i have a 92 astro van awd with the cmfi4.3l and i just changed the motor but the motor i put in it originally had the tbi on itbut i wanted to keepthe cmfi on itbut its not workinand i was wondering if i had to swap the computer for the tbi to work or if it would work if i just swaped out the wiring harness's? please help i'm 3 weeks and 2 grand into this project and i need to get it runnin