I have a 2000 gti. it has been running great, but suddenly would not go above 40mph, which it hits at about 2/3 throttle. above that it will not continue to accelerate, and makes a whooshing sound like there is air in the intake. this happened once before, and there was a bag stuck in the intake, but i have checked and there is nothing in there. Changed plugs, checked fuel filter, checked compression, starts immediately, even on one cylinder. Was kind of low on oil, but not completely empty, maybe 1" level--filled half way but still no improvement. Impeller is original, but the change was so sudden, i don't think that is the problem. Thanks for any ideas and help.


