Remap = expect minor problems sorry to say.
A remap wont cause new problems,but it will show up weak parts or bring to light all underlaying issues.
Silly things like, coil packs, MAF, control valves, boost pipes, vac lines, breather pipes etc could be fine prior to the remap but as soon as your try to put a bit more power past them they could so up as a faulty item.
Nick