Please i need someone to enlighten me on this issue i have with my sienna 2001 MODEL. recently, i started noticing that whenever i drive for like a distance, the movement of the car changes, i feel on the pedal like the front tires are grinding on the tar. although one of the shaft rubber has torn and probably there is no grease. could that be the reason or the fuel pump is given sign of failure cos i am a petty fuel buyer.

secondly, i changed the front and upper engine sit recently and my car has started vibrating mostly when it is engaged meanwhile, it was not doing that even when the engine sit were completely bad. someone told me that the reason it was not vibrating was because the engine was resting on iron.

please anybody that has knowledge about these should let me know the cause and the probable solution.

I doubt if mutimusho kazeemnawa who designed that car will even be able to help you, cause your description has sent me to hospital, but i would advice you first find a mechanic near you, let him give you his opinion then look for another one far away and collect his opinion, dissect the opinion, then differentiate the opinion and finally, find the logarithm relationship between both opinion.

Its not always good to run your fuel tank low as our petrol is dirty and will send particles to the fuel pump
Also running low tank wont allow cool petrol circulate well through the system
shake your engine with both hands, if the engine vibrates or moves (you will know by metal clinging or movement) then the replaced engine seats aren't attached well or defective.
start from finding competent mechanic to do a real diagnosis then bring his solution here lets see whether it tallies.

Which of the pedals? both?...or just the throttle pedal?

Mojibola:
Which of the pedals? both?...or just the throttle pedal?

the throttle pedal