EGR valve, common on the 4clangers.. cheap fix? try this:

TEST: pull the line off and block the vacuum... then drive the vehicle

FIX: take a BB (yes like a BB gun) put it inside the vacuum fitting to EGR and press the vacuum line back on the EGR.. the BB is to large to fall into EGR and to Large to get sucked into engine..

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1999 MAZDA 2500SE, 2.5L 4-clanger, 5 speed, Green n slow. Rangers as daily drivers since 1988.
ASE Certified Mechanic, Builder of Show Destroying Protouring and Classic cars..