check engine light/ canister purge soleniod/ftp sensor on 1996 Buick Park Avenue

had check engine lite checked by auto zone. codes were p1441 , aa1.-failed canister purge solenoid/ or possible code aa2.-ftp pressure sensor. notice not getting good gas mileage as with last tank. someone said to have a smoke test done fisrt before replacing parts to make sure thiers no line leaks?have you heard of this? the supercharge was taken off yrs. back. was getting good mileage till a week ago. only has 109,000 miles. is these parts very expensive or hard to replace by a person with littel mechanic exp. ?

by in Rogers, AR on November 15, 2010
1 answer
ANSWER by on November 15, 2010
how ever took supercharger off they probley `left it off motor,i have heared about smoke test before but i never have you one, if it is a supercharged motor that you took put regular intake on the pistons are diffrent , supercharged has less compression than just stock 3.8 engine it probley dont have the power it shood have