funlovinkid

If you think those idiots at Toyota dealers know what they are doing hear this. My friend bought his wife a new Altis late last year. After a couple of months he decided to drive it. Brake pedal nearly going to the floor. He told her to take it back and have it fixed. They said,as we expected,nothing wrong. That's normal.
He told her to take it back again. Same story. Next time he went and got a bit heated with them. He said quite clearly that there was air in the system,at the very least. They bled the brakes. OK for a few days then the same again. We diagnosed it as a faulty master cylinder confirmed by a trusted mechanic acquaintance. Took it back demanding a new master cylinder quoting our mechanic friends diagnosis. Reluctantly they did. The moral of the story is that unfortunately you have to know more than they do which with most of the Somchai's is not much,otherwise you are left driving a dangerously faulty car which the average Thai will think is normal.
And a bit of googling turned up a recall somewhere in the world for the same model with the same fault. Of course it can and is covered up here! Must save face if not lives.

Octane rating for Vios is 93, there for 95 will get ride of that knock. gasohol 91 should also clear it up but as you state its hard to find up north, ill would go the 95. do what i did, slap a LPG converter in there.

hansnl, on 2012-03-19 17:52:22, said:

Yep a new car should not be knocking on nearly any available fuel but most especially not on a benzine fuel, there's a problem and of course they don't mind passing it off as it will probably last well through your warrantee without showing it's teeth but then................................................... It's your baby..

Sounds like an ECU (on board computer) problem. The ride must be connected to a Toyota Main Agent computer which will diagnose the problem.

Knocking (pinging) of petrol engines.
Controlled by knocking sensor
Possible reasons of knocking:
- Ignition
- Wastegate
- Cooling system
The ECU should be able to control the knocking to a value where knocking by high or low rpm is optemised by manupilating the ignition or wastegate.
The cooling system might give troubles uncontrollable by the ECU.

Probable reason
ECU or ECU connector problem;
Knocking sensor;
Wastegate;
Cooling system.

Try to require your dealer to connect the ECU to the computer any Toyota dealer should have.
Read in the correct values.
If well programmed, the ECU should be able to cope with all the different fuels available in Thailand
Sometimes oil on the connectors of the ECU can be the problem.
Cleaning the things might help, if not a new cable should be installed free of charge
The result reading of the ECY should indicate incoming or executing faults from the wastegate, knocking sensor and possibly the cooling system.

If they do not want to do this, call Toyota Thailand.
Explain the problem, and ask them to help you.
Their knowledge of English is sufficient to handle your complaints and solve them.

(Info: chief mechanic Autohuis the Netherlands)