1993 mercury tracer shakes and sputters and is slow to accelerate you find you can get it going better at lower rpms so you shift early it also smells like it is flooding new fuel filter plugs O2?
It could be a sticky/dirty injector, a bad air filter, sticking EGR valve or any of a number of problems. If you suspect flooding, run some injector cleaner through the next tank of fuel. Also, check the air filter and make sure the intake is free of obstructions. If it runs well at low RPM's, it could just mean that it's not getting enough air.
The problem is that you may not always have the best prediction and you may not know exactly when and how to prepared for flooding. Also not all kinds of flooding can be predicted, only ones caused by heavy rains. So all we can do is wait until techonology is improving that can better predict flooding.
Friction can make it easier to accelerate something or harder to. More friction on the object being accelerated means it is more difficult to accelerate it. You and a friend are pushing a heavy crate down a street from a standing start. It's difficult to accelerate it. Now try the same thing on a street that is covered with ice. (The two of you have spikes on your shoes.) Better acceleration.