Hesitation - 2009 Dodge Caliber

Sounds like your spark plugs need replaced. ( long shot answer)

check the drive shaft "U" joints and slip joint for bad wear . If you have a centre bearing check it for serviceability. pull the plug in the diff and check the magnet for metal bits.

im having the same issue. I think the problem is the tcm but after installed make sure you get clear the codes and reprogram the computer

sounds like your throttle position sensor is bad

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MOST TIME CAR STUMBLE OR HESITATION ON ACCELERATION YOU.HAVE A SLIGHT LEAN FUEL MIXTURE.CAUSED BY STOPPED UP FUEL INJECTORS OR FUEL FILTER SLIGHTLY PLUGGED.

symtoms of a bad coolant sensor: poor car idle, rich mixture, retarded timing, slow idle speed, cold hesitation or stumble, poor fuel milage, check and make sure air filter is clean. and check plugs and wires if need be,

distributor under the rotor and cap, if not the rotor and cap (or ignition pack-coil if its not cap and rotor.)

sound like throttle position sensor.have it check out.also check air duct connected to mass air flow sensor and throttle body.if air duct is loose or off.it will cause severe hesitation.

A pop and hesitation is likely a backfire. The hesitation around 40 and 50 would be in keeping with that theory. There are several reasons you might be getting backfires and hesitation. If your ECM is adjusting the engine to run too rich this could happen. Misfiring might be occuring. Timing could be out. But one of the most likely is a restricted exhaust, likely due to a plugged, damaged or worn out catalytic converter. In some cases the converter may be bad enough to be giving you some performance problems, but not yet quite bad enough to signal an error. A vacuum test can help confirm whether this is exhaust related.

If this is hesitation and unsteady idle, check for vaccum leaks at the intake with starting fluid. Frankster016