The ac could be causing the problem. Turn the ac off, and watch the compressor clutch to see if it is not engaged. If it is then the compressor or clutch could be bogging the engine down.
check throttle plate builds up with carbon
You might own a Daimler-Chrysler product. Consider cleaning (the inside of) the throttle body.
You have an ignition Control Module that you can check that controls ignition timing Throttle Position Sensor that tells the computer where the throttle is so it can regulate and give the correct air fuel ratio.
If you have the 99 -02 Cougar replace the TPS (throttle positioning sensor) on the throttle body.
check the throttle body for carbon build up probably fuel related
DTC P1221 code is: Excessive Difference Between Throttle Position Sensors which means there is something wrong with the electronic throttle positioning sensor system, probably needs replaced
If your 1994 Jeep Wrangler is stalling and having difficulty starting, there could be an issue with the throttle position sensor. A damaged TPS can also cause hesitation when accelerating.
It has to be replaced. no adjustments.
High idle RPM, stalling, low mpg, poor performance.
85 THUNDERBIRD KEEPS STALLING. tHE ONLY WAY IT STAYS RUNNING IS WITH A LOT OF HELP. i MUST KEEP FEATHERING THE GAS PEDAL PUMPING IN GAS i HAVE REPLACED THE THROTTLE BODY, FUEL FILTER, DROP THE GAS TANK AND WASHED IT OUT. iDEAS?
Check your Idle Air Control Motor located under neath the Throttle Position Sensor.
Give a little more throttle and ease out slowly on the clutch. If that doesn't work you may have a timing issue.