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Thread: Car shakes while idling

  1. #51
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    Default Re: Car shakes while idling

    Quote Originally Posted by rockhead View Post
    Got the same problem. Cleaned the TB and MAF which solved the idle hunting between 750 - 500 prm, but car shakes while idling and suddenly drops down to below 500 rpm before the ECU kicks it back higher - almost stalls. Went to the local dealer parts guy, but he insists that a bad purge valve would throw a code, which mine hasn't yet. The engine mount SEEMS to be ok as you cannot feel any engine vibs at the bolt locations, but I may replace based on results from replacing purge valve. BTW does anyone know where I can find a good parts dept in the GTA? The guy at Ajax Mazda doesn't seem to know what part no. will fit my '05 2.3?
    Hey my purge selenoid vlve did not throw a code for a long time. it did after a month of stalling so you dont have to have a code thrown at you. there is a easy way to check it which i described in my previous post. other way to check it would be disconnecting the hose that goes from the valve to your heat shield and see if you can feel the vacuum . if you can then its bad. but again those valves do work 60% of the time even if they are faulty so sometimes it would close how it supposed to and sometimes it would become stuck. you can try taking it out and cleaning it with some gunk cleaner , just spray some inside and it might help for a bit. but i know there have been many revisions of that valve because of this problem. so its recomended you get a newest part straight from the dealer. its not worth byin it from anywhere else cuz u might get older revision which will do the same thing after few months.

  2. #52
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    Default Re: Car shakes while idling

    My 2005 Mazda 3 80,000 was stalling when idling low.( red lights, stuck in traffic )
    The only way to prevent stalling was to drop it into neutral and bring the rpms up. I bought the Purge Valve from autopartswarehouse.com for 70.95. I changed the part in about 15 minutes. It couldn't have been easier to do. The dealer wanted at least one hour plus 120 for the part.

  3. #53
    Jr Member zmz3's Avatar
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    Default Re: Car shakes while idling

    My MZ3 2007 GX was rough idling at red lights and stop signs. Mileage was around 81,000km's, I read and searched here, it seemed the cheapest thing to do at the time to see if it works, is a Throttle Body clean. Got that done, and the rough idle is gone.

    I will update if anything changes and/or the rough idle resumes.
    Last edited by zmz3; 02-08-2011 at 04:57 PM. Reason: spelling

  4. #54
    Newbie hfdayc's Avatar
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    Default Re: Car shakes while idling

    i got same problem few months ago.

    i search the web and find the Thread.


    Just change the #3engine mount, i got from dealer around $120, changed at Street Performance. Problem solved

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    Default Re: Car shakes while idling

    Hey guys,

    Recent I got a 2004 Mazda 3 with 74,000 KM.

    Over the past few days I realized while I am at a red light or stop sign the cars rpms hover just under 1000 (maybe 7-800 and sometimes around 5-600) and it sort of starts to shake and run rough.

    During drive its fine and idling while in park seems to be fine although I haven't really monitored it.

    Thanks
    Shawn

  6. #56
    Noob Aenema's Avatar
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    Default Re: Car shakes while idling

    I had the same issue about 18 months ago and did a throttle body service along with my oil change. That fixed the problem.
    Its happening again now, not sure if i need to a TB done again or perhaps its the engine mount that needs to be changed. Will be taking the car in for service and will advise.
    2008.5 Mazda 3 GS

  7. #57
    Jr Member stefanb's Avatar
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    Default Re: Car shakes while idling

    What's the part # for the valve?
    2018 3 GT

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    JDM to Euro DumpInfo's Avatar
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    Default Re: Car shakes while idling

    Quote Originally Posted by hfdayc View Post
    i got same problem few months ago. Just change the #3engine mount, i got from dealer around $120, changed at Street Performance. Problem solved
    +1 - I had the same problem when I had my 3 could be the engine mount!

    Mine still shakes now but it's a deeezeeel!

  9. #59
    Member Cab0oze's Avatar
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    Default Re: Car shakes while idling

    Mazda3s tend to shake a lot when idling because they want to be driving and get impatient just sitting around.






    Canada gave us rust and DRL. Thanks for nothing Canada!

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    Default Re: Car shakes while idling

    I just did a throttle body service today and I no longer have any shaking/idling rough

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    Default Re: Car shakes while idling

    well crap I created another thread on this exact problem.


    I changed my battery other day and after that in drive at stop lights RPM is dipping really low and is about to stall.

    Never had problem before that. It was the original panasonic battery that came with 3 lasted good 6 years.

  12. #62
    Member sarujo's Avatar
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    Default Re: Car shakes while idling

    you need to clean the throttle body and MAF sensor and then reset the ECU - disconnect battery routine...

    Quote Originally Posted by mcf_24 View Post
    well crap I created another thread on this exact problem.


    I changed my battery other day and after that in drive at stop lights RPM is dipping really low and is about to stall.

    Never had problem before that. It was the original panasonic battery that came with 3 lasted good 6 years.


    2010 Sport 2.0L 5MT

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    Default Re: Car shakes while idling

    I've had this problem in my 2014 since new (Bought in June 2014, 22000 km on it now) and have been annoyed by it, but haven't said anything to the dealer yet. I am taking it in to be serviced tomorrow and maybe I will ask them to look into this issue while the car is in. It's weird that it would happen on a brand new car.

  14. #64
    Jr Member thirdgen3's Avatar
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    Default Re: Car shakes while idling

    Quote Originally Posted by Cab0oze View Post
    Mazda3s tend to shake a lot when idling because they want to be driving and get impatient just sitting around.






    El o el...

  15. #65
    Member Stathakos's Avatar
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    Default Re: Car shakes while idling

    Thanks for reviving this thread. I did it about 11 months ago and I'm starting to feel the rough idle come back.

    Also does anyone know if cleaning the air filter will extend the interval needed for TBC?

  16. #66
    Jr Member Zotaga's Avatar
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    Default Re: Car shakes while idling

    Quote Originally Posted by Stathakos View Post
    Thanks for reviving this thread. I did it about 11 months ago and I'm starting to feel the rough idle come back.

    Also does anyone know if cleaning the air filter will extend the interval needed for TBC?
    1) Passenger Engine Mount
    2) Spark Plugs/Misfire
    3) MAF Sensor (Clean It)

    Also, when unhooking the battery, you need to turn on the car and let it idle for 5-10 minutes.. touch nothing.. let the car re-learn the idle..

    That's just from my experience..

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    Default Re: Car shakes while idling

    Quote Originally Posted by Sinisa View Post
    Hey I was wondering if anyone was having the problem I have.

    My 2005 Mazda 3 GT sedan shakes while I am at a red light or when I am stopped and the engin is still running. It shakes once every 20 to 30 seconds and the RPM jumps to 1000rpm from 500rmp.

    Did anyone eles have a problem like this or might know what is wrong?
    Mine does the same thing after a warm day one hour drive. the rpm moves up and down a bit too. I never bothered to check out on that lol

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    Jr Member Zotaga's Avatar
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    Default Re: Car shakes while idling

    Quote Originally Posted by Daylindafung View Post
    Mine does the same thing after a warm day one hour drive. the rpm moves up and down a bit too. I never bothered to check out on that lol
    Passenger engine mount.. put a jack under your engine, lift the engine slightly, remove the bolts and pull it out and take a look at it.. if the rubber is separated, that's your problem.

    It stops the vibration at least.. but the RPM thing will still happen.. mine drops and jumps too.. it might need an ECU upgrade..

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    Newbie ssolidd's Avatar
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    Default Re: Car shakes while idling

    Mine was shaking intensely along with the NOISE driver and passenger side seats feels like having a built-in back massager this is due to my upgrades jbr Duro 80a passenger side mount,jbR Duro 80a rear mount, transmission mount is stock driving it feels like nissan maxima and eats gas alot due to powerful launch and stiffer engine.

    My racing days are over preferred the calm and peaceful driving downgraded to stock passenger mount again but still keep the jBr rmm now it feels like driving an accord : p .
    Last edited by ssolidd; 12-09-2015 at 09:58 AM.
    2008 mazda3gt sedan

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    Default Re: Car shakes while idling

    After many month having this shaking problem and wasting money on expensive parts I found this,,, disconect the brake switch , press the brake and there is NO MORE Shacking,, today Im going to make some test on those brake cables, does anyone know where this brake switch goes to the computer?

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    Default Re: Car shakes while idling

    Quote Originally Posted by Charles View Post
    After many month having this shaking problem and wasting money on expensive parts I found this,,, disconect the brake switch , press the brake and there is NO MORE Shacking,, today Im going to make some test on those brake cables, does anyone know where this brake switch goes to the computer?
    Following the brake switch cable it goes to the fuses down the glove compartment,,, the is a red cable with yellow line and gray dot,, disconect it and the problem is gone.... Only that the shift stop working , so i believe is the PJB damage

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    Default Re: Car shakes while idling

    Quote Originally Posted by Charles View Post
    Following the brake switch cable it goes to the fuses down the glove compartment,,, the is a red cable with yellow line and gray dot,, disconect it and the problem is gone.... Only that the shift stop working , so i believe is the PJB damage
    Hello did someone found a fix, mine is doing the same thing
    When I remove the brake fuse the idle is pefect in drive
    Did change everything on it

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