Problem with idle speed - 2002 Nissan Sentra GXE 1.8L

Underdog
0

Asked by Underdog Apr 05, 2011 at 08:23 PM about the 2002 Nissan Sentra GXE

Question type: Maintenance & Repair

2002 Nissan Sentra GXE 1.8L

When starting the car cold it immediately revs to 2000 rpm and when it finally warms up it bounces revs between 1500 - 2000 rpm roughly.
If I let it run for a while occasionally the idle will simmer down to just under 1000 rpm as it should but after about another 20 seconds the idle goes up again to just under 2000 rpm.
If I try to press the gas ever so slightly it starts to idle up and down - press the gas a little more and the revs go right to 3000 rpm steady.

I have replaced the throttle position sensor and Air Mass sensor but no luck.
Have also used the carb cleaner trick to try to detect a vacuum leak with no effect.
No computer warning lights are currently on.

Any ideas?

2 Answers

Dustin McRae
215

sounds like a vacuum leak to be honest, i know on the spec v's there's an idle relearn process, but I don't remember it off the top of my head. Since you've replaced the MAF and TPS I'd just go ahead and reset the ECU again, and start it up and let it idle for ~15 minutes without touching the gas.

2 out of 2 people think this is helpful.
Justin Irwin-Rolles
75

sounds like the Idle Air Control valve is shorting out or outright bad.You can try cleaning the valve with PB blast and then MAF cleaner,but it probably will have to be replaced.

2 out of 2 people think this is helpful.

Your Answer

Add photo

Related Questions

Search Nissan Sentra Questions

Nissan Sentra Experts

#1 Doran Harney
Doran Harney
Reputation 650
#2 L_R
L_R
Reputation 560
#3 Tom Demyan
Tom Demyan
Reputation 460
View All

Related Models For Sale

Used Kia Spectra"
47 Great Deals out of 1,337 listings starting at $1,550
Used Volkswagen Jetta"
679 Great Deals out of 35,833 listings starting at $1,495

Used Cars For Sale

2014 Nissan Sentra For Sale
41 Great Deals out of 21,707 listings starting at $11,990
2013 Nissan Sentra For Sale
121 Great Deals out of 2,969 listings starting at $10,000
2012 Nissan Sentra For Sale
140 Great Deals out of 3,533 listings starting at $6,499
2011 Nissan Sentra For Sale
60 Great Deals out of 1,581 listings starting at $5,999
2010 Nissan Sentra For Sale
34 Great Deals out of 703 listings starting at $3,995