Pls Help Strange RPM meter problem

[spiff]

Hi my latio coming to 1 year ...strange problem

When I start car at cold engine, the rpm reads below 1K. WhenI engage gear and stay stationery, rpm reads 0. When I move of normally, it read around 1k only even when I rev, the rpm is unusally low .....however when I restart, the rpm reads normal.

This only happens when car is on cold start, anyone can help? I went to Tan Chong and when they plug in diagnostic, all normal an dthey told me no problem..


Siao liow pls help

[dsrio]

tell tan chong engineer test drive with you, 0 rpm during stationery is impossible lah.

[spiff]

When idle and not moving with gears on drive it reads 0..... when drive off rpm only around 1ooo and unusally low but no jerk or whatever, still like normal in driving only meter

The strange thing is only when i start fm cold engine i get this problem, when engine restarted after warm up no more this problem ....

Really really strange

When I told tan chong they saw the problem when I reached the workshop from cold start but when they restarted and test with diagnostic all normal

What a funny problem

[Toalson]

So wat did TCM say?

[clarence]

You can use a videocam to record the low rpm and show the video clip to Tan Chong Engineers.

[spiff]

I went to Tan Chong Ubi and they were helpful. I showed them the problem when cold start in the morning, drove there without switching off engine. I showed them and they saw the reading 0 rpm at idle. Told them to test on the spot and truly they could not detect any electronic problem.

Finally, they told me they ordered the meter from Japan and will take about 3 to 4 weeks to arrive. Well, I think its fair and will let them replace the crazy meter.

Such a strange problem, the technician say that it is the first case ever......ha ha strike 4D liow

I will post and update everyone on this eccentric problem after I replace the meter.

Thanks for all your inputs and I appreciate your help guys...you are great

[Gone with the wind]

After reading your post, I suspect the problem might not be the RPM meter.  How complex can a RPM meter be?  The meter is taking the data from other devices, so the one that feed the meter might be the cause of problem.

My main suspicious is the ECU.  I noticed quite number of Latios out there have different kind of problems with the ECU. 

Just my two cents of thought.  Please keep us posted after you have changed the meter, will like to know whether it solves your problem.

Cheers