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Today's topics:
* 91 Nissan Sentra 1.6 4speed manual instrument panel/dash panel lights out- -
2 messages, 2 authors
http://groups.google.com/group/alt.autos.nissan/t/fa71669d9b5060c5?hl=en
* Sentra 97 AFM or fuel pump? (or maybe something else) - 2 messages, 1 author
http://groups.google.com/group/alt.autos.nissan/t/dd7dae047a0c4c8c?hl=en
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TOPIC: 91 Nissan Sentra 1.6 4speed manual instrument panel/dash panel lights
out-
http://groups.google.com/group/alt.autos.nissan/t/fa71669d9b5060c5?hl=en
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== 1 of 2 ==
Date: Tues, Feb 1 2011 6:31 pm
From: "NissTech"
So elaborate a little when you say you "checked" the dimmer control.
What were your findings ?
How did you "check the dimmer?
Did you jump/bypass the dimmer , if so what were your findings.
The dimmer control has 3 wires coming in .
power
ground
and output to the dash lights
"robbie" <robbie.h.wilson@gmail.com> wrote in message
news:83761b13-6040-4f85-93a6-28bf06c2a032@y12g2000prf.googlegroups.com...
>I want to get these repaired b/c I hate not being able to see my
> gauges at night- I took the panel out several years ago to replace
> bulbs but they were all working and now they are not. I can always rig
> them but hopefully someone has some experience they can lend so I can
> repair them properly. I checked the dimmer knob associated with the
> instrument panel. I also have my parking/tail lights working when the
> parking lights are turned on. Thanks to anyone with any pointers!
== 2 of 2 ==
Date: Wed, Feb 2 2011 7:33 am
From: robbie
On Feb 1, 9:31 pm, "NissTech" <mikeh...@msn.com> wrote:
> So elaborate a little when you say you "checked" the dimmer control.
>
> What were your findings ?
>
> How did you "check the dimmer?
>
> Did you jump/bypass the dimmer , if so what were your findings.
>
> The dimmer control has 3 wires coming in .
>
> power
>
> ground
>
> and output to the dash lights
>
> "robbie" <robbie.h.wil...@gmail.com> wrote in message
>
> news:83761b13-6040-4f85-93a6-28bf06c2a032@y12g2000prf.googlegroups.com...
>
> >I want to get these repaired b/c I hate not being able to see my
> > gauges at night- I took the panel out several years ago to replace
> > bulbs but they were all working and now they are not. I can always rig
> > them but hopefully someone has some experience they can lend so I can
> > repair them properly. I checked the dimmer knob associated with the
> > instrument panel. I also have my parking/tail lights working when the
> > parking lights are turned on. Thanks to anyone with any pointers!
That was a while ago so I guess I should start the diagnostic process
again with the dimmer control. Cannot remember exactly what I did with
the dimmer. I will repost with the results.
Thanks!
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TOPIC: Sentra 97 AFM or fuel pump? (or maybe something else)
http://groups.google.com/group/alt.autos.nissan/t/dd7dae047a0c4c8c?hl=en
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== 1 of 2 ==
Date: Wed, Feb 2 2011 3:26 pm
From: Me
Symptoms - seems like fuel starvation under load. Idles smoothly, and
runs fine under low/normal load, but cuts out up hills etc. No CEL. No
black smoke - it just dies.
Have replaced filter as first step.
Used parts supplier has a bin full of used pumps for about US$60 each,
and doesn't sell many or hear of many failures, so he suggests that it's
the AFM rather than the pump or relay etc. He could be right, but it
doesn't seem like the AFM to me, as it's running very well/smoothly
under low load, not hesitating etc on acceleration etc and only starts
cutting out when it's been under load for 10 seconds or so.
I also checked MAF signal voltage, and that's looking okay (I think), at
warm idle, it's steady at around 1.4v, signal voltage increases and
falls smoothly, it's steady at about 2.5v @ 3,000 rpm. But, I also hear
that the AFM unit failures are related to internal dry solder joints, so
it might test okay but fail on road test.
On the other hand, the pump also seems to be operating as normal, can
hear it when the ignition turned on, and it's cutting out after about 5
seconds. (not sure if that initial 5 second run is just based on a timer
circuit though - the fact that it cuts out "as normal" might be
meaningless wrt fuel pressure)
I don't have a fuel pressure gauge, but the fuel hoses feel much softer
at idle than I'd have expected if they were at about 34psi (FSM spec).
Any suggestions appreciated for "next step"?
Should I go out and buy a fuel pressure gauge, or perhaps set up some
long leads for multimeter probe to see if I get some strange readings
from the AFM when it's on a test-drive?
== 2 of 2 ==
Date: Wed, Feb 2 2011 4:32 pm
From: Me
On 3/02/2011 12:26 p.m., Me wrote:
> I also checked MAF signal voltage, and that's looking okay (I think), at
> warm idle, it's steady at around 1.4v, signal voltage increases and
> falls smoothly, it's steady at about 2.5v @ 3,000 rpm.
Found spec in FSM (GA16DE):
1.0 - 1.7v at idle (in "N", no load)
1.8 - 2.4v @ 2,500rpm (in "N" no load)
Rechecked, unless it's an intermittent "dry solder" problem with AFM the
AFM is within spec.
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