so im workin on this indy 500 and its starting to frustrate me. its got a 500 l/c engine i rebuilt like 2 years ago and its got good compression. it runs great but then it will just bog out to a stop when its at idle. its idleing at 2000 rpm. i sprayed carb cleaner at the crank seal and it was didnt rev up rhe carbs are clean. would a fuel pump just die out cuz thats what it sounds like is going on?