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Nissan Primera P12 - RPM when cold and stopping?
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steveshaltz View Drop Down
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Points: 12 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steveshaltz Quote  Post ReplyReply Direct Link To This Post Topic: Nissan Primera P12 - RPM when cold and stopping?
    Posted: 16 Feb 2010 at 1:11am
OK, here's one for you.
From a cold start, the idle is around 1500rpm, after a few mins or a bit of driving, idle settles to to the norm. This may be normal for a cold start and unconnected (I haven't had the car for long). The main issue is this;
When I stop at traffic lights, or at a junction (clutch and brake) the revs surge to about 2000rpm, then drop to normal. I thought the first few times that I was catching the accelerator with my shoe when braking, but no, bigfoot did not strike here. Asides from the annoyance, I feel like a twat pulling up at lights!Cry
What are your initial thoughts on this? Sticking butterfly? MAF sensor TPS?

Cheers for any suggestions.
Steve.
2006 Primera P12 1.6  QG16DE engine
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essNchill View Drop Down
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Nissyen Gaius Fluff

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Points: 53632 		Post Options Post Options   Thanks (0) Thanks(0)   Quote essNchill Quote  Post ReplyReply Direct Link To This Post Posted: 16 Feb 2010 at 1:16am
Hi Steve.
 
All of that is absolutely fine fella.
 
On choke the idle will be around 1500 before settling when warm.
 
The revs will rise as you come to stop, due to the anti stall device all Primeras have built in... You will get used to it and you'll also find different ways of getting around it (driving style etc).
 
Take care,
Shaun
Pretty In Pink - 89 Loon - essNchill Edition
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steveshaltz View Drop Down
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Points: 12 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steveshaltz Quote  Post ReplyReply Direct Link To This Post Posted: 16 Feb 2010 at 1:45pm
Built in anti stall? what will they think of next? probably have a car one day that changes gears for you, or turns on the wipers in the rain! - Modern technology!

But seriously though, thanks for the quick reply Shaun.
Steve
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steveshaltz View Drop Down
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Points: 12 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steveshaltz Quote  Post ReplyReply Direct Link To This Post Posted: 09 Mar 2010 at 9:36pm
This one was still bothering me, idle too high and the surge too high even for the anti-stall feature.

Anywhoo, fixed it!

I did an "Accelerator Pedal Released Position Learning"
followed by a "Throttle Valve Closed Position Learning"

I had to do the above as they are preconditions to completing.....
"Idle Air Volume Learning"
during which my idle went from 1100 down to 300 then up to 750 and stabilised there. Now she starts and idles beautifully, and no longer surges on clutch at traffic lights!

Sweet!

Steve
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timeshock! View Drop Down
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Points: 6740 		Post Options Post Options   Thanks (0) Thanks(0)   Quote timeshock! Quote  Post ReplyReply Direct Link To This Post Posted: 09 Mar 2010 at 9:55pm
where did you find that little gem of information?
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steveshaltz View Drop Down
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Points: 12 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steveshaltz Quote  Post ReplyReply Direct Link To This Post Posted: 09 Mar 2010 at 10:48pm
In the Nissan FSM, Engine Control section (EC) pages 55 to 57 Wink
Steve
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jayw View Drop Down
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Points: 152 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jayw Quote  Post ReplyReply Direct Link To This Post Posted: 16 Mar 2010 at 9:51pm
Is there a similar fix for a P11 as mine does this at times too,sometimes worse than others?
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steveshaltz View Drop Down
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Points: 12 		Post Options Post Options   Thanks (0) Thanks(0)   Quote steveshaltz Quote  Post ReplyReply Direct Link To This Post Posted: 13 Jan 2012 at 12:33am
Just thought I'd mention that I believe I now know what causes this odd over-rev.
I stalled the car when pulling off at the lights, so I just clutched and cranked the key in the blink of an eye. The next time and subsequent times that I clutched and stopped at junctions lights etc, the engine over-rev came back.

My conclusion is that re starting the car, immediately after a stall, without going to neutral, without letting the car "think" screws up the stored settings for throttle zero position and idle air volume.

The moral of the story?

Learn to drive Steve! Tongue

Steve.
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