When you slow down, the trans should downshift and I believe you are feeling the shock of the gear change. The engine also revs very high when you accelerate so I believe the trans throttle cable needs an adjustment, it has been adjusted too short which would cause harsh upshifting due to high pressure.
Hesitation can be caused by faulty wires. Test their resistance, should be between 7 to 20 k ohm depending on length, longer highewr resistance. If no resistance or over 25 k ohm. The wires need replacement.
A faulty TPS, MAP or low fuel pressure would also cause the problem.
Saturday, June 14th, 2008 AT 9:32 AM