Waleed

On 6/8/2021 at 1:18 PM, johnatg said:

Hi Waleed

I'd find it really hard to diagnose your problem from here. Maybe you have a hole in the exhaust - perhaps the pipe in front of one of the silencers. Does the car feel smooth when you drive or is it missing? It could be a semi-blocked fuel injector or a failing plug coil. Do you run on premium petrol? Try a tankful or two of Shell V-Power. That's all I can suggest really. An actual engine problem is unlikely if the car has been properly maintained - oil changes etc. I wouldn't start changing things on spec - you need to find out what is actually causing the noise, even if that means spending money at a Lexus dealer.

I have no idea about Lexus indies near London - I'm in Cheshire and rarely visit the smoke and certainly not to get any kind of Lexus service/repair.

The car does drive smoothly, but i feel it's a little down on power(maybe that's because i'm coming from a v8 bmw). However it gives the usual kick in the back when i lift my foot completely off the throttle mid acceleration and the car shifts into the next gear and drops the rpm(However I think that's just how the gearbox is setup). I have run Shell V-Power since I picked it up (90k miles). The sound definitely originates from the backside of the engine. I have it booked in for next week for TechOne to have a look and diagnose it. 

Surprisingly the Car was bought at Lexus Cheshire and was maintained there till about 70k miles. After that it's got a bit of a dodgy service history(different independants and at weird intervals) till about 90k. 

I've got a lexus gs250 with 95000 miles on the clock. Recently I've noticed the engine rattles when I accelerate. It sort of sounds like a diesel. It usually happens between 1000-3000 rpms. Sound like this (https://www.youtube.com/watch?v=FmbynU-YW2k#t=134) under load. After doing some research online, turns out it is an uncommon issue with is250s & 4GR FSE's (https://www.clublexus.com/forums/is-2nd-gen-2006-2013/762822-is250-making-diesel-like-noise.html). I did set aside a sum for surprises like these. I'd like some suggestions for an independent Lexus specialist around London that could change out the Timing change tensioner. And if anybody else has experienced a similar issue?