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 Jay Your Own Question

Jay
Jay, Chevy Mechanic
Category: Chevy
Satisfied Customers: 594
Experience:  5 yrs experience, GM Trained,
12620940
Type Your Chevy Question Here...
Jay is online now
A new question is answered every 9 seconds

2003 cavalier: a/t 2.2 ecotech random misfire code..idles..surges

Resolved Question:

2003 cavalier a/t 2.2 ecotech random misfire code. idles poorly, surges at idle. runs ok off idle.o2 sensor reads rich at idle.reads normaly off idle injector pulse width is 4.6 to 5.2 at idle.
Submitted: 6 years ago.
Category: Chevy
Expert:  Jay replied 6 years ago.

I believe it is your ignition control module. I've seen many of these causing misfires on the ecotech engines and replacing them makes the misfire go away. Assuming it is the Ignition control module here are the instructions for replacing it.

Ignition Coil Housing Replacement

Removal Procedure

  1. Remove the accelerator and cruise control cables from the bracket, if equipped.
  2. Remove the bracket.
  3. Remove the ignition control module (ICM) . Refer to Ignition Control Module Replacement .
    Object Number: 412144  Size: SH

  4. Remove the ignition coil housing retaining bolts.
  5. Remove the ignition coil housing from the camshaft cover.

Installation Procedure


    Object Number: 412144  Size: SH

  1. Install the ignition coil housing to the camshaft cover. Install the ignition coil housing retaining bolts.
  2. Tighten
    Tighten the retaining bolts to 10 N·m (89 lb in).

  3. Install the ICM. Refer to Ignition Control Module Replacement .
  4. Install the accelerator and cruise control cables bracket.
  5. Install the accelerator and cruise control cables bracket bolts.

    Tighten
    Tighten the retaining bolts to 10 N·m (89 lb in).

  6. Install the accelerator and cruise control cables to the bracket.

Ignition Control Module Replacement

Removal Procedure

  1. Turn OFF the ignition.
  2. Remove the accelerator cable from the bracket.
  3. Remove the accelerator cable bracket bolt.
  4. Remove the accelerator cable bracket.
    Object Number: 783965  Size: SH

  5. Disconnect the ignition control module (ICM) harness connector.
  6. Remove the ICM retaining screws.
  7. Remove the ICM from the ignition coil housing.

Installation Procedure


    Object Number: 783965  Size: SH

    Important: Make sure the interconnect and seal are lined up before module installation.

  1. Install the ignition control module in the ignition coil housing.

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  2. Install the ICM retaining screws.

    Tighten
    Tighten the retaining screws to 1.5 N·m (13 lb in).

  3. Connect the ICM harness connector.
  4. Install the accelerator cable bracket.

    Notice: Use the correct fastener in the correct location. Replacement fasteners must be the correct part number for that application. Fasteners requiring replacement or fasteners requiring the use of thread locking compound or sealant are identified in the service procedure. Do not use paints, lubricants, or corrosion inhibitors on fasteners or fastener joint surfaces unless specified. These coatings affect fastener torque and joint clamping force and may damage the fastener. Use the correct tightening sequence and specifications when installing fasteners in order to avoid damage to parts and systems.

  5. Install the accelerator cable bracket bolt.

    Tighten
    Tighten the retaining screws to 10 N·m (18 lb in).

  6. Install the accelerator cable to the bracket.

Please reply if you have any questions.

Customer: replied 6 years ago.
So I've replaced the ignition module.Still surges,Still idles poorly still has a random misfire code still runs rich at idle any other ideas?I have replaced the spark plugs, coils,map sensor and ignition module.Surges and runs rich at idle,O2 switches normally off idle.At idle o2 sensor sits about .900.At 1500 rpm o2 switches normally.engine load value on the snap on scanner reads 62% at idle
Expert:  Jay replied 6 years ago.

Hello hubala, look really carefully for an intake vacuum leak and also check circuits 423 and 406 IC timing control for poor connection on either end at the pcm or ignition control module. Also check these circuits for a intermittent short to ground, they may short on the AC lines near the AC compressor, on the transmission mount, or on the transmission lines where the lines enter the transmission. Here is a schematic of the circuit just click here. Please reply.

 

 

Customer: replied 6 years ago.
i dont have a viewer for docx files.is it available in a different format?
Expert:  Jay replied 6 years ago.

Here is another schematic unfortunately it will come up very large on your screen but you will be able to navigate to see the circuits I'm talking about.

 

Object Number: 783407  Size: FS

Jay, Chevy Mechanic
Category: Chevy
Satisfied Customers: 594
Experience: 5 yrs experience, GM Trained,
Jay and other Chevy Specialists are ready to help you
Customer: replied 6 years ago.
engine made some noise for the first time coming out of timing chain area.turns out the timing chain had slipped.adjusted cam timing,doesn't surge anymore.
Expert:  Jay replied 6 years ago.
I'm glad you found the problemCustomer Thanks for using J.A.

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 was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
< Last | Next >
  • I was having a terrible problem with the wheel bearings on my 98 Chevy Cavalier and I suspect that using this website saved me plenty of time and money. Todd L Rochester NY
  • Wonderful service, prompt, efficient, and accurate. Couldn't have asked for more. I cannot thank you enough for your help. Mary C. Freshfield, Liverpool, UK
  • This expert is wonderful. They truly know what they are talking about, and they actually care about you. They really helped put my nerves at ease. Thank you so much!!!! Alex Los Angeles, CA
  • Thank you for all your help. It is nice to know that this service is here for people like myself, who need answers fast and are not sure who to consult. GP Hesperia, CA
  • I couldn't be more satisfied! This is the site I will always come to when I need a second opinion. Justin Kernersville, NC
  • Just let me say that this encounter has been entirely professional and most helpful. I liked that I could ask additional questions and get answered in a very short turn around. Esther Woodstock, NY
  • Thank you so much for taking your time and knowledge to support my concerns. Not only did you answer my questions, you even took it a step further with replying with more pertinent information I needed to know. Robin Elkton, Maryland
 
 
 

Meet The Experts:

 
 
 
  • Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
< Last | Next >
  • http://ww2.justanswer.com/uploads/TI/tim37857/2011-10-28_23053_S6301814.64x64.JPG Tim's Auto Repair's Avatar

    Tim's Auto Repair

    mechanic

    Satisfied Customers:

    7641
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DT/dt69nova/2012-6-15_234154_pic1.64x64.jpg Dave Nova's Avatar

    Dave Nova

    Chevrolet Technician

    Satisfied Customers:

    6870
    ASE Master Certification. GM World Class Certification
  • http://ww2.justanswer.com/uploads/ggrote1/2009-06-27_031011_me.jpg Gary's Avatar

    Gary

    Chevy Technician

    Satisfied Customers:

    5404
    15 years GM master tech
  • http://ww2.justanswer.com/uploads/testedtuff/2009-09-26_170108_pictures.jpg John's Avatar

    John

    Master A.S.E Automotive technician

    Satisfied Customers:

    4071
    A.S.E MasterTechnician A1-A8 w/L1,38 years experience General Motors Master Technician
  • http://ww2.justanswer.com/uploads/RO/rodcuda/2011-7-25_224114_Donhoff1.64x64.JPG Neal's Avatar

    Neal

    Chevy Mechanic

    Satisfied Customers:

    2306
    Shop Owner and Mechanic on multiple makes.
  • http://ww2.justanswer.com/uploads/goodwrench9124/2008-11-09_220838_dscf0007.jpg goodwrench9124's Avatar

    goodwrench9124

    ASE Certified Technician

    Satisfied Customers:

    2041
    Ase Master Certified, GM Master Certified Tech. Awarded GM Top performer, Hybrid certified
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Chevy Tech -

    Satisfied Customers:

    1912
    18+yrs experience. State Inspector and Chevy Diagnostics
 
 
 
Chat Now With A Chevy Mechanic
Jay
Jay
Chevy Mechanic
594 Satisfied Customers
5 yrs experience, GM Trained,