Changing fuel will not cure the problem, EGR fault will not cause the problem it well may need cleaning out, faulty injectors could quite well cause the problem but the car needs to plugged into see what faults are recorded in the ecu.

We cannot hear the problem on the forum but a rattle during acceleration could be caused by numerous problems it could even be big end knock or a faulty valve.

Hi, you need some running data from the engine, when toyota plug in, they need to look at data and not fault codes and need to check the running values of the injectors, they have a tolerance, and if the injectors are out of spec, they will need replacing and coding to the car, you can NOT simply replace plug an play, although the engine will run.

Email for anymore details: codeman@tiscali.co.uk where are you located ?

dealership techy