[paul]

I went to town today to deliver something turned off the engine for about 2 mins,
when i re-started it,    it revved up, all by itself, foot not on the gas , to about 3000 rpm    wooooeee
anyone else had theirs do that ???
thought it wasnt going to stop !!!!!!

Which engine, Paul?

In any case, so many things are monitored by the ECU that I'd not be surprised by this at all... unless it persisted.

[Lakes]

Paul, i have a diesel & so far that has not happened to me, i never touch the throtle when i'm starting. the i30's are fly by wire throtle.
like pip said is it Diesel or Petrol?

[asathorny]

I went to town today to deliver something turned off the engine for about 2 mins,
when i re-started it,    it revved up, all by itself, foot not on the gas , to about 3000 rpm    wooooeee
anyone else had theirs do that ???
thought it wasnt going to stop !!!!!!

When I get my car out of the garage it often revs a little without any pressure on the gas pedal, I have always assumed that I may have placed some pressure on the steering wheel, this way or that, and that the engine is responding to that.  This assumption is based upon me having absolutely no mechanical knowledge whatsoever, so do feel free to ignore it 

Asa

[Shambles]

Which engine, Paul?

Paul has a 2011 1.6 crdi

[Shambles]

I'd say, get it checked out. 3000rpm is high for a diesel, from zero

[Lorian]

Defintely not right, not experienced anything like that   need to get that looked at soon. If they can't spot anything wrong then replacing the throttle position sensor would be the minimum I'd expect them to do.

[paul]

It's not happened again since, but i will mention it to the garage,
my mate said it could be something to do with the emissions,
when something gets clogged with carbon/soot it might burn it off automatically  ??
i also get a slight missfire when cold, only when i ease off the throttle and it is not pulling or holding back.  i will also mention this.

[mtuckeruk]

Yes it has happened to me once, engine rev'd up while I was at traffic circle for about 2 seconds and then came down again. My foot wasnt on the pedal. I had only been driving for about one minute when it happened. Possibly the ECU got confused temporarily? I have the i30 2011 diesel estate

[marvy]

I went to town today to deliver something turned off the engine for about 2 mins,
when i re-started it,    it revved up, all by itself, foot not on the gas , to about 3000 rpm    wooooeee
anyone else had theirs do that ???
thought it wasnt going to stop !!!!!!

Hi Paul, Be carefull with this. Diesels can "run away" when there is any additional fuel in the engine. This can come from just ordinary engine oil. ie. the engine can run just fine on the sump oil if it finds it's way into the engine. This could have happened from a leak in the turbo for example. If it happens again, for no apparently reason I would be getting it checked.

Do a search on youtube for diesel runaway -



Tony

[Dazzler]

Might be a glitch in the current ECU programing because only seems to have happened on the current model (can't recall it ever been mentioned by long term members) 

Would be good if any that have had it happen could mention it to their dealer and suggest they give some feedback to Hyundai..