do rusty's test as outlined.......report back.
someone else suggested replacing the fuel filter, great advice.....
magnum dart suggested an exhaust restriction and how to check it, another good idea.....
do these three and then tell us the results..........all these could cause a drivability problem as your saying......
once these are eliminated, then we could go on to something else.......one of these could easily solve the problem....
higgs
