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My 2003 Nissan 350z is idling high.?

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Old 11-26-2011, 06:24 PM
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poncholee
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Default My 2003 Nissan 350z is idling high.?

Hi need help with this its a bit frustrating. I installed a new throttle body with gasket and now it is idling at 1k and 1,2k with a/c on. It was doing the same thing prior to the install I figured it should fix the problem. but it hasn't. i have done the relearn and ecu reset. With the relearn it would drop the the rpm to 750, when when i start the car it would go back to 1k. the SES lights goes back on. i have had the code read and each time its p0507. anyone have a clue on whats going on? i killed the battery in hopes it reboots everything.
Old 11-26-2011, 06:27 PM
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mr. sparco
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Check all vacuum hoses, intake manifold/upper plenum for leaks.
Old 11-26-2011, 07:06 PM
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SparkleCityHop
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Is everything stock/OEM or do you have mods?
Old 11-26-2011, 07:28 PM
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the car is stock.
Old 11-26-2011, 07:53 PM
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Deteria
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whoops posted in wrong page

Last edited by Deteria; 11-26-2011 at 07:54 PM.
Old 11-27-2011, 05:28 AM
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DavesZ#3
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Disconnect battery overnight. Reconnect next day, do first two relearns steps from here...

https://my350z.com/forum/6008226-post2.html

Drive car around to get engine hot then repeat all three relearn steps. I was having the same problem about two months ago then ran across several threads from people who couldn't get their idle to stabilize or drop to 750 - their solution was the hard reset of the ECU.

Last edited by DavesZ#3; 11-27-2011 at 07:04 AM.
Old 11-27-2011, 05:37 AM
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taywan
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same what dave said, i did all relearns and didnt do much until i disconnected batt overnight, and next morning, it was fixed after warm-up. one of the steps should clear the c.e.l. tho.... u had the prob before tho?? then u replaced the t.b.?? if u didnt disconnect batt before install also..GL
Old 11-27-2011, 06:10 AM
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thanks for the feedback. i disc the battery for two hours and the idle went back to normal.
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