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Mazda CX-7 Smoke

2

Comments

  • slw5slw5 Posts: 19
    First, what is PCM work that improved gas mileage?

    Emergency situations: when my margin of safety has been compromised due to the turbo lag.

    I do have to admit that the turbo lag has improved since they upgraded it but at first it was a scary situation I had never been placed in before. My husband has been in a few, what he calls "near death experiences" driving it and gets absolutely furious. Perhaps his non-enjoyment of the car is intensified because I got rid of a perfectly good paid off vehicle that he loved. I wanted something smaller and the Liquid Platinum CX7 is just the most amazing looking vehicles parked or on the road so I just purchased it without an ounce of research on it whatsoever (which is so unlike me).

    I was told not to drive it because I have been in a lemon law discussion which is still not resolved. Either take the offer Mazda put on the table or go to litigation. I'm hoping to resolve this within the next few days and get the clanging/knocking/smoke issue addressed. Then I'll be more happy with the car I'm sure.
  • The PCM work is a recall on some models. I am not exactly sure what it entailed. Yours might not be included due to the newness. I guess I have never put myuself into a "near death experience" situation. Your husband most likely did not drive the car all the time and would not know that there is a delay and expected when he hit the throttle it would go immediately.It doesn't, but when it does it is a true rush.

    I hope that you are happy with any situation that occurs with Mazda and please keep all of us informed.
  • Does anybody know if there was a determination on this issue? I just bought an '08 CX-7, it has 1,200 miles on it. I love the car, everything is great about it, except I have these issues. My wife was following me home one night and said it puffed out some smoke, and I noticed on the bottom of the mufflers some soot that wiped off really easily. I wondered why the car was smoking, figured maybe the turbo blows out extra exhaust when it engages. It was when I gunned the car that my wife saw the smoke.

    I've also heard a little mechanical noise from the car, sounds like it is under the hood to me. Nothing too alarming, sort of a rattling noise. I have no problems with turbo lag, performance is always great. I've only put 91 octane in it, always from Shell or 76 or Chevron.

    I thought it might have been a problem on the '07s, maybe not. Anybody have any info?
  • PFFlyer@EdmundsPFFlyer@Edmunds Pennsylvania Furnace, PAPosts: 5,808
    It's Tuesday so that means mazda chat time again. Stop in and meet and greet with your fellow Mazda lovers. Or just stop by for a little fun and car problem chat diagnosis. (One of our favorite games..heh)

    The Mazda Club Chat is on tonight. The chat room opens at 8:45PM ET Hope to see YOU there! Check out the schedule

    PFFlyer@Edmunds

    Moderator - Hatchbacks & Hybrid Vehicles

  • slw5slw5 Posts: 19
    Mazda corporate, the dealership service manager, and the service person has been in touch with me making sure that I am aware of my appointment on Thursday and that they'll have a rental car ready for me . . . .Apparently, a Mazda Technician will inspect and fix my car. It continues to rattle/clang and blow black smoke out the back when I least expect it but always under acceleration at various speeds and could be on flat ground or an incline . . . no rhyme or reason and the smoke doesn't always happen or maybe I miss seeing it.

    I'll definitely let you know what the "fix" is. They didn't tell me if they had a fix or were going to try to fix it. Mazda is doing everything they can to make me happy with Mazda at this point. I will definitely let everyone know what they do to repair my car and if it worked. :sick:
  • slw5slw5 Posts: 19
    For those of you out there that responded regarding the awful clanging/rattle noise in the engine that resulted in black smoke that blows out the back on my CX7 . . . . I finally got it fixed by the Mazda Specialist that came to our local dealership.

    Keep in mind I was involved in the PCM recall that had to do with the light on the dash but that never fixed the problem.

    The special Mazda engineer had my car for 2 days. He had trouble duplicating the issue at first but our local dealership serviceman showed him what he did to make it to happen and HOORAY, they both got to experience it more than once. They put 50 miles on the car in their effort to duplicate it and some reprogramming.

    I had to bring all my keys for the repair which I thought was odd but now I understand they go hand in hand with the programming of the PCM. They put all new 2008 parts on it: Replaced the PCM and the Variable Timing Actuator, did reprograming of the PCM, decarb of the intake, and changed my oil.

    Of course, this is only a few days into the repair but it truly drives like brand new and is more responsive with less turbo lag.

    They gave me the Sport version of the CX7 for my rental and I felt so deprived of all my amenities. Can't tell you what a chore it was to use that switchblade key . . . just the mere fact of getting it out of my purse when I am so used to walking up to my car and just getting in was an effort). Gosh, and no back up camera or heated seats. I am so happy to have my very own car back . . . and gosh, it is such a great looking car!!!!!

    Anyway, I am a very happy CX7 owner now!!!!! :)
  • slw5slw5 Posts: 19
    Vince,

    I posted the outcome of my situation with Mazda but not sure if I replied to the thread so I thought I would email you separately since you were the first to contact me and you wanted to know the outcome :) . I am very happy with my outcome with Mazda and my car drives like a totally different car. Amazing!

    I finally got it fixed by the Mazda Specialist that came to our local dealership.

    Keep in mind I was involved in the PCM recall that had to do with the light on the dash but that never fixed the problem.

    The special Mazda engineer had my car for 2 days. He had trouble duplicating the issue at first but our local dealership serviceman showed him what he did to make it to happen and HOORAY, they both got to experience it more than once. They put 50 miles on the car in their effort to duplicate it and some reprogramming.

    I had to bring all my keys for the repair which I thought was odd but now I understand they go hand in hand with the programming of the PCM. They put all new 2008 parts on it: Replaced the PCM and the Variable Timing Actuator, did reprograming of the PCM, decarb of the intake, and changed my oil.

    Of course, this is only a few days into the repair but it truly drives like brand new and is more responsive with less turbo lag.

    They gave me the Sport version of the CX7 for my rental and I felt so deprived of all my amenities. Can't tell you what a chore it was to use that switchblade key . . . just the mere fact of getting it out of my purse when I am so used to walking up to my car and just getting in was an effort). Gosh, and no back up camera or heated seats. I am so happy to have my very own car back . . . and gosh, it is such a great looking car!!!!!

    Anyway, I am a very happy CX7 owner now!!!!! :)
  • dmele426dmele426 Posts: 33
    i have not heard the noise from the engine that most people describe. However, i just started to realize that my tail pipes are black. I cleaned them for the 1st time yesterday and I am keeping tabs on how long before they get black.
    is too much of the black stuff mean that my gas is not being burnt efficiently??
    do i need to mention it to the dealer?
    i have 5k miles on my car, 2nd oil change was done today. any adivse?
  • slw5slw5 Posts: 19
    I never checked my pipes.

    My biggest complaint was the rattle/clanging noise which resulted in black smoke blowing out the pipes and, of course, the turbo lag. My car was purchased June 2006 so it was one of the early ones sold and I complained about it since the first month I owned it. I now have all new 2008 parts and it runs great. New PCM, actuator, and they did a decarb of the intake I think and an oil change. They never told me what was really wrong with it but I assume my gas was not being burnt efficiently either.

    I did notice that the noise/smoke was worst if I used Techron gas during the issue but I've put it in since and the car continues to run amazing. It has a tighter feel if that makes sense and it shifts smoother and I haven't heard the noise once

    It is like driving a completely different car now. I am so happy to get in it every morning and zip around town to work. Not very far but I'm having fun again. :)

    Have they done a PCM reflash? They did that to mine months ago and it didn't help but since yours in newer maybe it would help.

    good luck!
  • zoom_utezoom_ute Posts: 13
    glad they fixed the variable timing actuator, I was going to suggest that (or the wastegate actuator for the turbo). These can be common defects on turbo cars.

    Sooty tailpipes are also common on turbo cars, when under boost they run richer air-fuel mixtures than non-turbo cars....by design, they use excess fuel to cool the combustion process to prevent pinging/detonation.
  • Slw5,

    I'm having the same problem less the black smoke, but then again I never paid attention to the back of my car. It's always upon acceleration and from the same spot. Same deal as yours, bought the car back in '06 so it's one of the first, took it in for the PCM reflash back in 07. Taken it to the dealership before and car is sitting there as we speak. They've tried to re-produce the problem and of course it won't do it when they drive it or when I go on the test drives with them. Anyhow was hoping you could provide some insight on how the tech was able to re-produce the clanking noise or better yet provide the contact for the dealership who dealt with the issue so I can refer my dealership to call them to avoid having to go through the same ordeal you did.

    Thanks!
  • The rattling noise started for me about a month and a half ago. My CX-7 is at the shop this morning to find out why. I couldn't find the "why" it is happening on here from other user posts. I'll post how Mazda fixed it once I get my car back.
  • slw5slw5 Posts: 19
    My dealership could not produce the issue either each time I took it in till the last time when I drove for them and they witnessed it. I had been speaking to someone else on this form who wouldn't get it reproduced/verified either. He contacted the attorney I used and since there is a Service Bulletin now his dealership still wanted to verify it or they wouldn't do the work. My attorney suggested that he go to another Mazda dealership and tell them he wanted a new service dealership and to explain what was happening with the vehicle and that dealership performed the fix for him.

    My suggestion would be for you to drive it for your dealership; however, if your CX7 is like mine I had the worst trouble causing it to shudder but it did it all the time when I least expected it. I was just lucky to go in totally pissed at the end of the day and my technician road with me and it did it again. The corporate technician couldn't make it do it but my tech guy got in the car and did what he saw me do and it did it otherwise I would still be here complaining.

    My car runs great now with no shudder/clanging noise. I have no black smoke now unless I stomp on the gas but there is no noise at all. I am a very happy camper now. Good luck in your effort to get it fixed.

    The Service Bulletin is: ENGINE PINGING AND/OR LACK OF POWER UNDER ACCELERATION #01-041/08.
  • slw5slw5 Posts: 19
    suggest Service bulletin #01-041/08 ENGINE PINGING AND/OR LACK OF POWER UNDER ACCELERATION

    Replacing the PCM and variable Valve Timing Actuator etc. has made my car like a brand new one. Love it now!!
  • wc524wc524 Posts: 2
    Thanks! Shortly after my post back in Sept the technician magically made the noise come up. It's fixed and I do have to agree it's driving like new...there's a noticeable difference in the torque lag (or lack thereof now). Still loving my car as well!
  • zoom49zoom49 Posts: 76
    Hey slw5,

    Good to see you are still around. I am the other owner you were referring to.
    It seems this issue only affects the 2007 model year using California's lower 91 octane fuel. The service bulletin has the dealer replace the Variable Valve Timing actuator and install a new ECU form a 2008 model. In 2008 Mazda changed the ECU to enable the engine to use lower octane fuel. I had always used premium
    but here in Cali it was only 91 octane. Our car no longer has this issue and is running great. The problem is getting the dealer to acknowledge the issue.
  • slw5slw5 Posts: 19
    Good to see you as well!

    I am so thankful they were able to verify my issue and yours. I would have sat there till hell froze over before they actually would have done anything with my name at the top of the list for the specialist. McGee did a great job on my behalf and my car is like a completely different car. I love it now!!!

    Our tech guy at work is a Mazda enthusiast & he drove it probably the way it was meant to be driven using the gears and all and came back smiling!!! Of course, he told me the reason I don't get good gas mileage is because I'm a lead foot, but how could I be anything other than that driving a CX-7?!?!?! :)
  • sdbobo619sdbobo619 Posts: 13
    I have had a weird white smoke when idling the vehicle cold, has only happened about 3 times in the 2 years I have owned the vehicle....

    Never had black smoke and dont notice turbo lag....
  • smokingmazdasmokingmazda Posts: 1
    edited March 2010
    Mazda CX7 Smoke After Idle Like this? Been having the same smoke problem for about a year now, and they're finally approved for a turbo replacement next week.">link title
  • wwestwwest Posts: 10,706
    1-2 second re-acceleration downshift delay...YES!!

    Goggle:

    abolition hesitation wwest -dfg
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