2.9 ranger runs bad ufter warm up no power at all can hear popping in exhaust

1987 FORD TRUCK
150,000 MILES
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MARSHALL1959
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did complete tune up accept fuel filter have egr codes 33-84 also valve tap dont want to tear motor down to fix that till i fix running problems checked timing ok. any ideas whats wrong?
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Apr 6, 2012 at 11:55 AM
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HMAC300
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if you ae getting a code 33 that means your egr is bad an dneeds replacing or it's clogged up or thepassageway is clogged. It may be the reason for the popping in exaust as well. it cold also be a vacuum leak to the egr valve with a split or broken vacuum line.tis can also be an iginition problem i'm sending a vacuum diagram for yuo to check against yours.
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Apr 6, 2012 at 8:45 PM