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-   -   RPM when starting a car (https://www.revscene.net/forums/658455-rpm-when-starting-car.html)

mr_chin 11-27-2011 11:54 AM

RPM when starting a car
 
You know how when you first turn your key and fire up the engine, your RPM surges to 2500 (or so) rpm with a nice perfect va-room and then goes back down to 1000 (or so) rpm?

Why is it sometimes it surges to 1500rpm or even 1000rpm, with a va-(choke choke)-room? Is this normal?

What's the reason that causes this?

fliptuner 11-29-2011 12:12 PM

Are you letting your fuel pump prime before trying to start? Or do you just stick the key in and crank right away?

It's good practice to turn the ign. ON then wait a few seconds for the fuel pump to prime before cranking. Otherwise you're cranking while the fuel's still trying to get to the engine.

subordinate 11-29-2011 03:46 PM

IAC passageway and valve needs cleaning?

mr_chin 11-29-2011 05:03 PM

Quote:

Originally Posted by fliptuner (Post 7708062)
Are you letting your fuel pump prime before trying to start? Or do you just stick the key in and crank right away?

It's good practice to turn the ign. ON then wait a few seconds for the fuel pump to prime before cranking. Otherwise you're cranking while the fuel's still trying to get to the engine.

yea i do that now.

was just wondering what causes the rpm to be different every time.

i'm no expert in cars, so i'll need to find where the iac is.

bcrdukes 11-29-2011 05:48 PM

What car is this?

mr_chin 12-12-2011 06:50 PM

2011 honda accord

subordinate 12-12-2011 10:06 PM

Could you get it checked for free under warranty?

And still haven't figured the problem eh?

jribchester8 12-13-2011 10:39 PM

can you explain the noise a little more ? doesnt sound normal.. could be a loooot of things. does it ever not turn over?


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