Weird engine response.. anything to worry about?

[Tkseah]

This morning when i first started the car engine, it automatically rev up to ~2.5k rpm for about 5 sec before settling down to the normal idle of ~1k rpm.. 1st time i every encountered this.. anyone got idea what could have caused it and if it is anything to worry about??

[DarkLord]

Sounds ok to me.

[Tkseah]

Ok? Normally it will just go straight to idle at ~1.1k, without reving at ~2.5k for 5 secs..

[Furrynadz]

dirty throttle body

[Ccssgm]

Is Normal....If shoot up to 3.5K.....U need to worry....

[Lucien]

Hi, for accent this a normal problem.

How i know, i experiment on this. I tried and able to repeat this for many times. HOHOHO

 

This is cause by fast crank.

Instead of u crank the car to start and hold it there for about 1 secs to let the car start, u did release the crank too fast.

 

Thus, there is a current surge from your battery. Nothing to worry about.

If problem persist, check if your throttle cable got problem or not. It should be free from any obstruction.

[Tkseah]

Thanks guys.. now i can sleep easier without worrying that it'll burst into flames on me..

 

Next servicing is planned for 3 weeks time.. so hopefully they will spot if anything need tweaking..

[Loner911]

what car you driving?

[Lucien]

no worry no problem one.

[Emils]

Mine does that sometimes too. Haha. It's still working fine (at least on the surface). :P

[Dwoon]

Its perfectly normal for the ECU to run the car at fast idle during cold starts. If you ask me, 5secs is really short.....

 

Mine on cold starts will run at ~ 2.5K for about 30 secs... then slowly gets lower at around 1.5K rpm by the 1st min. Then gets lower to about 1.2K rpm by the 2nd min. and finally around 900 at 3rd min.... it takes around 5 mins of warm up for it to get down to ~ 800 rpm idling, by which time the oil temp is like 75deg.

Edited May 28, 2007 by Dwoon

[Swmc]

Don't worry about it

[Tkseah]

Normal ah.. guess i mountain tortise cos this is 1st time i encounter..

 

Usually mine will start idling at 1.1k and settle down to 0.9k after 1-2 mins..

[Dwoon]

DIfferent car makes & models have their own programming for warm up.

 

Like for mine, if I want to save petrol, then I just tap the throttle and the rpm drops immediately from 2K ought to about 1.2K rpm for the warm up.

 

But for some other cars, the tapping of throttle does not do this.

[Mzrmazda3]

Bro, it's normal

 

Once engine started to warm up, the rpm will naturally reduced

 

If your RPM still remains at 2.5K RPM after it has been warmed up then you gonna start worry