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Idle speed adjustment

Tiny
TOGOONTUMUR
  • MEMBER
  • 1999 NISSAN GLORIA
  • 6 CYL
  • 2WD
  • AUTOMATIC
  • 200,000 MILES
Dear Sirs,

I have Nissan Gloria 1999, with engine VQ25DD Neo-Di. Scanned the ECU, and error code was the throttle pos. Sensor not correctly adjusted. I have adjusted the throttle pos. Sensor myself, as correctly as I could. Now the engine running in idle speed 1.6, and in D pos. 1.2. The power is too large for PNP and running positions. Always crying lowdly my engine. Please help me how to adjust the idle speed myself. Thanks for your help.
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Monday, December 6th, 2010 AT 9:34 AM

5 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
When you say 1.6 and 1.2, what are you refering to?
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Monday, December 6th, 2010 AT 2:10 PM
Tiny
TOGOONTUMUR
  • MEMBER
  • 4 POSTS
I mean the engine tahometric measurement (RPM).
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Tuesday, December 7th, 2010 AT 2:38 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
Okay, if I understand the RPM is too high. If you continue to turn the screw counter clockwise, it should drop the idle speed.
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Tuesday, December 7th, 2010 AT 4:42 PM
Tiny
TOGOONTUMUR
  • MEMBER
  • 4 POSTS
Dear sir, where is the screw counter for the adjustment of idle speed for the neo engine VQ25DD Neo-Di? I think this engine's throttle is electrically controlled. Help me?
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Wednesday, December 8th, 2010 AT 8:33 AM
Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,755 POSTS
It could be electric. In that case, the idle air control valve could be the issue. If there is an adjustment, it will be where the throttle returns to the TBI.
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Wednesday, December 8th, 2010 AT 6:00 PM

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