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Rev needle is moving up and down by 50-100 rpm on idle

8629 Views 5 Replies 5 Participants Last post by  jorellaviso.1020
Hi All,

I have 2014 Cruze Equip (auto transmission) Australian model. Rev needle is moving up and down by 50-100 rpm on idle (regardless of which gear selected. Mileage is 46000km. I took it to dealer and after 4 days later they told me that for this age and mileage it is normal. Yeah but I checked at least 4 other Cruze cars those older than my car and with more mileage. Rev needle was not moving even 1 rpm on those cars. I also checked some other cars different brand, same, rev needle doesn't move on idle at all.

If my car is normal then all others in the world not normal :):)

Although car is still under factory warranty, dealer told me that they would charge me labour fee to find that exact cause of the issue. This is funny... I raised this with Holden the manufacturing company in Australia.

Any thoughts?
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This is normally a sign of a vacuum leak. Check your dip stick for a solid seal. Also, does the Holden Cruze have a PCV valve? If so it may be leaking. I know http://www.cruzetalk.com/forum/34-gen1-1-4l-turbo/175793-cruze-1-4l-gen1-pcv-system-explained.html is for the North American 1.4T engine but it will be similar for all the Ecotec engines used in the 1st Generation Cruze.
Agreed, unstable idle is probably a vac leak.
This is normally a sign of a vacuum leak. Check your dip stick for a solid seal. Also, does the Holden Cruze have a PCV valve? If so it may be leaking. I know http://www.cruzetalk.com/forum/34-gen1-1-4l-turbo/175793-cruze-1-4l-gen1-pcv-system-explained.html is for the North American 1.4T engine but it will be similar for all the Ecotec engines used in the 1st Generation Cruze.
My car has 2 litre non-turbo engine. I am not sure if it has PCV valve or not. To be honest I don't understand from car mechanics at all. I would assume whatever you suspect should be thought by dealer as well. My car stayed with them 4 days. Trying to organize another dealer visit.
My car has 2 litre non-turbo engine.
No, it most certainly does not have a 2.0l non-turbo engine.

If it is 2.0l, it is a turbo-diesel.

If it has no turbo-charger it is a 1.8.

I suggest that you take it to another dealer, it sounds like the one you are dealing with is useless.

I can't recommend any in Sydney, maybe one of the other Aussies who lives there can.
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