[EricSmit]

http://www.cruzetalk.com/forum/64-g...mmon-issues-fixes-2014-2015-cruze-diesel.html
http://www.cruzetalk.com/forum/64-g...any-under-tightened-diesel-intake-clamps.html

These should apply to your diesel as well.

 

[diesel]

I posted a reply to your other thread on this. Possible negative battery cable causing electrical issues. I've not heard of an idle issue on the US diesels.

 

[underhood]

By that i guess you mean the issue mentioned by sticky thread about Negative cable connection on battery? I will check that tomorrow morning together with the tightness of the air intake stuff (I have read that is common issue somewhere else on this forum). Maybe hit it with Dremel a little bit if i see any signs of rust.


I tried quite a lot to diagnose the issue by logic (although with my limited knowledge about cars) and couldn't pinpoint what causes the issue (like why is it sometimes working and sometimes not...).


I was thinking about vacuum leak from break system - i ruled that out because RPMs hold steady idle if car is not moving and i apply break.
Another thing i noticed - when i break with engine and press clutch when RPMs are getting lower -> issue happens it will be RPMs will be going up and down, up and down until car stops. However if i just press the clutch and release brake RPMs will drop below idle return back to idle in 1/2seconds and after that if i break it holds idle RPMs perfectly.


This leads me to belief it may be some sensor/SW issue (but that is my imagination coming from me being SW guy working on similar systems... not automotive but lots of sensors, servos, stepper drives, vacuum/pressurized air, lasers controlled by computer... We call it Mechatronics here).
It seems almost like the SW doesn't know clutch has been pressed? I have cheap USB/OBD interface from ebay... didn't try it yet with Cruze. Do you know if it is possible to log this values with free SW (RPMs, Clutch pedal position, Brake pedal position, Throttle pedal position etc)?

 

[diesel]

By that i guess you mean the issue mentioned by sticky thread about Negative cable connection on battery? I will check that tomorrow morning together with the tightness of the air intake stuff (I have read that is common issue somewhere else on this forum). Maybe hit it with Dremel a little bit if i see any signs of rust.


I tried quite a lot to diagnose the issue by logic (although with my limited knowledge about cars) and couldn't pinpoint what causes the issue (like why is it sometimes working and sometimes not...).


I was thinking about vacuum leak from break system - i ruled that out because RPMs hold steady idle if car is not moving and i apply break.
Another thing i noticed - when i break with engine and press clutch when RPMs are getting lower -> issue happens it will be RPMs will be going up and down, up and down until car stops. However if i just press the clutch and release brake RPMs will drop below idle return back to idle in 1/2seconds and after that if i break it holds idle RPMs perfectly.


This leads me to belief it may be some sensor/SW issue (but that is my imagination coming from me being SW guy working on similar systems... not automotive but lots of sensors, servos, stepper drives, vacuum/pressurized air, lasers controlled by computer... We call it Mechatronics here).
It seems almost like the SW doesn't know clutch has been pressed? I have cheap USB/OBD interface from ebay... didn't try it yet with Cruze. Do you know if it is possible to log this values with free SW (RPMs, Clutch pedal position, Brake pedal position, Throttle pedal position etc)?

Yes it's the one about the negative battery cable extended warranty. it solved some random electrical issues on mine.

To answer your other question, I have a Scangauge II to monitor tings on the vehicle. I am not sure if there are any free apps out there that would work, however. Others may have more info on that.