Drivability problem.. please help asap

I second the ignition problem, especially if you found the spark gaps were too large. My 2.4L min-van would miss on hard acceleration at ~45 mph, such as getting on the freeway. I found that lowering the spark gap from factory 0.060" to 0.055" was a standard fix for Neon turbo owners. It worked for me (twice). However, I had the same symptoms in my 225 Dart when the problem was a rubber fuel line collapsing, so could be starved for fuel. Both feel the same because both make cylinders miss ignition.