Question about 2004 Mazda RX-8

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Mazda rx8 rough idle and stalls when at operating temp okn cold

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  • edmonton7 Jul 31, 2009

    need help mazda rx8 idles rough and stalls

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Use seafoam to remove carbon build up.Redex is injector cleaner.Seafoam is specific for carbon build up.There are many guides if you search and the best way is through the intake ports on the inlet.
Search decarbon rx8,be prepared as it lay not work and could be compression

Posted on Jun 01, 2012

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Build up of carbon on rotor tips. Start using redex on every petrol fill up
May take a month to improve

Posted on Nov 23, 2011

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Hello i have a 2003 rx8 and its giving hard start when warm and not idling. can some one tell me how to solve this problem

Posted on Sep 05, 2010

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If there are no vacuum leaks, change idle control sensor.

Posted on Jul 28, 2009

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Related Questions:

2 Answers

Rough idle and stalling


it will have codes but the scanner in use doesn't have the right protocol for reading them
Indicates a faulty ambient air temp or BARO sensor so there will be codes

Aug 01, 2017 | 2008 Acura Rdx

1 Answer

Had a question bout my mazda rx8 I was driving it one night it was running fine the next day went out and it won't turn over it takes awhile bit it finally starts and idles real rough and you give it...


Too many possibilities

Won't turn over is one problem -battery,cables,grounds,
starter,solenoid,etc

Idles rough-- vacuum leaks,spark plugs never replaced,
egr valve etc

Worn O2 Sensors
Dirty MAF Sensor
Old Fuel Filter

You have to go into a lot of technical detail & history
on your vehicle, for us to even guess.

May 23, 2011 | 2005 Mazda RX-8

1 Answer

I got a 2003 mazda protege 2.0 the check engin light came on. it drives great but when left to idle it sounds like its going to stall.


Could be the Mass Air Flow sensor. But I would check the cold air intake tube first, they are subject to cracking and any hole in it will cause the MAF to give false readings which will trigger the light and cause rough idle, stalling and hesitation.

Jan 31, 2011 | 2003 Mazda Protege

1 Answer

I bought a second car for utility use; B6000, 1994, p/u, standard trans. Only when starting and running when the engine is cold, it runs very rough and difficult to idle. At normal operating temperatures...


a coolant tempurature sensor will make it run to rich if it is bad. run rough at idle, and produce black smoke, engine may stall out. it also causes retarded timing, slow idle speed, cold hesitation or stumble, poor fuel milage. good-luck!! if light is on check for problem code. this will guide you in the right direction. if no scanner, any auto parts store will scan for free. repost if need be. have a good day!!

Aug 13, 2010 | 1994 Mazda 2WD B Series Pickup

3 Answers

Rough Idle when cold runs seems to run ok hot but still almost stalls when you turn on AC and you are at a stop also noticed that the volt meter reads 9v with the AC and the lights on with the AC and...


mcdevito75 here, Sounds like a faulty voltage regulator, it"s 1 unit with the alternator, change the alternator, also the alt. supplies juice to the ignition switch, distributor abd plugs, thus a rough idle due to bad alternator.

Jun 19, 2010 | 1994 GMC Suburban

1 Answer

88 dodge dakota has rough idle and stalls at slow down.


Change/thoroughly clean the idle control solenoid. It may be sticking and causing rough idling.
Cleaning it is unlikely to be more than a short-term solution.

Jan 07, 2009 | 1988 Dodge Dakota

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