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is this an Alternator problem on my Isuzu?

  
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ruez46

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Since: Dec 14, 2004
Posts: 12



(Msg. 1) Posted: Mon Dec 13, 2004 10:40 pm
Post subject: is this an Alternator problem on my Isuzu?
Archived from groups: alt>autos>isuzu (more info?)
Hi there, here's my situtation, not too long ago i noticed that when i would
start my 1992 isuzu pickup it would stall a second after i started it, then
on the second attempt it would stay lit, but on my dash with all the gauges
most of the lights would be lit-up, my heater and fan would not work as well
and the washer blades were ultra slow, after giving the truck a really good
REV to 3600rpm it would kick out of this mode and run completely normal, as
i loked into this problem i looked under the hood and took a volt meter to
the battery when the truck was turned off....to my surprise it was a normal
12.9V....i checked a few other area for voltage on the engine and same 12.9V
appeared (including the Alt.) my next test was to start the engine and
voltmeter it again, after starting the engine...there was no change in
Voltage...the same 12.9V.....that is until i gave the engine a good REV
again.....then it kicked the Voltage up to 14.3V in its normal state.....i
had the Alternator re-built since i thought maybe it was an issue with the
diode-trio in the rectifier....$150 later i find the Truck is still doing
the same thing. Has anyone have input on this issue? i'm getting to the
point of pulling my hair....the funny thing is i have another 1990 isuzu
pickup thats doing the exact same thing but started awhile earlier...maybe i
can kill 2 birds wiht one stone?!

Appreciate your time folks.

Thanks

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News3

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Since: Sep 11, 2003
Posts: 7



(Msg. 2) Posted: Tue Dec 14, 2004 3:40 pm
Post subject: Re: is this an Alternator problem on my Isuzu? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
Is it fuel injected?

Steve

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ruez46

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Since: Dec 14, 2004
Posts: 12



(Msg. 3) Posted: Tue Dec 14, 2004 6:40 pm
Post subject: Re: is this an Alternator problem on my Isuzu? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
yes, its a 2.6 4 cyl. fuel injected.


"News" <swconn.TakeThisOut@cox.net> wrote in message
news:IuHvd.5776$sf5.4182@lakeread05...
 > Is it fuel injected?
 >
 > Steve
 ><!-- ~MESSAGE_AFTER~ -->
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user1432

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Since: Dec 12, 2004
Posts: 2



(Msg. 4) Posted: Sat Dec 18, 2004 7:40 am
Post subject: Re: is this an Alternator problem on my Isuzu? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
This ones easy, it is the voltage regulator which is part of the alternator.
Effectively the alternator is not electrically connected to the electrics
untils the engine is running and the alternator is generating a high enough
voltage. When you rev it the voltage goes up the alternaters regulator
connects it to the electric, your measure the voltage go up and all the dash
lights go out. My wifes 3.1TD trooper does this fairly often. No big
problem, but it may be time to get a recon alternator


"ruez46" <ruez46 DeleteThis @midnight.com> wrote in message
news:1Lsvd.481857$Pl.67355@pd7tw1no...
 > Hi there, here's my situtation, not too long ago i noticed that when i
 > would start my 1992 isuzu pickup it would stall a second after i started
 > it, then on the second attempt it would stay lit, but on my dash with all
 > the gauges most of the lights would be lit-up, my heater and fan would not
 > work as well and the washer blades were ultra slow, after giving the truck
 > a really good REV to 3600rpm it would kick out of this mode and run
 > completely normal, as i loked into this problem i looked under the hood
 > and took a volt meter to the battery when the truck was turned off....to
 > my surprise it was a normal 12.9V....i checked a few other area for
 > voltage on the engine and same 12.9V appeared (including the Alt.) my next
 > test was to start the engine and voltmeter it again, after starting the
 > engine...there was no change in Voltage...the same 12.9V.....that is until
 > i gave the engine a good REV again.....then it kicked the Voltage up to
 > 14.3V in its normal state.....i had the Alternator re-built since i
 > thought maybe it was an issue with the diode-trio in the rectifier....$150
 > later i find the Truck is still doing the same thing. Has anyone have
 > input on this issue? i'm getting to the point of pulling my hair....the
 > funny thing is i have another 1990 isuzu pickup thats doing the exact same
 > thing but started awhile earlier...maybe i can kill 2 birds wiht one
 > stone?!
 >
 > Appreciate your time folks.
 >
 > Thanks
 ><!-- ~MESSAGE_AFTER~ -->
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Erik-Jan Geniets

External


Since: Jul 30, 2003
Posts: 127



(Msg. 5) Posted: Sat Dec 18, 2004 12:40 pm
Post subject: Re: is this an Alternator problem on my Isuzu? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
ruez46 wrote:
 >
 > Hi there, here's my situtation, not too long ago i noticed that when i would
 > start my 1992 isuzu pickup it would stall a second after i started it, then
 > on the second attempt it would stay lit, but on my dash with all the gauges
 > most of the lights would be lit-up, my heater and fan would not work as well
 > and the washer blades were ultra slow, after giving the truck a really good
 > REV to 3600rpm it would kick out of this mode and run completely normal, as
 > i loked into this problem i looked under the hood and took a volt meter to
 > the battery when the truck was turned off....to my surprise it was a normal
 > 12.9V....i checked a few other area for voltage on the engine and same 12.9V
 > appeared (including the Alt.) my next test was to start the engine and
 > voltmeter it again, after starting the engine...there was no change in
 > Voltage...the same 12.9V.....that is until i gave the engine a good REV
 > again.....then it kicked the Voltage up to 14.3V in its normal state.....i
 > had the Alternator re-built since i thought maybe it was an issue with the
 > diode-trio in the rectifier....$150 later i find the Truck is still doing
 > the same thing. Has anyone have input on this issue? i'm getting to the
 > point of pulling my hair....the funny thing is i have another 1990 isuzu
 > pickup thats doing the exact same thing but started awhile earlier...maybe i
 > can kill 2 birds wiht one stone?!
 >
 > Appreciate your time folks.
 >
 > Thanks

Both my Diesel Isuzu's do this. Even after replacing alternators or
regulaters.
I think I just belongs that way. Doesn't gave any problems.
Just the nature of the car.
Kind regards,
Erik-Jan.


--

<a style='text-decoration: underline;' href="http://www.fotograaf.com/trooper" target="_blank">http://www.fotograaf.com/trooper</a><!-- ~MESSAGE_AFTER~ -->
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hlittau

External


Since: Dec 19, 2004
Posts: 1



(Msg. 6) Posted: Sat Dec 18, 2004 10:40 pm
Post subject: Re: is this an Alternator problem on my Isuzu? [Login to view extended thread Info.]
Archived from groups: per prev. post (more info?)
 >Both my Diesel Isuzu's do this. Even after replacing alternators or
 >regulaters.
 >I think I just belongs that way. Doesn't gave any problems.
 >Just the nature of the car.
 >Kind regards,
 >Erik-Jan.

My 1988 Impulse did something very similar last week.
Several indicators including battery condition lit up (I should say
they stayed lit after startup)
The blower motor, compressor and vent controls were all inoperative.
When I selected the highest blower speed I heard loud relay chattering
from under the hood. If I turned the blower speed to "Off" all lights
and noise would go out.

It turned out to be the "X2" RELAY as shown in the manual. It was
stuck in the released position. As I understand it, the vehicle has
things that are useable with the key on, yet other things that are
only supposed to work when the engine is running. This relay seems to
be what re-routes power between these modes based on output from the
alternator driving this relay's coil exclusively. It was stuck in the
"engine not running" position.

A very alarming symptom set-I as most people would have absolutely had
a cow if I didn't have a general feel for how some stuff works.

Another way to describe it is from history:
" We have a Bus B undervolt, multiple caution and warnings and a loud
noise associated with the caution and warnings"<!-- ~MESSAGE_AFTER~ -->
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