Coleycole

I may need to try this as well. My car isn't as punchy as she used to be.

designo

iTrader: (6)

Lexus dealer here puts that **** in my car every 5000 miles.

BeerDad

Just wanted to say thanks for this thread - my GS460 started developing the same issue some months back, slowly getting worse - replaced the plugs, replaced the coilpacks, cleaned the MAF sensor, cleaned the throttle body - nothing helped - finally worked out with a scan tool the ECU was retarding ignition timing due to knock - but still didn't know why... professional mechanic recommended pulling all the direct injectors and get them tested and cleaned for $thousands - then I found this thread, and $20 worth of injector cleaner and a full tank of fuel later - it's running like it did when I first bought it again! Wish I'd found this sooner.
Anyway, thanks again - this saved me a bundle and I'm back to loving my GS460 again!
Just for anyone who finds this in the future, I couldn't get the Lexus brand injector cleaner, so I used Penrite as it seemed to have good reviews - took about 400km of driving before the issue totally cleared up so be patient. From now on I'm putting injector cleaner through the system every 5000km.

mspearl95

what kind of injector cleaner did you use?

BeerDad

I used Penrite Petrol Injector Cleaner - it's an Australian made product so not sure what its availability is outside of Australia and New Zealand. Liquid Molly also seems to get good reviews and that should be available everywhere.