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 AMEDEE Your Own Question

AMEDEE
AMEDEE, FORD TECHNICIAN
Category: Ford
Satisfied Customers: 21882
Experience:  ASE MASTER TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
279429
Type Your Ford Question Here...
AMEDEE is online now
A new question is answered every 9 seconds

96 ranger: 000 miles..rev..1 cyl..tps and egr and fuel press is 30 psi

Resolved Question:

i have a 96 ranger 2.3 5 speed with 230,000 miles it idles ok but if i rev it a few time's in neautral its like its running on 1 cyl,then after about 2 minites its back to normal.i have changed wires,coils,fpr.tested tps and egr and fuel press is 30 psi @ idle and about 20psi when i hit the gas?o,and i put a used iac,cant keep wasteing money.any help would be great
Submitted: 2 years ago.
Category: Ford
Expert:  AMEDEE replied 2 years ago.
Hello!

How does the engine run under acceleration in gear?

Is the check engine light on?

Are there any codes in the computer?
Customer: replied 2 years ago.
it seem to run ok when im driving,maybe a slight miss,no check engine light and no codes
Expert:  AMEDEE replied 2 years ago.
So does it bog down or misfire when this happens?
Customer: replied 2 years ago.
it runs so bad when it happens if i hit the gas before it clears up it just dies out
Expert:  AMEDEE replied 2 years ago.
You could have a bad mass air flow sensor. Or the snorkel from the mass air flow sensor to the throttle body could be ripped. Both are very common and can cause you vehicle to loose power along with many other drive ability issues. First look for cracks or rips or anywhere air can enter the engine that is not accounted for by the mass air flow sensor. Next comes the Mass Air Flow (MAF) sensor. This is a very important sensor input to the computer. It uses a hot wire sensing element to measure the amount of air entering the engine. The MAF sensor then outputs an analog voltage signal to the PCM proportional to the intake air mass. The PCM calculates the required fuel injector pulse width in order to provide the desired air/fuel ratio. If the sensor is bad than this air/fuel ratio will be off causing severe performance issues. In extreme cases, I have seen these two problems cause a no start condition. This input can also be used in determining transmission Electronic Pressure Control, shift and torque converter clutch scheduling. The check engine light may even pop on if the sensor is bad, the snorkel is ripped or a tube has fallen off. This will result in a lean condition.
Expert:  AMEDEE replied 2 years ago.
Wait.. did you say fuel pressure goes to 20 psi when you hit the gas pedal?

If this so this is your problem! CHances are you just got a weak fuel pump or a plugged fuel filter!
Customer: replied 2 years ago.
i didnt see any rips or cracks,is their a way i can test the maf before i go spend money on one of those,i just seen your last reply about the fuel pressure,yes it goes to about 20-22 psi when i hit the gas
Expert:  AMEDEE replied 2 years ago.
Yeah.. that is way too low! It should not go below 30 psi with the engine running especially under a load. I would replace your fuel pump and filter and you will be good to go!

I hope this helps! Please don't forget hit the green accept button so that I may get credit for the time that I have spent with you. This is necessary for me to be paid for my work and get credit for assisting you. Your question will not close, and you will still have the opportunity to follow-up if needed. Leaving a bonus and positive feedback is not required, but doing so is certainly appreciated!

I do hope you are as honest with me about your vehicle as I have been with you. If you have any further questions or if you need more assistance, just hit the reply button and we can continue our conversation. Please remember, even if you accept my answer now, you can still repost or respond back to this thread at any time you wish at no further cost and I will be more than happy to continue to work with you until you are happy.

In addition, please allow time between answers as I may be off line spending time with my family or assisting other customers. You can always request me by using the link through my profile page. Just Click on "AMEDEE" next to my picture and I will be sure to respond back in a timely manner.

Thanks in advance!

Best Regards

AMEDEE
AMEDEE, FORD TECHNICIAN
Category: Ford
Satisfied Customers: 21882
Experience: ASE MASTER TECHNICIAN ADVANCED LEVEL SPECIALIST. Wisconsin certified emissions state inspector
AMEDEE and 12 other Ford Specialists are ready to help you
Customer: replied 2 years ago.
i was mistaken,i was useing a fuel gage that has a sending unit and 1 of the wires were loose the psi is ok,i just bought this truck so i dont know if was llike this before,if i let it warm up real good it seems to be ok....im still thinking that used iac valve i put on is bad because when its cold it still does it?????ive checked about everthing else,any thoughts??? thanks
Expert:  AMEDEE replied 2 years ago.
Ok.. if the engine still lacks power on acceleration and the fuel pressure is within specs, then the mass air flow sensor would be suspect. You can check this with a voltmeter or a scanner. However, a scanner is better because you can see the barometric pressure readings calculated by the mass air flow sensor. You cannot see this on a voltmeter.

Another thing would be to check for plugged exhaust or incorrect valve timing.
Customer: replied 2 years ago.
not to be rude but am i getting charged again 4 these answers
Expert:  AMEDEE replied 2 years ago.
NO worries. I would wonder the same thing myself if I were in your shoes. No.. you are not getting charged any more..
Customer: replied 2 years ago.
thankyou,it doesnt lack power,if its cold and i rev it up it a few times it runs like s--t 4 a minute then clears up..if i let it warm up it dosnt seem to do it.i check the maf sensor but all i have iis a dvom and it seem to be ok?
Expert:  AMEDEE replied 2 years ago.
If this problem happens only when you rev it up, then it will not have anything to do with the iac motor or anything with the throttle body or anything else that has to do with the idle.

This usually is a lack of fuel. Especially when the engine is cold.. the engine needs a lot of fuel. IF the primary and secondary ignition checks out ok, I would strongly recommend to verify that fuel pressure is within specs and if the problem remains, replace the mass air flow sensor.
Customer: replied 2 years ago.

ok thanks

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.