Ok, I've had my 97 Prelude now for a lil over 3 years. Recently (within the past month or so) I've noticed the motor was running kinda rough. I dump 2 STP Fuel system cleaners in it and the motor runs fine. Then the tank runs out so I fill it up and it pulls the same rough running shit. So I dump 2 more STP Fuel system cleaners in it. Once again the motor is running fine. I also notice when I don't have the fuel system cleaners and I let the car idle for 10-15 min or so and then rev a lil I get the lovely unburnt fuel cloud coming from the tail, very briefly though. It's definitely not oil blow by or any of that shit, I know the difference in smell and color.
Whatcha guys think? Air/Fuel problem?
Timing?
I know the fuel system cleaners don't really do a shitload more than raise the octane rating slightly. Thats why I'm kinda leaning more towards air/fuel mixture or maybe the gas station I usually go to has shitty gas atm? I don't know, hit me with some ideas :thumb: