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wizard4878

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wizard4878 Enthusiast

wizard4878

Posted
Posted

hoping its just an electrical issue but every so often my oil pressure gauge drops to 0 at idle, but never sets off an idiot light or message on the info screen and my voltmeter jumps between 9 and 14 volts the entire time I'm driving, but again no alarms or message.  Any one else experience this?

HondaHawkGT Senior Enthusiast

HondaHawkGT

Posted
Posted

Sounds like a grounding issue or you would be telling us about how your engine blew up. Should be as simple as taking it to the dealer so they can find the bad ground.

Jremm15 Enthusiast

Jremm15

Posted
Posted

The alternator only has a load on it in certain situations.  It does this for fuel economy, and for many other scenarios, just to name one.  So the battery voltage dropping could just be the alternator not actually charging.  I have noticed my voltage fluctuate quite a bit, anywhere from 10-14 volts. 

wizard4878 Enthusiast

wizard4878

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4 hours ago, Wayne3593 said:

Is the oil pressure dropping to zero when start/stop is activated?

when I noticed it the truck was running, that was the first thing I checked, its so quiet I have to look at the tach sometimes to be sure

wizard4878 Enthusiast

wizard4878

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16 minutes ago, Jremm15 said:

The alternator only has a load on it in certain situations.  It does this for fuel economy, and for many other scenarios, just to name one.  So the battery voltage dropping could just be the alternator not actually charging.  I have noticed my voltage fluctuate quite a bit, anywhere from 10-14 volts. 

I must not be keeping up with new tech very well,  I didn't know that the alternators were able to turn off and on,  I'm going to have to get myself caught up:D

BringTheRain403 Senior Enthusiast

BringTheRain403

Posted
Posted

They've always had voltage regulators on them. You alternator only puts out as much power as the truck needs to operate...

Sent from my Pixel 2 XL using Tapatalk

wizard4878 Enthusiast

wizard4878

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1 hour ago, BringTheRain403 said:

They've always had voltage regulators on them. You alternator only puts out as much power as the truck needs to operate...

Sent from my Pixel 2 XL using Tapatalk
 

true,  but they were not controlled by a computer, only voltage.  I rebuilt too many to count in the 90's and know how those worked,  just hadn't keep up with the changes is all.  The guage dropping to about 10 volts was something new for me to see,  I've never had one drop below 12 when the engine was running unless there was a failure

Bikeman Enthusiast

Bikeman

Posted
Posted
26 minutes ago, wizard4878 said:

true,  but they were not controlled by a computer, only voltage.  I rebuilt too many to count in the 90's and know how those worked,  just hadn't keep up with the changes is all.  The guage dropping to about 10 volts was something new for me to see,  I've never had one drop below 12 when the engine was running unless there was a failure

Man, I don't think it should drop to 10 volts. Something is wrong

 

wizard4878 Enthusiast

wizard4878

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59 minutes ago, Bikeman said:

Man, I don't think it should drop to 10 volts. Something is wrong

 

There is a larger mark between the 9 and 14, which in my mind should be 11.5,  it will drop just below that,  then eventually go back to 14. 

Wayne3593 Enthusiast

Wayne3593

Posted
Posted

Have you tried plugging a OBD reader and checking oil pressure that way? Of course, it's still under warranty as well.

Bikeman Enthusiast

Bikeman

Posted
Posted

Or check voltage at the battery with a dvom and compare to the gauge. Mine never drops below 12ish (the cluster gauge is hard to read. Even in auto stop that is driving its usually around 13-14.

wizard4878 Enthusiast

wizard4878

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Well I don't know if it's good or bad, but everything has been normal since I made the original post.  So unless it does it again I would just be "chasing a ghost" at this point...

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