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 A. Penland Your Own Question

A. Penland
A. Penland, Ford Senior Master Technician, ASE
Category: Mercury
Satisfied Customers: 4787
Experience:  ASE Master Certified. ASE Gasoline Engine Performance Certified,Ford Senior Master Technician
14865528
Type Your Mercury Question Here...
A. Penland is online now
A new question is answered every 9 seconds

Mercury Grand Marquis: where is the ignition module located

Resolved Question:

where is the ignition module located on my 2002 mercury grand marquis
Submitted: 1 year ago.
Category: Mercury
Expert:  A. Penland replied 1 year ago.

Hello and thanks for using Just Answer.I will try my best to help you with your question.

Your 2002 Grand Marquis does not have an ICM (Ignition Control Module) The PCM (Engine Computer) controls all the engine sensors and components. The best thing to do first is to check for any DTCs or codes in the PCM (Engine Computer). Do this first before replacing any parts. ANy auto parts store can do this for you for free.

Get the codes and post them on this page.

Customer: replied 1 year ago.
there are no codes,no check engine lights ive tried that. when it stalls, i give it a jump and it starts right away. seems like when i drive for about 3 miles it does that. can it be the ecm? and why i when to the parts store and asked for such it gave me the part, and i check online for that part its exactly like what i have with the discription of such. the part number from autozone if im not mistaking is P143...
Expert:  A. Penland replied 1 year ago.
Can you post a picture of it. I cannot locate part number P143...
Customer: replied 1 year ago.
i googled im http://www.bing.com/images/search?q=images+of+ignition+module+for+2002+mercury+grand+marquis&qpvt=images+of+ignition+module+for+2002+mercury+grand+marquis&FORM=IGRE#view=detail&id=55C4629CDFEE125D164FB4BF88B352EA8503D53E&selectedIndex=36
Expert:  A. Penland replied 1 year ago.

Your 2002 Grand Marquis does not have that module. Ford phased that module out in 1999.

Your PCM controls the ignition coils. Your engine has eight of them. In 1999, there was two coil packs and Ford still used spark plug wires. Ford no longer uses them with the new coil on plug ignition system.

When the vehicle stalls, we need to see if you are loosing spark or fuel to the engine. ALso see if the check engine light is on when the engine stalls and is the check engine light goes out when you try to start it.

Customer: replied 1 year ago.
the engine light does come on as the battery light and so on, but doesnt stay on, how would i check for wether im loosing spark or wether the fuel pum is bad/fuel pressure. also i do get water leaks when it rains in the passenger side under the dashboard, and how would you explain me jumping the car and it starts right away. im sorry for being alil pain, but this issue is driving me nuts
Expert:  A. Penland replied 1 year ago.

Can you better describe "Jumping The Car".

Are you jump starting the vehicle with jumper cables from another vehicle?

Customer: replied 1 year ago.
yes
Expert:  A. Penland replied 1 year ago.

Ok, that is different. Start the vehicle and check the voltage at the battery. It should be 14.5 volts.

Do this check and let me know what reading you get.

Customer: replied 1 year ago.
it does and sometimes i notice the battery indicator going down and i check the voltage and it reads 13.5 or lil less, also ive checked the alternator it seems ok
Expert:  A. Penland replied 1 year ago.

The alternator should put out 14.5 volts with the engine running.

Also have the battery properly load tested and also check the battery cables and clamps on the battery post.

Customer: replied 1 year ago.
do you recommend i change the clamps, and can an alternator fail?
Expert:  A. Penland replied 1 year ago.

The alternator can fail while the engine is running. The best way to isolate the problem, is to place a meter on the battery and measure the voltage till the engine stalls. See what the voltage is. If it drops to 12 volts or lower, replace the alternator.

But if the voltage stays above 13.5 volts, we need to look somewhere else.

Do this test and see what the voltage is when the engine stalls.

Customer: replied 1 year ago.
13.5 volts its an estimate,it could be lower and how do i measure the voltage output from the alternator, sorry all i know is to disconnect the cable from the battery. and in your best opinion you think might be the alternator? or fuel pum?
Expert:  A. Penland replied 1 year ago.

I think it could be the alternator, because you state you need to jump start the vehicle.

If you have a digital meter that reads volts, touch the battery post, black on negative and red on positive with the battery connected and see what the voltage is.

graphic

A. Penland, Ford Senior Master Technician, ASE
Category: Mercury
Satisfied Customers: 4787
Experience: ASE Master Certified. ASE Gasoline Engine Performance Certified,Ford Senior Master Technician
A. Penland and 8 other Mercury Specialists are ready to help you

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
  • 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
 
 
 

Meet The Experts:

 
 
 
  • Ron

    ASE Certified Technician

    Satisfied Customers:

    1601
    ASE Certs and Ford 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:

    1601
    ASE Certs and Ford Certs
  • http://ww2.justanswer.com/uploads/MU/muddyford/2012-6-13_1204_1.64x64.png Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)

    Mercury Technician

    Satisfied Customers:

    1399
    16 years experience with Mercury
  • http://ww2.justanswer.com/uploads/JM/jmcdo28/2012-2-23_01655_resized.64x64.jpg John Mc's Avatar

    John Mc

    Mercury Technician

    Satisfied Customers:

    403
    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:

    287
    33 Years experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
  • http://ww2.justanswer.com/uploads/scottz136/2008-12-09_220350_js640_p1010013.jpg scottz136's Avatar

    scottz136

    Mercury Technician

    Satisfied Customers:

    260
    senior master lincoln mercury tech.
  • 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:

    257
    Have owned a repair shop for 25 yrs.
  • http://ww2.justanswer.com/uploads/DR/drivefast1971/2012-1-12_172422_0009051tQKh.64x64.jpg Ron Z.'s Avatar

    Ron Z.

    - Mercury Tech -

    Satisfied Customers:

    197
    18+yrs experience. State Inspector and Mercury Diagnostics