2008 Mazda3 with Rough Idle

[Maitlsa]

I have a 2008 Mazda 3 automatic that has a rough idle when waiting at lights, or stop signs. It is getting pretty bad and I only have 6200 miles on it. I took it to the dealership to have them check it out and they told me there was nothing they could do because the check engine light was not on. Does anyone have any ideas or have had the same problems?

 

[vladjan]

i had a similiar problem. it could be the engine mount. Mazda 3 is known to have the engine mount problem, but my car is an 04, yours is 08 maybe they upgraded the engine mount, who knows. Find out at the dealership. Another possiblity could b is that your fuel pump is malfunctioning.
let me know what you find out

 

[Maitlsa]

Well, I will keep you posted, but the dealership is giving me issues and say there is nothing they can do because there is no check engine light on. Very irritating.

 

[my3needsaname]

My 3 is an 08.5 with 5700 miles and the moment it rolled over 5000 the engine felt like it was going to fall out. the roughest idle ever, it's such s*** it's not even funny. Go try and get the oil changed at a different dealer and ask them about it. An oil change should be the very first thing they offer you even f you have to pay for it.

 

[vladjan]

yea the engine check light would not light up if the engine mount is broken.

 

[GoFast]

if you have a brand new car and your dealership won't do anything because "there isn't a check engine light" then you need to find a new dealer.

 

[MazdaMark3]

Rough Idle

I am also experiencing a rough idle while at a full stop. The RPM's are usually between 5 & 10. Sometimes it surges slightly. Its never stalled..at least yet.

I have an 08 M3 GT. Next time I am taking my car in to get the oil change, I am going to have them look at it. As well as fixing(or replacing) my stock radio for the volume cutting out problem. My car was produced between Jan and Mar 08 which is the range in which they have problems with it.

 

[my3needsaname]

if you have a brand new car and your dealership won't do anything because "there isn't a check engine light" then you need to find a new dealer.

YES. x4520983756139485712389590346587580942386

I am also experiencing a rough idle while at a full stop. The RPM's are usually between 5 & 10. Sometimes it surges slightly. Its never stalled..at least yet.

I have an 08 M3 GT. Next time I am taking my car in to get the oil change, I am going to have them look at it. As well as fixing(or replacing) my stock radio for the volume cutting out problem. My car was produced between Jan and Mar 08 which is the range in which they have problems with it.

Make sure the A/C isn't on when you feel the surging. The A/C compressor put a massive load on the engine and it accommodates it by shifting between 500 and 750 to make sure the engine doesn't stall out.
It surges a bit to adjust for other things too but not as much as with the A/C on.

 

[flash75]

{if you have a brand new car and your dealership won't do anything because "there isn't a check engine light" then you need to find a new dealer.}

I agree.

Clifton

 

[Maitlsa]

I am taking it in next week for an oil change so we will see what they say. Just makes me upset that it has to come down to this.

This whole thing started around 5000 miles as well.

 

[my3needsaname]

I am taking it in next week for an oil change so we will see what they say. Just makes me upset that it has to come down to this.

This whole thing started around 5000 miles as well.

Interesting...it's like these things have a self-destruct clock in them set for 5000 miles. Way to go Mazda! (protest)

 

[Maitlsa]

No kidding, very irritating, seriously thinking about trading it in since they say nothings wrong with it....

 

[my3needsaname]

No kidding, very irritating, seriously thinking about trading it in since they say nothings wrong with it....

Check your lemon law, you may qualify if you feel like going that route. I know my car is bad enough to go that route. Third dealer(other two didn't do anything), brought in a list of 16 items they said they could fix 80% of those things...we'll see. I might LL it anyways because I don't want to go through this again in a month.

 

[MazdaMark3]

YES. x4520983756139485712389590346587580942386

Make sure the A/C isn't on when you feel the surging. The A/C compressor put a massive load on the engine and it accommodates it by shifting between 500 and 750 to make sure the engine doesn't stall out.
It surges a bit to adjust for other things too but not as much as with the A/C on.

I know the A/C puts "strain" on the engine while its on but this isnt the case with mine. I make sure that when its idling the A/C isnt on. In fact nothing is on when it does it. My rough idle doesnt sound as bad as some others that are posting on here, but still its a new $21K vehicle. Like I said I will take it in to have them take a look at it when I get my oil changed next time. Hopefully my dealer wont be as bad as some others Ive read about on here.

 

[my3needsaname]

Well that was one way it kinda fluctuates. My car does it both times, just worse when the A/C is on.
Hopefully your dealer will be more helpful than the 3 I've been to. Good luck!

 

[chrissor]

sounds to me like early signs of a faulty purge solenoid, which is very very common on these cars, if your dealership won't do anything because the MIL isn't on then remove the pre solenoid line and run the car at operating temperature so that it completes a drive cycle. this will set the MIL. bring the car to the dealership with the light on. it will set a code can't think of the actaul code right now, but it will be system to lean at idle bank 1. which is an evap code. under mazda warrenty they will determine it as a bad purge solenoid if they do proper diag. then they will put a new one in.

 

[my3needsaname]

Cool! Ways to screw up my car part 1:...

 

[vladjan]

yea dude its ur motor mount i bet u. at idle its rought when u ad AC it gets rougher. i had the same exact problems. mazda 3's are known for havin engin mount problems

 

[Maitlsa]

Can the dealership fix the engine mount? Or what do they have to do?

 

[NCZ13]

they replace it with another one.