i was thinking and the trouble code for the egr said something about water might be collecting near the egr making it malfunction... that might explain why the van only stalled in the rain at first
today, we had an old erg and installed it to see if it made a dif. it did, it seems it did away with the miss. so we are going to buy a new one and replace it, along with the tps...
i'll keep you updated, thanks again