My 98 is having ecm issues i believe. Ive got a fass on the truck, and 90% of the time you have to wait 10-15 seconds after you turn the key on before the computer turns the pump on. Hear this was a common problem on 98.5's. Is that right? Also if i find a used ecm does it have to be off a 98 or would a 99 work? Thanks.