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
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