motor wants to cut out at 2000-2500 rpm.
 

hey guys. i got a 98 volvo v70 xc. i got the car in december of last year. when i got it it had a broken vacuum hose from the oil trap to the intake hose. i fixed that about a month ago. but since i fixed it the car started to act up at the 2000-2500 rpm range. i replaced the intake manifold gasket, fuel injector o-rings, and old vacuum hoses. check engine code says its the crankshaft position sensor. i took it to the shop, and the guy said that i most likely have a vaccum leak somewhere, because those sensors usualy don't go out. so i've been trying to fix it myself because the shop wants $95/hour to identify the problem. because of the problem i cant drive it on the freeway. it already broke one of the motor mounts. if anybody has any idea on whats going on please let me know. thanks