acceleration then idle problem...?

[tricktunes240]

So i live in wisconsin and its starting to get cold, whether thats related to my problem or not....but anyway i will be driving home from school and lets say for some reason i accelerate hard.... .....1st , 2nd, then just put it in neutral to coast.....it will fall from wherever my rpms were at to around 200 rpms?(yes 200 not 2000) and espesially if i have my heater on 4 it will be damn near to clunking out. After the low sloutch it will rise up to 1000ish(normal idle).

Also it dosnet even have to be after hard acceleration its just when its more noticable.... and btw my normal idle is smoother then jessica simpsons clevage....

please throw in some input if you have some i got other problems to deal with lately 240 related...

thanx in advance

[holmeS13]

I've had problems with the idle not moving but it stopped after the car warmed up. Mabey the fuel pump or just a new fuel filter.