Ford

Have Ford questions? Ask a mechanic for answers ASAP

Ask an Expert,
Get an Answer ASAP!

I have a 2004 Lariat F150. Stalls at low RPM. %.4 Triton.

Customer Question
I have a 2004...

I have a 2004 Lariat F150. Stalls at low RPM. %.4 Triton. Have read hundreds of complaints. So many that it should have been a recall. But there are thousands of these engines on the road today. What is the fix??

Mechanic's Assistant: Is the check engine light on? Does the car stall at idle or when driving?

Engine light is on and off. No codes come up

Mechanic's Assistant: Are you fixing your F150 yourself? What have you tried so far?

Well my mech doesnt know. Starts right back up and runs fine for awhile. GOOGLE it!

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

There must be an easy fix for this prob. because It runs great when it wants too.

Submitted: 10 months ago.Category: Ford
Show More
Show Less
Ask Your Own Ford Question
Answered in 3 minutes by:
9/29/2017
Ford Mechanic: Gunvir Singh,
 replied 10 months ago
Gunvir Singh
Category: Ford
Satisfied Customers: 2,013
Experience: Master Tech at Kennesaw Auto Tech
Verified

Hello, let me review your request. Please stand by.

Ask Your Own Ford Question
Ford Mechanic: Gunvir Singh,
 replied 10 months ago

/does the issue occur more when engine, cold, warmed up or does not matter?

Ask Your Own Ford Question
Customer reply replied 10 months ago
This is a very common problem with the Triton. Google it. Gonna reset the idle memory next after Throttle body cleaning. Figured a Ford Mech would know about this 5 .4 Prob..I'm knew to this truck and wasnt aware of this engine prob. Cant believe you don't know.
Customer reply replied 10 months ago
No. I'm already spending money for an answer I don't think Ill get.
Customer reply replied 10 months ago
You've never heard of this???
Ford Mechanic: Gunvir Singh,
 replied 10 months ago

The most common issue is a faulty idle contol valve built inside the throttle body. have you tested that?

Ask Your Own Ford Question
Customer reply replied 10 months ago
how do you know that? Ive been online for weeks researching what it is cus thousands of people have this issue and not once did that come up. Tell me where this Valve is.
Ford Mechanic: Gunvir Singh,
 replied 10 months ago

The idle contol valve is built inside the throttle body assembly. To test the valve the data change will need to to be checked when the idle is fluctuating. If it goes below specifications the thhrottle body will need replacement.

Ask Your Own Ford Question
Customer reply replied 10 months ago
Read many responses about replacing the throttle body for many $$s. And didnt solve the prob. Replacing a throttle body is easy. You don't think a good cleaning and relearn would work?
Or do you know for sure that those valves were defective?
Ford Mechanic: Gunvir Singh,
 replied 10 months ago

I have ran into the similar issue multiple times and most of the time the solution is throttle body replace and relearn. However i will recommend to make sure there are no vacuum leaks present and fuel pressure is within specificatons.

Ask Your Own Ford Question
Ford Mechanic: Gunvir Singh,
 replied 10 months ago

Do you have any other questions?

Ask Your Own Ford Question
Ford Mechanic: Gunvir Singh,
 replied 10 months ago

Please read this:

Understand it's not one answer and done. We can communicate back and forth many times.

1. I am an independent auto mechanic and do not work at or for Just Answer.

2. When you're pleased or happy with my assistance or efforts to help you, at the top of the screen please rate me .

3. I only get credit for my work from your question value deposit when you rate me on this screen. Rating does not close the post and you're more than welcome to follow up.

Thanks for using Just Answer

Ask Your Own Ford Question
Ford Mechanic: Gunvir Singh,
 replied 10 months ago

Hello, just checking if any updates?

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 Gunvir Singh Your Own Question
Gunvir Singh
Gunvir Singh
Gunvir Singh
Category: Ford
Satisfied Customers: 2,013
2,013 Satisfied Customers
Experience: Master Tech at Kennesaw Auto Tech

Gunvir Singh 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
Where is the fuse for the alternator? Had alternator
had alternator rebuilt, but still not charging battery, so we figure its a fuse?… read more
AMEDEE
AMEDEE
AUTOMOTIVE TECHNICIAN
Vocational, Technical or Trade Scho
9,105 satisfied customers
Trying to locate cylinder head temp sensor. Temp guage
Trying to locate cylinder head temp sensor. Temp guage doesn't register and have high idle when restarting warm truck/ hard to start when warm. All symptoms appeared simultaneously. … read more
Jaybird61
Jaybird61
Master Automotive Mechanic
2,285 satisfied customers
How are you? Great My 2004 Ford F150 is running bad, F150
It is pulling the following codes: P0340 / P0021 / P0011 / P0345 / P0174 … read more
David Craig
David Craig
OWNER/MECHANIC
Associates
5,851 satisfied customers
2004 F150 Lariat- Temp gauge says temp is fine yet digital
2004 F150 Lariat- Temp gauge says temp is fine yet digital read out says between 88 and 95 going down the road, average driving.… read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
f150: I have a f150 5.4 2004 I replaced timing tensioners and
I have a f150 5.4 2004 I replaced timing tensioners and put it back together ran rough took it back apart to make sure timing was right put it back together still barely runs and keeps hydro locking o… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
ford: my a.c. compresser clutch locked up. got a a.c. bypass
my a.c. compresser clutch locked up. got a a.c. bypass short belt but can't get tensioner to work by following belt diagram on radiator cowling. what could i be doing wrong.… read more
Eric
Eric
Retired
N/A
14,436 satisfied customers
Ford F150 XLT: The timing chain on my 2004 ford f150 5.4 v8
The timing chain on my 2004 ford f150 5.4 v8 triton broke, i got the kit and replaced all the necessary parts but the truck still stalls, doesnt get enough power to climb up hill and takes a while to … read more
APenland
APenland
Ford Senior Master Technician
Associate in Industrial Management
3,186 satisfied customers
4 F150: max rpm..awhile..trouble codes..I changed the fuel filter.
2003/4 F150/4.6 triton/ Daughter brought by stating the max rpm's were 2500 + vehicle always starts great and idles fine with no misses,and that it took her awhile to get up to speed(No engine trouble… read more
Brian
Brian
Ford Senior Master Certified Shop Forema
Vocational, Technical or Trade Scho
1,228 satisfied customers
1990 Ford F-150 Lariat: V8..Automatic Transmission..Stalls..gas pedal
Ok so I have a 1990 Ford F-150 Lariat XLT 5.0L V8 302 with Automatic Transmission. Stalls when I put truck into reverse and after driving for awhile will stall in drive when coming to a stop light or … read more
Randall
Randall
Auto Technician / Consultant
Vocational, Technical or Trade Scho
69 satisfied customers
F150: triton v8 5.4L between 2004-2008..spark plug problem
I am thinking about buying F150 Triton V8 5.4L between 2004-2008. I have started hearing about a spark plug problem that might cost thousands of dollars to fix. I don't want to buy someone else's prob… read more
Bamaman39
Bamaman39
Ford master diesel Tech.Ford certified
High School or GED
2,154 satisfied customers
2008 Ford f150: triton..l..v8..a delay in acceleration when I
I just bought a 2008 Ford f150 triton 5.4 l v8 that seems to have a delay in acceleration when I try to hit into passing gear. Is this normal?… read more
CTFordTech
CTFordTech
Auto Technician
Vocational, Technical or Trade Scho
4,460 satisfied customers
2004 F150 Lariat: 5.4l..awhile..the cam phaser is indeed bad..forums
I have a 2004 F150 Lariat w/5.4l and have had this "knocking" noise for awhile that everyone seems to relate to the cam phaser problem. My question is what is the potential harm to the engine if the c… read more
Ron
Ron
ASE Certified Technician
Vocational, Technical or Trade Scho
25,182 satisfied customers
Ford: lmtd New car with 1200 mi (2010) awd..gas,the car stalls
Ford Edge lmtd New car with 1200 mi (2010) awd. So if I'm stopped at a red light or once I was stopped at a train crossing,when applying the gas,the car stalls and then lurches foward,stalls again the… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 satisfied customers
F150 Lariat: / the 5.4L 4x4..recall bulletins..faulty..cruise switches
I have a F150 Lariat W/ the 5.4L 4x4, My question is what could be the problem with my cruise control? I get the recall bulletins and it says that the shift interlock switch might be faulty. The Ford … read more
b-kitchener
b-kitchener
Ford dealer senior master technician
Vocational, Technical or Trade Scho
206 satisfied customers
Battery light..abs light..the gauges go up and they come back down
The first thing that happened was the battery light turned on then the radio turned off and then the abs light turned on. When I got home I turned off the truck and tried to turn it back on and it wou… read more
Ray M90Ranger
Ray M90Ranger
Vocational, Technical or Trade Scho
140 satisfied customers
1997 Ford F150 Lariat: recall..the cruise control fixed so I..gauges
I have a 1997 Ford F150 Lariat that i bought used. I got a recall notice to have the cruise control fixed so I brought my truck the local dealership. When I picked up my truck, the gauges didn't work.… read more
Mark W
Mark W
Associate Degree
92 satisfied customers
2002 Ford: Lariat..Road - V-8 triton..Service Engine Soon light came
We have a 2002 Ford Lariat 4X/Off Road - V-8 Triton - 33K miles. We purchased the truck from an independent dealer, and almost as soon as we left the lot, the "Service Engine Soon" light came on. We h… read more
Wrenchtech
Wrenchtech
Vocational, Technical or Trade Scho
616 satisfied customers
2004 f150 Lariat: triton..purchased used..digit code..keyless entry
I have a 2004 f150 Lariat 5.4 Triton, purchased used. I am trying to find the 5-digit code to program the keyless entry system. I do not have the owner card. Where is this number on the computer modul… read more
Chris (aka- Moose)
Chris (aka- Moose)
Technician
Vocational, Technical or Trade School
29,223 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