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Go Back   REVscene Automotive Forum > Technical Discussion > Maintenance, Engine & Driveline Tech

Maintenance, Engine & Driveline Tech This forum is brought to you by The Speed Syndicate (TSS) in Burnaby.
Discussion of maintaining your engine, transmission, differentails, rear ends, and mods associated with "driveline" parts..

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Old 11-27-2011, 11:54 AM   #1
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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?
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Old 11-29-2011, 12:12 PM   #2
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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.
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Old 11-29-2011, 03:46 PM   #3
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IAC passageway and valve needs cleaning?
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Old 11-29-2011, 05:03 PM   #4
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Originally Posted by fliptuner View Post
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.
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Old 11-29-2011, 05:48 PM   #5
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What car is this?
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Old 12-12-2011, 06:50 PM   #6
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2011 honda accord
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Old 12-12-2011, 10:06 PM   #7
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Could you get it checked for free under warranty?

And still haven't figured the problem eh?
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Old 12-13-2011, 10:39 PM   #8
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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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