I have an 87 4runner with a 22re and a 5speed. When I come to a stop my engine begins to lug, almost like it's trying to catch it's breath then revs back to normal...the lugs only last a second or 2 and it i just barely rest my foot on the gas they do not happen at all. I'm thinking my fuel filter may need replacing or the egr valve...anyone have any ideas/opinions?