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.

Ask Daniel Your Own Question

Daniel
Daniel, Ford Technician
Category: Ford
Satisfied Customers: 5063
Experience:  Ford Technician
Type Your Ford Question Here...
Daniel is online now
A new question is answered every 9 seconds

84 ford f150, 302 runs good until fast acceleration then spark

Resolved Question:

84 ford f150, 302 runs good until fast acceleration then spark knocks, spits and sputters, and falls on its face. No power. Any ideas?
Submitted: 4 years ago.
Category: Ford
Expert:  Daniel replied 4 years ago.
copy and print his out it may expire. but I think you are haveing issues with the carb. The power valve sounds like its failing. When you request over drive your carb isnt accepting mixture. or producing mixture.(air gas). You could be ready for a rebuild. But you might want to try something. I went to pep boy's and got the smallest cheapest carb they had for my 302 ford 3 on the tree. just a work truck right. when I done that 302 ran like a scalded beast. 18 miles to the gallon. Just some added info. it was an elderbrock.
Daniel, Ford Technician
Category: Ford
Satisfied Customers: 5063
Experience: Ford Technician
Daniel and 13 other Ford Specialists are ready to help you
Expert:  Daniel replied 4 years ago.

sounds like you have done some switching around so this may only be a reference.

 

 

 

 

Notes

Fig. 3 Motorcraft model 2150A 2 barrel feedback carburetor exploded view. 1983 - 86


Motorcraft model 2150A 2 barrel feedback carburetor

Fig. 4 Motorcraft model 2150 2 barrel non-feedback carburetor exploded view. 1984 - 85


Motorcraft model 2150 2 barrel non-feedback carburetor

Fig. 1 Motorcraft model 2150 2 barrel carburetor less altitude compensator, exploded view


The Motorcraft 2150 carburetor has two main bodies, the air horn and the throttle body. The air horn assembly, which serves as a cover for the throttle body, contains the choke plate and vents for the fuel bowl. On 2150 units installed on V-6 engines, the air horn assembly contains a fuel deceleration system which consists of a metered pickup orifice in the fuel bowl and air/fuel mixing orifices and bleeds.
An electric choke system is incorporated which opens choke plate within 1 - 1-1/2 minutes when under hood temperatures are above approximately 55°to 60°. The electric choke system is supplied current to open the choke when under hood temperatures are between 54 and 74°F.
Some 2150 units are equipped with an altitude compensation aneroid to improve high altitude emission control and driveability. Intake air entering the bypass valve is metered into the air flow above the throttle plates, leaning the mixture for high altitude operation. Air flow is controlled by a valve activated by an aneroid attached to the rear of the carburetor main body. Also, these units are equipped with a choke in the bypass air intake, linked to the main choke.
The throttle plate, accelerating pump, power (enrichment) valve and fuel bowl are in the throttle body. The choke housing is attached to the throttle body.
The two bodies each contain a main and booster venturi, main fuel discharge, accelerating pump discharge, idle fuel discharge, and a throttle plate. On some units, an anti-stall dashpot is attached to the carburetor when the vehicle is equipped with an automatic transmission.
Some vehicles use a feedback carburetor. The air horn assembly used on the feedback carburetor has an auxiliary fresh air intake for the duty cycle solenoid/altitude compensator.
The main body used on feedback carburetors has a provision at the back to attach the duty cycle solenoid/altitude compensator as well as an opening that accepts auxiliary fresh air from the horn and channels that link up to the bleed circuits to the booster support assembly. There is also a throttle angle potentiometer mounted on the throttle at the choke side.
The booster support assembly has cast in channels that flow bleed air to the idle and main system vacuum circuit.

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 D USA
< Last | 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
 
 
 

Meet The Experts:

 
 
 
  • Ron

    ASE Certified Technician

    Satisfied Customers:

    20942
    23 years with Ford specializing in drivability and electrical and AC. Ford certs and ASE Certs
< Last | Next >
  • http://ww2.justanswer.com/uploads/FO/fordguy4u/2011-12-17_222940_HPIM1257.64x64.JPG Ron's Avatar

    Ron

    ASE Certified Technician

    Satisfied Customers:

    20942
    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)

    Ford Technician

    Satisfied Customers:

    22382
    16 years experience with Ford.
  • http://ww2.justanswer.com/uploads/JM/jmcdo28/2012-2-23_01655_resized.64x64.jpg John Mc's Avatar

    John Mc

    Ford Technician

    Satisfied Customers:

    5493
    19 years Ford Lincoln Mercury experience
  • http://ww2.justanswer.com/uploads/wmarti7/2009-4-18_04332_Avatar.jpg Chuck's Avatar

    Chuck

    ASE Certified Technician

    Satisfied Customers:

    1684
    33 Years Experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
  • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

    Richard

    ASE Certified Technician

    Satisfied Customers:

    1518
    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:

    789
    25 years experience on all makes and models, Licensed NYS Inspector.
  • http://ww2.justanswer.com/uploads/lostrider/2009-9-26_23144_php4VNWAA_c1PM1.jpg lostrider's Avatar

    lostrider

    Ford Technician

    Satisfied Customers:

    2940
    ASE Master Technician, Ford Senior Master Technician,Diesel certified, ASE Master, 22 yrs FORD exp.