kmb4701 Posted December 3, 2006 Share Posted December 3, 2006 I've searched the forum and for this problem and found it to be informative. My situation however is just a tad bit different. I added a bottle of octane booster to my tank. It claimed to be "barely street legal" which was much stronger than what I usually use if I don't get premium. Shortly after I began to notice the sputtering between 45 and 55 mph. I can accelerate just fine but whenever I start to cruise here comes the sputtering. Question: Since I added the octane booster what, to you guys knowledge would be the problem? I've had my egr valve cleaned and pcv valve replaced. I changed my oil with a toyota filter 3 weeks ago. As of yesterday I just filled up with regular premium and a fuel system cleaner. I noticed that the problem got a little better but still noticeable. Should I just continue to ride for a while until this is processed out of the fuel system, or just let a mechanic take a look. Thanx Keven Quote Link to comment Share on other sites More sharing options...
Tsquared Posted December 3, 2006 Share Posted December 3, 2006 You may also want to change the fuel filter. Run the current tank through it down to empty, then put in 4 galons of regular and run that out. If that has not cleared everything up then go for a tune-up with another new fuel filter, new plugs, egr, and claening the throttle body, IAC, and any other intake/vacume hoses. Next step would be professional injector cleaner. I add Lucas or BG injector cleaner every 5K alternating between them. I do not vary from these two. I have heard of good results with the Chevron cleaner as well. I also run the lowest octane that does not ping. For my wife's ES 330 we are running 87 octane, my daughter Volovo 850 is also running 87, my F150 needs a little more so I run 89 octane, and in the 944Turbo I put a bottle of booster in with 91 octane to get it up to 93/94 octane (it is not close to being stock and needs the extra octane to prevent detonation). Additives can be a good thing but they can also screw things up. I have used SeaFoam with fair results but I have also seen this break all kinds of gunk loose on a car that had little preventitive maintence other than oil changes and it caused all kinds of problems. Quote Link to comment Share on other sites More sharing options...
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