I have a '96 D1 that I just put a 4.6 GEMS engine in from a P38 and recently had an engine light code. I took in the truck for local service at my mechanic here in Arizona and had a printout that showed the engine hitting 230F at idle w/ AC on. My radiator has been re-cored by PO and I am ordering an Allisport aluminum radiator to replace it to handle the increased heat output from the 4.6L. Meanwhile, the temps here are 100+ every day and I want to monitor the temps with an old iPhone and was looking for suggestions on the best reader that some of you are using. Thanks