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 Eric Your Own Question

Eric
Eric, Automotive Repair Shop Manager
Category: Ford
Satisfied Customers: 24269
Experience:  Automotive Repair Shop Manager, Technician
3195632
Type Your Ford Question Here...
Eric is online now
A new question is answered every 9 seconds

Ford Windstar: I checked the voltage to the solenoid..valves..vacuum

Resolved Question:

On my Ford Windstar, 3.8, 1997, I have a engine check light on with code readings of 1537 and 1538, which are IMRC problems. I checked the voltage to the solenoid and that is ok. I opened up the butterfly valves and put my finger on the vacuum at the vacuum motor and it stayed open which indicates that the motor's diaphragm is ok. I put my mouth up to the air motor vacuum tube and blew into it. It seemed to allow air through. I am not sure if that means anything. So I think it is either the solenoid or the vacuum tubing. The vacuum tubing (tan) goes from the air motor and goes behind the engine and I don't know where it comes out on the other side (right side, facing the engine). Where is the main vacuum intake? I need to know so I can check the tan vacuum tubing. On the right or left of the engine? I saw a rectangular box near the wheel well on the left side with some vacuum tubes going in. Is that the vacuum reservoir? The tan vacuum tube doesn't go in there. How else can I tell what the problem is?
Submitted: 2 years ago.
Category: Ford
Expert:  Eric replied 2 years ago.
Hi,

here is testing procedure:

1. Check the operation of the Intake Manifold Runner Control (IMRC) vacuum actuators located on the passenger side of the intake manifold. The actuators are relaxed and allow the butterflies to be open without the engine running. When starting the engine, a vacuum signal is supplied to both actuators causing them to be closed.

2. If there is vacuum to the actuators, but they do not close, the actuators can be checked with a hand-held vacuum pump to verify that they close and hold vacuum.

3. If there is no vacuum signal to the actuators, check the Brown (BR) wire of the IMRC solenoid located at the rear of the engine Key On, Engine Off (KOEO) and when starting the engine. The Powertrain Control Module (PCM) should ground activate the BR wire when starting the engine, which results in a vacuum signal being delivered to the IMRC actuators.

4. If there is no ground activation on the BR wire, check the circuit to verify it is not open between the solenoid and Powertrain Control Module (PCM) pin 42.

5. If there is a ground activation signal on the BR wire, and battery voltage to the Red (RD) wire at the IMRC solenoid, check the manifold vacuum supply feeding the solenoid and check the vacuum line from the solenoid to the actuators to verify it is not broken or restricted.

6. If the vacuum signal to the solenoid and the line checks OK, replace the solenoid.


vacuum diagram:
graphic
Expert:  Eric replied 2 years ago.
here is testing procedure:

1. Check the operation of the Intake Manifold Runner Control (IMRC) vacuum actuators located on the passenger side of the intake manifold. The actuators are relaxed and allow the butterflies to be open without the engine running. When starting the engine, a vacuum signal is supplied to both actuators causing them to be closed.

2. If there is vacuum to the actuators, but they do not close, the actuators can be checked with a hand-held vacuum pump to verify that they close and hold vacuum.

3. If there is no vacuum signal to the actuators, check the Brown (BR) wire of the IMRC solenoid located at the rear of the engine Key On, Engine Off (KOEO) and when starting the engine. The Powertrain Control Module (PCM) should ground activate the BR wire when starting the engine, which results in a vacuum signal being delivered to the IMRC actuators.

4. If there is no ground activation on the BR wire, check the circuit to verify it is not open between the solenoid and Powertrain Control Module (PCM) pin 42.

5. If there is a ground activation signal on the BR wire, and battery voltage to the Red (RD) wire at the IMRC solenoid, check the manifold vacuum supply feeding the solenoid and check the vacuum line from the solenoid to the actuators to verify it is not broken or restricted.

6. If the vacuum signal to the solenoid and the line checks OK, replace the solenoid.


vacuum diagram:
graphic
Customer: replied 2 years ago.
Thanks, XXXXX XXXXX try that tomorrow and get back to you if I have any more questions.
Expert:  Eric replied 2 years ago.
Hi,

sounds good. I will be here all day tomorrow
Customer: replied 2 years ago.
The rear unit won't hold a vacuum. Is it hard to replace? So the diaphragm is probably bad. Can the diaphragm be fixed or do I have to buy a whole new unit with solenoid and valve activator? The vacuum tube is good. It had a 13 inches of mercury. So does that mean if one diphragm is bad, both go bad? Is there anythng else connected to the vacuum line besides the IMRC?
Expert:  Eric replied 2 years ago.
Hi,

you just have to replace the rear unit. they dont sell a repair kit for the IMRC, so you have to buy a new unit. no need to replace the front one if tested good. It does take a couple of hours to replace as the upper intake manifold has to be removed in order to replace it
Customer: replied 2 years ago.
Is the upper intake manifold the black pipe-looking things on the top? Why does that have to come off. It looks like just a couple of bolts that attach the air-solenoid motor to the side of the engine?
Expert:  Eric replied 2 years ago.
Hi,

how they are situated, they wont come out after removing the bolts unless you have the upper intake off, or at least lifted up.

graphic
Customer: replied 2 years ago.
Do I need to buy a new gasket (s) and new bolts for the upper intake manifold? My Chilton manual doesn't say anything about that except to add RTV sealant but I don't know if that is just on the lower or on the upper too.
Expert:  Eric replied 2 years ago.
Hi,

you can reuse the bolts, but install a new gasket between the upper and lower manifold. If you dont, you wind up with a lean code due to air being sucked in around old gasket
Customer: replied 2 years ago.
Any last tips on problems I might encounter? Do I need a special tool to take off the rings on the linkages?
Expert:  Eric replied 2 years ago.
Hi,

no special tools needed. you can get the rings off with a pick tool.

the procedure is straight forward.

upper intake:
graphic

graphic

graphic



IMRC:

graphic
Expert:  Eric replied 2 years ago.
no special tools needed. you can get the rings off with a pick tool.

the procedure is straight forward.

upper intake:
graphic
View Full Image


graphic
View Full Image


graphic
View Full Image




IMRC:

graphic
Customer: replied 2 years ago.
Thanks, XXXXX XXXXX question. Some on the internet say that you can wire the IMRC closed to turn off the Check Engine light. Is that an option?
Expert:  Eric replied 2 years ago.
Hi,

I have heard of people doing that, but havent tried it as it isnt a true repair and I would never try some band aid repair on a paying customer's car.

I cant recommend trying something based upon car forums that members are not licensed, certifed mechanics.

It is up to you as to whether to try that, but remember that it is at most a band aid repair, and not one any mechanic would try
Eric, Automotive Repair Shop Manager
Category: Ford
Satisfied Customers: 24269
Experience: Automotive Repair Shop Manager, Technician
Eric and 9 other Ford Specialists are ready to help you
Customer: replied 2 years ago.
Yes, I know that you must say that as a certified mechanic. 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.