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Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
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23,889 Posts
Welcome to Allpar. Is the 'ck eng' or 'service engine soon' light on?
If so, you have a stored PCM fault code that would help give some direction to go in here. A TCM may not light an indicator saying that it has stored faults, but also may be your performance problem.
See if you can scrounge up, borrow or purchase time with an OBD I scan tool with the Chrysler engine (black 6-terminal underhood and battery (+) clip) and transaxle cable (inside gray or blue 6 or 8 terminal drivers side underdash) to help in engine or transaxle diagnosis. Otherwise, it could be either and we're just guessing. A lack of engine power or a slipping transaxle could cause this. What does the tach (if equipped) do going up a hill?
 

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Super Moderator
1966 Crown Coupe, 2016 200 S AWD, 1962 Lark Daytona V8.
Joined
·
23,889 Posts
Try to determine whether it is a lack of engine power or a transaxle slipping issue for the difficulty climbing hills. The transaxle will downshift and the engine rpm will come up when under load, on an uphill climb.
4000 rpm doesn't tell me much without knowing more about the circumstances.
This will help to choose a direction of diagnosis.
Some sensors can be way off and not set a fault code. This is where a scan tool sensor display reading would help.
Lack of power can be from plugged catalytic converters, defective O2 sensors, ign or valve timing problems, wrong sensor information, slipping clutches, etc. The list is too long without ruling out things one at a time in order to narrow the root cause down.
 
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