Today i am feeling like my vitz is vibrating while driving bumper to bumper. And feel like brake are getting hard. Brake are not braking the car smoothly also i feel earlier when i was pushing the brake long it become soft and auto push in more. but now it is not doing like this. i feel like something is holding my car.. what things i should check? i recently get it tunning service from toyota dealers.
I will drive car again tommorow dont know its because i am tried or car is doing like this.
Most probably your idle speed is dropping causing vibration. Check idle speed.
If idle is ok, check leaking brake booster or booster vacuum hose.
btw you meant traffic jam by "bumper to bumper"...?
Try getting your gear oil changed.
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if your vitz is 1000cc then you have to live with the problem else use 30:70 hi octane :petrol it will resolve your problem upto some extend
Is tuning really necessary for these cars ??
Minor vibrations are a norm in these cars, helps save on fuel.
Dunno about your breaks though