The EV1 Portugal coastal route is fiction. There are a few signs heading west from Faro, but some of it on steep unsealed roads very dangerous using touring bikes with panniers, suitable for mountain bike only.
On the west coast the supposed route goes through sand dunes and steps – it is impossible even on a motorbike, it is strictly hiking only. Do not attempt it. On day 4 north of Aljezur we abandoned the ‘official’ route and re-planned the remainder.
The inland EV1 may well be a reasonable option, but we didn’t cycle it at all.