Saturday, March 27, 2010

alt.autos.nissan - 2 new messages in 1 topic - digest

alt.autos.nissan
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Today's topics:

* 91 sentra 1.6 liter possible cause of stumble on acceleration? - 2 messages,
2 authors
http://groups.google.com/group/alt.autos.nissan/t/d80d5998d80a5a88?hl=en

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TOPIC: 91 sentra 1.6 liter possible cause of stumble on acceleration?
http://groups.google.com/group/alt.autos.nissan/t/d80d5998d80a5a88?hl=en
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== 1 of 2 ==
Date: Thurs, Mar 25 2010 7:10 pm
From: robbie


On Mar 25, 6:41 pm, "NissTech" <mikeh...@msn.com> wrote:
> after re reading your previous posts , I think what you are experiencing is
> the engine going into fuel cut or rev limiter mode, this feature is built
> into ALL Nissans. the quick and easy fix is not to go to WFO (wide fucking
> open) throttle.
>
> The throttle position switch/sensor have a WOT contact so when you mat the
> thing the contact closes and the rev limiter is engaged
>
> "robbie" <robbie.h.wil...@gmail.com> wrote in message
>
> news:282bd56b-1530-4722-a76a-1be5476586e8@l25g2000yqd.googlegroups.com...
>
> >I just decided on a whim to test the ignition coil because it was
> > something i hadn't thought of looking at before.
> > the specs say the readings should be .9 ohms and 13k ohms. My readings
> > which i took multiple times were 1.6 ohms and 13k ohms. so - any
> > experts out there willing to say that this could be a potential
> > culprit? according to the (Haynes) manual - replace the coil if it is
> > out of spec. So with a higher resistance I am thinking weaker spark? =
> > poor performance? - especially when a lot of fuel is being added to
> > the fire (@WOT) ?
> > If this is the solution I will kick myself for not finding it sooner-
> > i was wholly focused on a fuel delivery/vacuum leak theory and used my
> > shade tree knowledge of ignition and spark that says if a coil works
> > it works correctly all the time! Thanks to all posters who can help me
> > out.

so is the rev limiter built into the tps able to be bypassed? or can i
test the tps/adjust it? or is my only real test replace the tps and
see if that fixes it?
Thanks!


== 2 of 2 ==
Date: Fri, Mar 26 2010 4:24 am
From: "NissTech"


The rev limiter is built into the ECM logic, once the ECM see's the WOT
throttle contact has closed the ECM will engage the rev limiter to protect
the engine.


"robbie" <robbie.h.wilson@gmail.com> wrote in message
news:349e085f-c71c-43b9-afce-364dcdf7a323@b33g2000yqc.googlegroups.com...
On Mar 25, 6:41 pm, "NissTech" <mikeh...@msn.com> wrote:
> after re reading your previous posts , I think what you are experiencing
> is
> the engine going into fuel cut or rev limiter mode, this feature is built
> into ALL Nissans. the quick and easy fix is not to go to WFO (wide fucking
> open) throttle.
>
> The throttle position switch/sensor have a WOT contact so when you mat the
> thing the contact closes and the rev limiter is engaged
>
> "robbie" <robbie.h.wil...@gmail.com> wrote in message
>
> news:282bd56b-1530-4722-a76a-1be5476586e8@l25g2000yqd.googlegroups.com...
>
> >I just decided on a whim to test the ignition coil because it was
> > something i hadn't thought of looking at before.
> > the specs say the readings should be .9 ohms and 13k ohms. My readings
> > which i took multiple times were 1.6 ohms and 13k ohms. so - any
> > experts out there willing to say that this could be a potential
> > culprit? according to the (Haynes) manual - replace the coil if it is
> > out of spec. So with a higher resistance I am thinking weaker spark? =
> > poor performance? - especially when a lot of fuel is being added to
> > the fire (@WOT) ?
> > If this is the solution I will kick myself for not finding it sooner-
> > i was wholly focused on a fuel delivery/vacuum leak theory and used my
> > shade tree knowledge of ignition and spark that says if a coil works
> > it works correctly all the time! Thanks to all posters who can help me
> > out.

so is the rev limiter built into the tps able to be bypassed? or can i
test the tps/adjust it? or is my only real test replace the tps and
see if that fixes it?
Thanks!

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