i got a 94 integra RS and i was having a problem with my LS motor, that sometimes ill drive it then ill go some where then when i turn it on then it will turn off, when i try starting it up right away it wont start i have to wait a couple of minutes and it will start up, but now i have swapped in my LS/VTEC motor, and it is doing the samething, i changed my gas filter, would it be the fuel pump? please any info would be great