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 Amedee Your Own Question
Amedee, Mercury Technician
Category: Mercury
Satisfied Customers: 23943
Experience:  ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
Type Your Mercury Question Here...
Amedee is online now
A new question is answered every 9 seconds

2000 mercury cougar: v6 engine..oxygen sensor..o2 sensor..cleaner

Resolved Question:

I have a 2000 mercury cougar v6 engine was just replaced, but it failed the emission test, the print out paper says oxygen sensor and catalytic, if i replace the o2 sensor would that possible correct the catalytic converter, the car had 100,000+ miles before i replaced the engine, could i also use some catalytic converter cleaner to pass the emissions test
Submitted: 6 years ago.
Category: Mercury
Expert:  Amedee replied 6 years ago.

Do you happen to have the code number in that computer?
Customer: replied 6 years ago.
Hi, sorry it took so long for me to reply, the only code listed on the emissions print out is P1518, but it says oxygen sensor not ready, The day it failed emissions I tookkthe car back to the mechanic that replaced the engine and he said the code was far air control flap or something so he fixed the flap, it was not closing properly, he said it is closing correctly and opening correctly. but when the mechanic scaaned itthe oxygen sensor message came up again on his scanner print out as well, the print out also says some other sensors are not ready. I took it to Meineke and the guy there told me it needed a new engine intake manifold, I did not tell him I had just got the engine replaced in the car, he told me it would cost 1200 dollars to fix, I said opkay and got in my car and left. becuase that cant be true if I just got an engine put in it, so I wnet back to the mechanic who replaced the engine for me and he told me that was not what it needed, he said it has to do with the sensors or the catyliic converter, so now I dont know what it needs and i am tired af paying all these places the 70 dollars to check it out and they tell me all different things, could it possible be the O2 sensors and if so how many are on the cougar, or maybe a tune up will do it, please help me. I have spent over $2000.00 this far
Expert:  Amedee replied 6 years ago.



Sorry for the delay!


P1518 Intake Manifold Runner Control Stuck Open


Possible Causes


IMRC connector is damaged
IMRC Monitor signal circuit shorted to ground
IMRC actuator has failed
PCM has failed

We are going to have to run some checks in order to figure out what is going on. Check the voltage to the Intake Manifold Runner Control actuator on top of the front valve cover. Battery voltage should be on the Green/White wire at the actuator. With the actuator unplugged and the key on, check for 5 volts on the Black/Blue wire in the connector. If that checks out ok, then back probe the Black/Red wire with a jumper wire, and install a voltmeter on the Black/Blue wire, with the voltmeter ground lead to any good ground. Then, with the key on and the actuator connected, ground and unground the Black/Red wire using the jumper wire. Look for the actuator cable to pull in and open the levers on the intake manifold when the Black/Red wire is grounded, and for the cable and levers to release when the Black/Red wire is ungrounded. Verify that the levers in the intake manifold move freely. Also, monitor the voltage on the Black/Blue wire as the actuator cable pulls in and releases. When the actuator is released, the voltage should be 5 volts, and when it pulls in, the voltage should drop to slightly less than 1 volt.

Amedee, Mercury Technician
Category: Mercury
Satisfied Customers: 23943
Experience: ASE certified Technician advanced level specialist. Wisconsin certified emissions state inspector
Amedee and 8 other Mercury Specialists are ready to help you
Customer: replied 6 years ago.
so do I need a new manifold, becuse the guy told me after it failed and i took it back to the mechanic who installed the engine, the the air control flap or something was not closing properly and he fixed that, then he rescanned it in his shop and came up with out that code but with just the 02 sensor and catlytic no codes were given just the words and beside it it says not ready
Expert:  Amedee replied 6 years ago.



Since I ma not there ot test if for you, I don't know what the results are or what they are going to be when the test that I gave you is run. It is possible for the intake to intake manifold runner to be bad. However, the Intake Manifold Runner Control (IMRC) Actuator goes bad a lot as well. Just be sure to check everything before replacing the intake manifold.


I DO hope you found my Answer to be helpful regarding your vehicles condition. IF SO-please hit **ACCEPT** as you read this Answer, in order that I may receive credit for my time, thanks. BONUSES & Positive Feedback Most appreciated!

Please Note: I receive ZERO Credit until & unless you choose to ACCEPT my well thought-out Answer.






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... seen a spike since October in legal questions from readers about layoffs, unemployment and severance.
Web sites like
...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
< Previous | 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 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:

  • Chris (aka- Moose)

    Chris (aka- Moose)

    Mercury Technician

    Satisfied Customers:

    16 years experience with Mercury
< Last | Next >
  • Chris (aka- Moose)'s Avatar

    Chris (aka- Moose)

    Mercury Technician

    Satisfied Customers:

    16 years experience with Mercury
  • John Mc's Avatar

    John Mc

    Mercury Technician

    Satisfied Customers:

    19 years Ford Lincoln Mercury experience
  • Tim's Auto Repair's Avatar

    Tim's Auto Repair


    Satisfied Customers:

    Have owned a repair shop for 25 yrs.
  • Chuck's Avatar


    ASE Certified Technician

    Satisfied Customers:

    33 Years experience,Ford Senior Master,ASE Master,L1 Advanced Engine Performance
  • scottz136's Avatar


    Mercury Technician

    Satisfied Customers:

    senior master lincoln mercury tech.
  • Ron Z.'s Avatar

    Ron Z.

    - Mercury Tech -

    Satisfied Customers:

    18+yrs experience. State Inspector and Mercury Diagnostics
  • Tim Mohr's Avatar

    Tim Mohr


    Satisfied Customers: