Hello there, my little van is having an issue where it will sit at about 1300 rpm and not go down. Now before I had this issue it would start at 1300, and over the course of about 5-7 minutes would "warm up" to about a smooth 900-1000 rpm. Any guess as to what it could be, and if I need to replace something what would it be? I'm currently looking for Throttle Bodies, Gaskets, and Sensors that might resolve my problem, and any info on what and where I should look for would be of tremendous help. So far as I know, my van is a late '91 model which if Wikipedia is anything to go by says I have a SOHC 6 Valve Turbo, model EF-TS. Thank you.