I have a 2000 Civic with a B18C5, everything was running smoothly as i was driving down the highway when I started to feel the engine start to struggle. Then when I got off the highway i turned right and put it in second and when i gave it gas it the rpms would go up then down then up and down as i accelerated. (think of it as when u first started to drive stick how the car jerks back and forth) A friend told me it was going to be my puny fuel pump so i changed it for a Walbro and i can still feel it. The car even died on me at a stop light! I know its not the clutch because it's a performance clutch and i haven't driven it hard at all EVER. Help!