what causes my T100 to die after going down the road.

What is your question?

I have replaced the MAFS and the TPS to no avail. I can start up my 93 T100 and it idles fine, after it warms up I put it in drive and drive it down the road then it just die like I turn the key off. I have replaced the fuel filter, which helped a little but it still die just a short distance after you start down the road.

What makes this problem better or worse?

Its a little worse when cold

How long has your 1993 Toyota T100 had this problem?

a few months