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: Car
Satisfied Customers: 23888
Experience:  Automotive Repair Shop Manager, Technician/JA Mentor
Type Your Car Question Here...
Eric is online now
A new question is answered every 9 seconds

Dodge intrepid: a vacuum leak under the plenum..fluctuates..rpms

Resolved Question:

2001 2.7 dodge intrepid seems to have a vacuum leak under the plenum. the idle fluctuates from 1000 to 1400 rpms. how do I remove the plenum and what do I look for to repair ?
Submitted: 5 years ago.
Category: Car
Expert:  Eric replied 5 years ago.

Hi,

 

Most likely problem is a leaking gasket between upper and lower intakes.

 

Here are directions for removing the upper intake:

 

Removal:

  • Before servicing the vehicle, refer to the Precautions section.
  • Disconnect the negative battery cable.
  • Properly relieve the fuel system pressure.
  • Drain the cooling system.
  • Disconnect the air tube from the air cleaner and the throttle body.
  • Hold the throttle lever in the wide-open position and remove the throttle cable and the speed control cable from the lever. Compress the locking tabs on the cables and remove them from the mounting brackets.
  • Unplug the electrical connections from the following: NOTE Cover the lower part of the intake manifold to prevent foreign material from entering the engine.
    • Solenoid on the Exhaust Gas Recirculation (EGR) valve transducer
    • Manifold Absolute Pressure (MAP) sensor
    • Throttle Position (TP) sensor
    • Idle Air Control (IAC) motor
    • Vacuum hose from the Positive Crankcase Ventilation (PCV) valve as well as the power brake booster at the intake manifold nipple
    • Vacuum line at the fuel pressure regulator
    • Purge hose from the throttle body
    • Electrical connector from the TP sensor and the IAC motor
    • EGR tube-to-intake manifold plenum screws
    • Intake manifold plenum (upper part of the manifold)
  •  

    Installation:

    • Intake plenum with new gasket onto the intake manifold. Loosely install the mounting bolts.
    • EGR tube to the manifold with a new gasket in place. Loosely install the mounting screws.
    • Torque the intake manifold plenum mounting bolts to 105 inch lbs. (12 Nm) following the outlined sequence
    • Left and right support brackets to the manifold and torque the lower fasteners to 50 inch lbs. (6 Nm) and the upper fasteners to 105 inch lbs. (12 Nm)
    • EGR tube mounting bolts
    • PCV valve hose and power brake booster hose
    • Electrical connectors to the EGR transducer solenoid, IAC motor, MAP and TP sensors
    • Throttle cable and speed control cable to the mounting bracket and connect to the throttle body lever while holding lever in the wide-open position
    • Purge hose to the throttle body
    • Reconnect the air tube to the air cleaner and the throttle body
    • Negative battery cable
  • Change the engine oil and oil filter.
  • Fill the cooling system. Run the vehicle with the radiator cap removed until the thermostat opens, adding coolant as required. Watch for fuel and coolant leaks and for correct engine operation.
  • Once the vehicle has cooled, recheck the coolant level and add, if necessary.
  • graphic

     

     

    Vacuum diagram to make sure your lines are run correctly:

    graphic

    Eric, Automotive Repair Shop Manager
    Category: Car
    Satisfied Customers: 23888
    Experience: Automotive Repair Shop Manager, Technician/JA Mentor
    Eric and 11 other Car Specialists are ready to help you
    Customer: replied 5 years ago.
    How long is the flat rate time for this repair and how much should it cost to fix ?
    Thanks
    Expert:  Eric replied 5 years ago.

    Hi,

     

    Sorry, my labor guide software crashed. I believe its around 3-3.5 hours to replace the upper intake plenum. You would be looking at between $280-350 parts and labor depending upon your local hourly labor rates.

    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:

     
     
     
    • 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
    < Last | Next >
    • 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
    • Lurch. Thank you very much. I had real doubts about this website but your promptness of response, quick followup and to the point answer with picture was incredible. Charles Walnut Creek, CA
    • As a single woman, I really appreciate an excellent and affordable opinion.
      Thank you Geordie, I will not hesitate to contact justanswer in the future!
      Sue Charleston, WV
    • Another great insight to what may be the problem. I will have my mechanic take a look at it tomorrow. Thanks again, Frank...you do indeed know your stuff. Jim Castleberry, FL
    • The nearest Volvo dealer is 160 miles away. Best $15 bucks I have spent in a long time! Paul M Corpus Christi, TX
     
     
     

    Meet The Experts:

     
     
     
    • Chris (aka-Moose)

      Technician

      Satisfied Customers:

      846
      16 years of experience
    < Last | Next >
    • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka-Moose)'s Avatar

      Chris (aka-Moose)

      Technician

      Satisfied Customers:

      846
      16 years of experience
    • http://ww2.justanswer.com/uploads/TE/TedG/2012-6-15_14759_avaLarge.64x64.jpg Ted G.'s Avatar

      Ted G.

      ASE Certified Technician

      Satisfied Customers:

      1596
      20 years auto repair experience, ASE Master Tech, Mechanical Failure consultant, Expert Witness
    • http://ww2.justanswer.com/uploads/joecamel90/2008-11-13_03615_head_shot.jpg George H.'s Avatar

      George H.

      ASE Certified Technician

      Satisfied Customers:

      1311
      ASE Master Tech 15+ yrs, AAS Automotive Technology, Factory trained Asian specialist
    • http://ww2.justanswer.com/uploads/AM/amedee/2013-10-24_23656_Amedee1.64x64.jpg Amedee's Avatar

      Amedee

      ASE Master Tech

      Satisfied Customers:

      2367
      ASE Master Tech advanced level specialist
    • http://ww2.justanswer.com/uploads/SU/supermechanic/2013-8-23_03546_500.64x64.jpg Jerry's Avatar

      Jerry

      Master Mechanic

      Satisfied Customers:

      1906
      ASE master, 30+ years. All makes and models. Trouble shooter, shop forman, service manager
    • http://ww2.justanswer.com/uploads/CR/crzydrvr00/2013-11-3_12123_246347.64x64.jpg Richard's Avatar

      Richard

      ASE Certified Technician

      Satisfied Customers:

      942
      12 years Ford Lincoln/Mercury Jaguar dealership as a technician and shop foreman reparing all makes
    • http://ww2.justanswer.com/uploads/ST/Steve7654/2012-6-5_215929_japic800x660.64x64.jpg Steve's Avatar

      Steve

      Auto Service Technician

      Satisfied Customers:

      1980
      25+ yrs experience as a professional working technician; ASE L1 master technician