JimR123 Posted August 17, 2011 Report Share Posted August 17, 2011 Hi, I'm on my third Mazda MX5 now, my second Mk3 version, but bought this one at only 3.5k miles. I'm getting an undesirable noise when at low revs, mostly when accelerating, even very slightly. I also get the same noise sometimes when changing gear. If I try driving at 10mph, which is 1st gear at about 2k revs, I get the noise constantly. My OH says it sounds like it's a deisel when it makes the noise, but as I've never had a deisel, I couldn't say. To me it kind of sounds like something's rattling, but only in those certain circumstances. It sounds like the noise is coming from underneath rather than in the engine area. I had noticed the noise a little when I took the car for a test drive, but when I mentioned it to the sales guy, he just said he didn't notice anything unusual, but he'd get the guys in the garage to check it over before handing it over. I assumed that it was perhaps just because it only had a few miles on the clock, and just needed running in or something. Well, 5k miles later, and still the same noise. The car is a MX5 Mk3 Coupe Sport Tech 6speed... http://www.whatcar.com/car-reviews/mazda/m...r/summary/56840 Can anybody please suggest what might be the trouble here? Is it normal? ...because if it is, I wish hadn't bought the car as it sounds really cheap and nasty, which I don't expect for the £18k I paid for it. Annoyingly, my old MX5 Mk3, which I replaced with this, didn't make any such noises, but instead at low revs made a satisfying growling noise to remind you to shift down. Quote Link to comment Share on other sites More sharing options...
Tony Posted August 17, 2011 Report Share Posted August 17, 2011 I would say not normal..... It also reads like the timing is out? Quote Link to comment Share on other sites More sharing options...
JimR123 Posted August 17, 2011 Author Report Share Posted August 17, 2011 I would say not normal..... It also reads like the timing is out? Would bad timing not be noticable at higher revs too? To my untrained ear it seems to sound ok at higher revs. ...allthough different to my old Mk3. I put that down to the fact that it always feels like I have to rev it higher. Quote Link to comment Share on other sites More sharing options...
Tony Posted August 17, 2011 Report Share Posted August 17, 2011 I think the timing changes with RPM Quote Link to comment Share on other sites More sharing options...
JimR123 Posted August 17, 2011 Author Report Share Posted August 17, 2011 I think the timing changes with RPM Ah, ok. And is timing something that is easily adjustable? Quote Link to comment Share on other sites More sharing options...
Tony Posted August 17, 2011 Report Share Posted August 17, 2011 Doubt it knowing modern cars, a job for Mazda methinks. Quote Link to comment Share on other sites More sharing options...
SMARTLY Posted August 17, 2011 Report Share Posted August 17, 2011 Perhaps make a sound clip, would make it easier to diagnose. If it's only done 3.5k miles I'd take it to a Mazda dealer. Quote Link to comment Share on other sites More sharing options...
Funky Posted August 17, 2011 Report Share Posted August 17, 2011 Jim was your last mk3 a 5 or 6 speed box, cos they sound different. It's made to resonate off the intake or something. Only on six speed versions. Just a thought Quote Link to comment Share on other sites More sharing options...
JimR123 Posted August 18, 2011 Author Report Share Posted August 18, 2011 Jim was your last mk3 a 5 or 6 speed box, cos they sound different. It's made to resonate off the intake or something.Only on six speed versions. Just a thought Last Mk3 was a 5 speed, so you may be onto something there. If the 6 speed was made deliberately to make a different noise, I wonder why? ...as it certainly doesn't make it sound any sportier. What do you know about this resonation thing? Don't suppose you have any links to sites that go into excrutiating detail, so I can at least try and understand it. Quote Link to comment Share on other sites More sharing options...
JimR123 Posted August 18, 2011 Author Report Share Posted August 18, 2011 Mystery solved! This sounds exactly like the problem... http://www.mx-5.com/Forum/Room/Topic/?topicId=1819 Looks like I'll be visiting my Mazda dealer shortly... Quote Link to comment Share on other sites More sharing options...
Funky Posted August 18, 2011 Report Share Posted August 18, 2011 Jim was your last mk3 a 5 or 6 speed box, cos they sound different. It's made to resonate off the intake or something.Only on six speed versions. Just a thought Last Mk3 was a 5 speed, so you may be onto something there. If the 6 speed was made deliberately to make a different noise, I wonder why? ...as it certainly doesn't make it sound any sportier. What do you know about this resonation thing? Don't suppose you have any links to sites that go into excrutiating detail, so I can at least try and understand it. read it in a magazine a while ago, one of the Banzai writers had a Mk3 as a project car let us know how you get on with the dealer Quote Link to comment Share on other sites More sharing options...
Tony Posted August 18, 2011 Report Share Posted August 18, 2011 Oh wow, how very odd.... I'm also intrigued to hear the outcome. Quote Link to comment Share on other sites More sharing options...
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