Carmax, what are some other places I can l… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
I'm trying to decide if I should keep my car or sell it. I
Hi there. I'm trying to decide if I should keep my car or sell it. I replaced a number of parts over the last four years, but I'm not sure the average life span of these parts. I work from home and do… read more
sprinkles08
sprinkles08
Technician
High School or GED
11 satisfied customers
Thanks for your time. I am selling my car - this weekend -
Hi. Thanks for your time. I am selling my car - this weekend - and the front (beam) headlight went out TONIGHT!!!Obviously, since I KNOW the buyer, I do not want to sell it to them without a headlight… read more
Eric
Eric
Auto Technician
589 satisfied customers
I was in the process of selling my 2004 Mercury Sable and
Hi, I was in the process of selling my 2004 Mercury Sable and went to get the mileage off the dash , I have the title reflecting 83,169.00 miles, but in order to sell the car she needs the miles now, … read more
Kavey
Kavey
86 satisfied customers
What brand are those A/C hose clamps and who sells them? I
What brand are those A/C hose clamps and who sells them? I looked on Autozone and O-Reilly Auto parts website and I couldn't find them.… read more
Toyota Service
Toyota Service
Toyota Dealership Service & CR Manager
1,344 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