2007 NC idle dips

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geoff123123
Learner Driver
Posts: 1
Joined: Thu Jun 02, 2016 11:09 am
Vehicle: NC

2007 NC idle dips

Postby geoff123123 » Mon May 07, 2018 3:54 pm

Hi all,

Anyone have any info on rough idle during warm up?

Only occurs if you come to a complete stop after a short drive before the motor has fully warmed up. The RPM will drop to around 5-600.

Any ideas?

Thanks!
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JBT
Speed Racer
Posts: 7946
Joined: Tue Jun 03, 2003 11:00 am
Vehicle: NC
Location: Brisbane

Re: 2007 NC idle dips

Postby JBT » Mon May 07, 2018 7:36 pm

How many km on it?
When were the plugs changed?
When was the air filter changed?
What fuel (RON) is used?
Manual or auto?
Checked the leads to the coils? These can crack within the insulation and may need "splinting". Check the tech pages or search this forum for more info on this.
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project.r.racing
Speed Racer
Posts: 3722
Joined: Sun Jan 18, 2009 10:16 pm
Vehicle: Non MX-5
Location: Glasshouse Mountains, QLD

Re: 2007 NC idle dips

Postby project.r.racing » Tue May 08, 2018 8:30 am

Air bypass valve
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JBT
Speed Racer
Posts: 7946
Joined: Tue Jun 03, 2003 11:00 am
Vehicle: NC
Location: Brisbane

Re: 2007 NC idle dips

Postby JBT » Tue May 08, 2018 8:47 am

MAF needs cleaning?
Battery near flat/failing?
Fuel filter?
Injector(s)?
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