A new question is answered every 9 seconds

1997 ford F150: v6..misses , shakes..runs fine..new plugs..coil pack (

Customer Question

I have a 1997 ford F150 4.2 v6 my problem is I drive couple hours truck runs excellent get home and truck sits couple days When I go to start it it starts and quits Itry again have to hold my foot to floor takes about a minute to start , When it starts misses , shakes, and poping in cadilatic convertor after couple minutes runs fine Have had fuel system pressure tested, new plugs, wires, coil pack (does it more often when damp out If I drive somewhere and it sits all day starts right up when time to leave
Submitted: 6 years ago.
Category: Ford
Expert:  Nathan Hosier replied 6 years ago.
Hi it sounds like your idle air control valve is sticking this is a silver colored valve on top of the intake near where the air cleaner hose attatches to throttle body it wil have a two wire connector if it is sticking when you try to start the eng it will allow to much air into eng and cause eng to die can not explain the popping in the catalyic converter but the idle air control valve could cause the eng to miss after eng warms up then usually the eng will run perfect and no more problems tell you let set again hope this helps thanks
Customer: replied 6 years ago.
put new one on allready
Expert:  Nathan Hosier replied 6 years ago.

Ok I wil opt out and see if any one else has any good idea sorry I was no more help

Customer: replied 6 years ago.

seems to be flooded if fuel regulator was sticking sometimes when I shut it off would this flood it It only pops on drivers side



Expert:  Nathan Hosier replied 6 years ago.

If the fuel pressure regulator was sticking you would have saw high fuel pressure when you checked pull the spark plugs out on the side where you think the popping nosie is coming from and check electrodes look for one that is wet maybe you have a fuel injector that is not spraying fuel it is dribbling or leaking bad if you find one then leave that fuel injector unplugged and see if it starts better that would be the only other thing I can think of

Customer: replied 6 years ago.
If fuel injector was dribbling would it not miss when driving or idling. does none of those After it starts runs excellent even good on gas
Expert:  A. Penland replied 6 years ago.


Try this simple test in the morning. Turn the ignition key to on, not start, hold it there for 2 seconds, then turn it to off. Do this about 3 times and see how the truck starts. If it starts right up with no problems, you problem is a check valve in the fuel pump assembly that is not replaceable without replacing the fuel pump assembly. The check valve keeps fuel in the fuel lines for startup. When the check valve fails, fuel drains back to the fuel tank and the pump has to resupply the fuel lines with fuel causing your problem.

Ask A. Penland Your Own Question
A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Ford
Satisfied Customers: 6144
Experience:  ASE Master Certified, ASE Advanced Gasoline Engine Performance
Type Your Ford Question Here...
A. Penland is online now
How JustAnswer Works:
  • Ask an Expert
    Experts are full of valuable knowledge and are ready to help with any question. Credentials confirmed by a Fortune 500 verification firm.
  • Get a Professional Answer
    Via email, text message, or notification as you wait on our site.
    Ask follow up questions if you need to.
  • 100% Satisfaction Guarantee
    Rate the answer you receive.

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 D USA
< Previous | Next >
  • 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 D USA
  • 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. Molly USA
  • 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. BR New 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 P Elm 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. Phil Marysville, CA

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.

Meet The Experts:

  • Ron


    ASE Certified Technician

    Satisfied Customers:

    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
< Last | Next >
  • http://ww2.justanswer.com/uploads/FO/fordguyu/2015-7-7_172556_onnieew.64x64.jpg Ron's Avatar


    ASE Certified Technician

    Satisfied Customers:

    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)


    Satisfied Customers:

    16 years experience
  • http://ww2.justanswer.com/uploads/JM/jmcdo28/2012-2-23_01655_resized.64x64.jpg John Mc's Avatar

    John Mc

    Ford Technician

    Satisfied Customers:

    19 years Ford Lincoln Mercury experience
  • http://ww2.justanswer.com/uploads/wmarti7/2009-4-18_04332_Avatar.jpg Chuck's Avatar


    ASE Certified Technician

    Satisfied Customers:

    33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
  • http://ww2.justanswer.com/uploads/BL/Bluegorilla/2012-6-21_16298_cam.64x64.JPG Cam's Avatar


    Journeyman Automotive Technician

    Satisfied Customers:

    GM Grand Master Technician 2007. 14 years Automotive experience.
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar


    ASE Certified Technician

    Satisfied Customers:

    12 years at a Ford Lincoln/Mercury and Jaguar dealer as a technician and shop foreman.
  • http://ww2.justanswer.com/uploads/BA/baddad1/2014-4-1_23659_avatar.64x64.jpg Mike V.'s Avatar

    Mike V.

    Auto Service Technician

    Satisfied Customers:

    25 years experience on all makes and models, Licensed NYS Inspector.