Lexus Gs300 2006 Acceleration Problem

[Addu]

Hi, I have a GS300 2006 with 80k miles on the clock. Recently, I have experienced acceleration problems and was advised by a Lexus dealer that the rear brake callipers had seized. I have got the problem fixed by an independent garage (JEM). This is resolved the problem to some extent but the car still does not accelerate as fast as it used to. I feel as if the car takes a while to go beyond the second gear. Any suggestions to remedy the issue? Many thanks !

[cruisermark]

hi

if you think its the gearbox not working properly then first and foremost check the level and condition of the transmission fluid.

[Addu]

Hi mate,

Thanks for your response. I just got my car serviced (last month). They would have checked the transmission fluid right??

[Hayne]

Does the car seem to accelerate normally if you manually select the gears using tiptronic? If not, then there is nowhere for the power to go except to the wheels, so it maybe engine related. Unless your torque converter is slipping (i.e. worn lockup clutches or faulty lockup solenoids). Its only a thought, but the power has to be going somewhere if the engine is working ok.

if it is engine related, maybe your fuelling system is not supplying enough pressure to the fuel rail (i.e. faulty FPR, fuel pump fault/seal leak). Also, I have had a throttle body gunked up which caused a sticking butterfly.

I once had intermittent power problems on a Volvo and it was found to be a faulty MAF. I replaced it and all was fine.

Just a few ideas to think about.

I hope you manage to find the fault ok.

Giles.