Strange Tachometer Issue

[Jukelemon]

Hi all.

On the way home today, I noticed that at IDLE my tach showed 0 rpms BUT if I revved it up it registered as normal-or at least it moved like it was normal. Idle is perfectly fine i.e. smooth/right around 750-800 rpm

Thought?

Is the tach electronic or mechanical?

Thanks

 

[Jukelemon]

OK just searched and found that the tach is electronic.

So, why 0 at idle all of a sudden???

 

[2ndGenToyotaFan]

That's bizarre... Does it operate normally, but 750-800 under what it should be all the time? Or when you hit the gas it jumps up to normal?

Either way..... weird. It gets its signal from the coil...... My guess is something's up in the tach its self, cause the coil's sending a signal if your truck is running.....

 

[Jukelemon]

That's bizarre... Does it operate normally, but 750-800 under what it should be all the time? Or when you hit the gas it jumps up to normal?

Either way..... weird. It gets its signal from the coil...... My guess is something's up in the tach its self, cause the coil's sending a signal if your truck is running.....

Yeah, weird. It is not 800 under-I feel I know the sound of the engine at the shift points and when I look it is where it should be i.e. right before 4k rpm's.

I would have to agree it is the tachometer. The connection are solid at the igniter and the tach works when I hit the gas-regardless if I am in gear or not.

Oh well. I can live with it.

 

[Jukelemon]

Update..

After a day or so, tach went back to normal.

Really odd.

Operates perfectly now.

 

[WristPin]

yeah. its odd.

i just took apart my dash. the tach came out too.
it is quite a marvel.
one strand wires, opposing coils...

 

[aircrew]

My Hilux did that the other day... Went back to normal as well. I have a 3L diesel...

 

[WristPin]

mine did this today too, turned out one of my gerbils in the tires was out of water, so i fed him and gave him fresh water. now were back up to full operating temperature pulling two gerbil power

 

[2ndGenToyotaFan]

mine did this today too, turned out one of my gerbils in the tires was out of water, so i fed him and gave him fresh water. now were back up to full operating temperature pulling two gerbil power

Is that for extra power, or just to balance the tires...... Hehehe

 

[missouriman]

or do you just hide your gerbils there and tell everyone you drove through some mud...

 

[Jukelemon]

or are you friends with Richard Gere LOL!!!!!!