SeattleGS400

iTrader: (1)

I know that you don't do it Pete, but for those do it or are thinking of it, wouldn't it seem easier to just get the naphthalene in a bottle instead of putting cotton INSIDE your gas tank? I wouldn't put moth ***** inside my gas tank--they cant' be removed unless you open up the tank. It woud be easier to add an octane booster in a bottle, or better yet, just use premium gas (what the Lexus manual recommends).

By the way, bmgs400, since you're using octane 89, your car's computer probably retards the timing a few degrees to prevent engine knocking (and reduces performance). Thus, you'll have a delayed response in your engine. Use quality supreme gas, and see if that helps.

bmgs400

Thanks SeattleGS, we shouldn't be cheap when feeding our GS's. I filled with 94 octane last night and I was using 87 octane...cheap stuff not good. I agree when you said the timing is being retarded some to prevent engine knocking. I remember reading that somewhere before. So anyway, I also pulled the ECU-B1 fuse and replaced after 20 minutes or so. This seems to make a difference, I can't really tell today with all the rain. I'll mash it when the roads dry.

Hey croz, how's the GS now?

bmgs400

Thanks SeattleGS, we shouldn't be cheap when feeding our GS's. I filled with 94 octane last night and I was using 87 octane...cheap stuff not good. I agree when you said the timing is being retarded some to prevent engine knocking. I remember reading that somewhere before. So anyway, I also pulled the ECU-B1 fuse and replaced after 20 minutes or so. This seems to make a difference, I can't really tell today with all the rain. I'll mash it when the roads dry.

phluid

I had a problem where my GS4 would lag most of the time, mainly when the car had first been started wether I was at a stop or pushed the pedal down while going 60... my problem to out to be a fuel regulator sensor..

bmgs400

Yeah! Hesitation is gone. Using 94 octane really changed my car. Acceleration and shifting is noticably much better.