On Jan 14, 12:57 pm, Jim Yanik <jyanik@[EMAIL PROTECTED]
> wrote:
> jcb <mail.jun.l@[EMAIL PROTECTED]
> wrote in news:a7733402-c7c7-4fa1-9e1c-
> 980af78b5df4@[EMAIL PROTECTED]
>
>
>
>
>
> > Hello experts,
> > I ran into a weird idle speed problem on my '02 Nissan Sentra SE-R
> > (QR25 engine, 5-speed M/T).
> > After about an hour of hwy driving (~60mph), I noticed that the idle
> > speed was up around 1200 rpm when I stopped at a traffic light.
> > Shortly after got home, while the car is still at normal operation
> > temperature, I performed the "Idle speed learning" procedure (I'm sure
> > I did everything correctly, because I've done that before); however,
> > at this time, instead of having the idle speed drops to
> > ~750rpm, during the learning stage, the engine sets the idle speed up
> > exactly at 1500rpm.
> > I've repeated the idle speed leaning steps few times, but every time,
> > it just sets to 1500rmp (btw, I read this number from the Scan tool
> > and there is no MIL light on. ECU doesn't sense any error)
> > I ran out of ideas. Any hints would be much appreciated.
>
> > Have a nice day
>
> I'm no expert....but
>
> I have a similar problem with my 03 SE-R SpecV.the idle increased to
~1500-
> 2000 rpm,drifted around,and soon enough,set the MIL light with an error
> code of P0507(too fast an idle speed).I had to go thru the idle set
> procedure,too.
> Eventually,the code cleared itself(MIL went out),it took quite a long
> time,though.
> my idle has been pretty stable recently.One thing that bothers me is the
> long time it takes for the RPMs to drop back after I get off the gas
pedal.
>
> there's a tech bulletin out on the power steering pressure switch going
> intermittent,causing idle problems.
> the switch normally tells the ECU to increase the idle when the steering
is
> moved,to keep from stalling.
>
> this site is a big help;http://www.nissanhelp.com/
>
> you can download parts of the factory manual,one DL per 24hr period.
> They list all the bulletins for each Nissan model.
>
> --
> Jim Yanik
> jyanik
> at
> kua.net- Hide quoted text -
>
> - Show quoted text -
Thank you Jim for the quick reply...
I've done some research before posting this msg, so I am aware of the
website you mentioned. I am not sure my issue is the same as the PSP
switch, because while idling, if I turn the steering wheel, I saw the
idle speed changes (by dropping a bit and then jumping back to
~1200rpm again), which means that the ECU receives the feedback from
the PSP switch and reacted accordingly. If the PSP switch is failed as
the bulletin described, then it should be always "ON" and there
shouldn't be any changes while tuning the steering wheel.
I'm not really a mechanical savvy guy, so I'm not sure my analysis
makes sense or not.
I found another website saying that it could be "Idle Airflow
Controller" problem, but I haven't checked it out yet. I'll update the
group once I figured out what the real issue is...
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