Shaky Exhaust

[Guest]

Hi

My newly acquired 2010 IQ, 15k miles has a shaky exhaust on start up and tick over.

Thought a uprated and stiffer exhaust rubber mount may help but for the age of the car it shouldn't need it.

Is this a characteristic of the car or some kind of problem?

Thanks

[sweet-dentist]

Sounds like the first rubber attachment thingie is worn out...

The exhaust-pipe hangs in a couple of rubber-thingies... have them checked...or replaced anyway...

[tarquin]

Also if its the 1ltr 3 cylinder model the there is a bit of engine rock on idle. You can see the passenger seat vibrating

David

[Guest]

Thanks for the replies.

Yes it is 1ltr; so the engine rock is normal?

[bobkneale]

My view - I have a 2010 1ltr 3 cylinder manual IQ with 30,000+ miles and before my EGR was changed I had shaky exhaust and rocking engine, plus a passenger seat that vibrated quite a lot on idle, after my EGR was changed plus I also started using Shell plus V power fuel and also ran some quality fuel system cleaner through a couple of times and things are much much smoother now than before, even with a quite low 700 RPM tick over.

Each one of the above things improved the smoothness of the tick over.

I would not have thought that the exhaust rubber bushes should be worn out yet ?

Of Course i might be wrong !

It also depends upon how you are defining the level of "Engine Rock" as it is a "subjective" statement. And 3 cylinders are likely to be less smooth.

[Guest]

No I agree; exhaust mounts should be fine given age and mileage.

I am conscious of the egr issue.

Currently, I can't achieve higher than 55mpg and I cover motorway/A roads for 20 to 50 miles per run. The passenger seat did shake quite a bit but after v power things have settled bit only slightly. On tick over the engine visibly shakes a little but nothing that looks overly concerning. Also, when i follow the shift indicator the engine bogs and strains even on flat ground.

When I picked the car up from the dealer I was getting 60mpg avg, and that was on regular fuel.

Do the behaviours and 55mpg return sound typical of a normal runnibg IQ (or not!)?

Thanks for the replies

[sweet-dentist]

Remember please...that this is a 3 cylinder engine... It has an inherent balance...

Please read this...about halfway they talk about numbers of cylinders.....Here:

http://en.wikipedia.org/wiki/Straight-three_engine

Discussion about "primary and secondary moments" of the 3 cylinder engine..Here: http://www.honestjohn.co.uk/forum/post/index.htm?t=64402

Some more info here:

http://en.wikipedia.org/wiki/Engine_balance

[bobkneale]

No I agree; exhaust mounts should be fine given age and mileage.

I am conscious of the egr issue.

Currently, I can't achieve higher than 55mpg and I cover motorway/A roads for 20 to 50 miles per run. The passenger seat did shake quite a bit but after v power things have settled bit only slightly. On tick over the engine visibly shakes a little but nothing that looks overly concerning. Also, when i follow the shift indicator the engine bogs and strains even on flat ground.

When I picked the car up from the dealer I was getting 60mpg avg, and that was on regular fuel.

Do the behaviours and 55mpg return sound typical of a normal runnibg IQ (or not!)?

Thanks for the replies

I personally don't believe that your IQ should be "bog and straining" on level ground when using the green "up shift" change indicator mine does not.

[Guest]

Well from reading associated EGR pipe posts on this forum, I believe I should be getting higher mpg than 55mpg. Coupled with pull away and gear change engine load troubles, I have booked the car in for a review of the EGR pipe.

Thanks for all of the comments and advice.

[tarquin]

Dont forget to read Bobneale's excellent EGR letter if your thinking of having it changed as it wasnt a recall but a bulletin notice and depending on the dealer you could be arguing about payment

David