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Originally Posted by mystake
had tranny rebuilt then had to replace timing belt and pulleys not cheap 3 pulleys and belt now will run idle then motor will dieafter 40 minutes at idle then wont restart till it cools off ran a eec4 scan got codes 17,21,23,27,68 any help ????? was told it could crankshaft position sensor 
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I would replace the CPS as they do get heat sensitive or oil soaked. The codes you have are strange. I would clear those codes and see if they come back again after replacing the CPS.
Code 17 Idle RPM Low With ISC Retracted (1.9L & 2.5L CFI)
Code 21 Engine Coolant Temperature (ECT) Sensor Out Of Self Test Range
Code 23 Throttle Position Sensor Out Of Self Test Range
Code 27 Vehicle Speed Sensor (2.3L Turbo)
Code 68 Idle Tracking Switch Closed (1.9L, 2.3L, 2.5L & 3.8L CFI)