93 Ford Explorer-cel on while towing

While I'm towing my check engine light will come on intermitently. There is no certain times like uphill, downhill, accelerating, etc.. I've checked vaccuum lines and all appear good. Any help???

go to an Autozone if you have one, they will pull an engine code. Go to a search engine on the internet and type in explorer engine code .... and it should pull up a bunch of different sight and one of those should tell you what it is doing. Or you can pay almost 100 and have the dealer do a diagnostic.

Ok thanx. Autozone sounds better.