Re: [DMCForum] Possible alternator trouble and more

[mike clemens <rmclemns@xxxxxxxxx>]

Dave,

If you haven't already, check your belt.  If it is
fine, then I say put the Motorola back on.  I don't
know for sure, but the new alternator may have a
triode system and one of them may have gone bad.  That
happened on my Caviler one time and it is drivable for
a short distance, but it is not doing the battery any
good with the undercharge.

Mike    TPS     1630

PS:  USNRET


--- usndmc <usndmc@xxxxxxxxx> wrote:

> Ok everyone, get ready for a long one:
> 
> A little over a month ago I replaced my original
> 90-amp Motorola 
> with a D150 from John Hervey, just as a preventative
> step. My 
> original Motorola was still working fine, but I
> figured I would 
> upgrade it before it failed and left me stranded
> instead of after. 
> 
> Everything was working great the last month, until
> about 5 days ago, 
> I started noticing that once in a while as I would
> accelerate, 
> particularly in 1st and 2nd gear, through around
> 1500-1900 RPMs I 
> would hear a whining screeching sound like a rusty
> wheel spinning 
> that needed some lubrication kind of thing, and
> coinciding with the 
> noise the voltmeter would dip from its normal
> 13.5-14 down to about 
> 12.5 until the noise stopped. It usually only lasted
> for about 3-5 
> seconds. I tried 3 different times in the driveway
> manipulating the 
> throttle from the engine to replicate the symptom
> but could not.
> 
> Then this afternoon on my drive to work, when I was
> about 10 minutes 
> away, the voltmeter dropped down to about 11 (it was
> just a hair 
> above the red line in between 8 and 13). The noise
> from before was 
> not present, and the volts never went back up the
> rest of the drive. 
> I tried quickly having a look in the parking lot at
> work but 
> couldn't see or smell anything really out of the
> ordinary in the 
> engine bay. When I came out to drive home, the
> voltmeter was in the 
> same spot right around 11 for the entire drive home,
> and if I 
> pressed the gas down a fair bit and put a decent
> load on the engine 
> trying to accelerate it would shudder and kick and
> the tachometer 
> would go erratic, although with light acceleration I
> was able to 
> maintain any constant speed (the drive home is about
> 70 mph). 
> Usually the idle in my car is right at 750-850 all
> the time. As I 
> got a little closer to home I noticed it started
> idling right at 
> 1000. In the driveway at home I was messing around
> gunning the 
> engine a couple times and letting the idle settle
> back down and it 
> did drop from 1000 down to about 950 at one point.
> 
> I can't see anything really out of the order from
> looking. Both 
> belts are new and appear to still be fine. The
> battery light works 
> of course but never illuminated the whole time. I
> have no idea where 
> to start here. I know, the first thing I should do
> is call John 
> Hervey. I did, and he's out of town for a few days
> so no help there 
> for the time being. I'd appreciate any insights,
> tips, and advice on 
> what to do here, or even an explanation of what
> could be going on. 
> Should I grab my tools and head out tonight and put
> the Motorola 
> back in to make sure I can get to work tomorrow
> morning?? (yes the D 
> is my only car) Thanks a lot everyone for any help
> whatsoever!
> 
> Dave
> #5968
> 
> 
> 
> 



            
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