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 davehop Your Own Question

davehop
davehop, Ford Technician
Category: Ford
Satisfied Customers: 1290
Experience:  Fully certified in all phases of automotive repair as recognized and certified by Ford Motor Company
14289869
Type Your Ford Question Here...
davehop is online now
A new question is answered every 9 seconds

1991 ford Explorer: ve changed..ignition control module..test light

Customer Question

I have a 1991 ford Explorer it spins but will not start, I've changed the ignition control module, fule pump, fule filter, the only thing I did not change is the fule pump shut-off switch I've used a test light to see if there was power no power can you help?
Submitted: 2 years ago.
Category: Ford
Expert:  davehop replied 2 years ago.

davehop :

Hello and welcome to JA, we need to see if you are getting a spark signal to the coil....there are 4 wires in the coil connector, one is red/green, turn on the key and using your test light see if this wire has power, then let me know and we will go to the next step.

Customer:

ok i'll be right back

Customer:

yes, it has power

Customer:

It's not getting gas at all

davehop :

ok, now hook the test light to the Positive battery terminal, and to one of the other wires ion the coil connector, and c rank over the engine, does the test light blink?

Customer:

ok...brb

Customer:

it did not come on at all

davehop :

ok, check one more thing, go inside the car, crank over the engine, tell me if the check engine light stays on when you crank it over or if it goes out.

Customer:

it goes off

davehop :

ok, replace the PCM, you are receiving a signal from the crank sensor, but the PCM is not sending the signal out to the coil.

Customer:

What is a PCM?

davehop :

The PCM is the powertrain control module, the computer for the engine.

Customer:

Would that solve the problem with me not getting gas?

davehop :

the crank sensor sends a signal to the PCM and the ICM..ignition control module, then the PCM sends the spark signal to the coil...you are getting a crank signal, we proved that because the check engine light goes out while cranking. however, there was no blinking at the coil when we checked for the spark signal, so the PCM is at fault.

davehop :

Yes.

Customer:

Thank you for the info. Will purchase the part and get back with you to let you know if that is what the problem was. Thanks again.

davehop :

wait, before you replace it, the PCM is mounted right above the coil, in the firewall, a big 60 oin connector, loosen the 10mm bolt and unplug the connector, see if there is any moisture in the connector, blow it out with compressed air, and then plug it back in and retry to start it, if it still don't start, replace the PCM.

davehop :

Please hit the green accept button if my answer was helpful.

davehop, Ford Technician
Category: Ford
Satisfied Customers: 1290
Experience: Fully certified in all phases of automotive repair as recognized and certified by Ford Motor Company
davehop and 9 other Ford Specialists are ready to help you
Customer: replied 2 years ago.
I changed the PCM and the engine just spins

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.
 
 
 

Related Ford Questions

Chat Now With A Ford Mechanic
davehop
davehop
Diagnostic Technician
1026 Satisfied Customers
Fully certified in all phases of automotive repair as recognized and certified by Ford Motor Company