Check the vehicle for fault codes to see if there are any sensors were involved to the malfunction of the engine.
1.Local auto parts stores such as Autozone ( not in California) or Advance Auto parts or Pep Boys will scan and retrieve any diagnostic trouble codes ( dtc ) stored in the powertrain control module for free of charge..
2. Amazon.com has the code reader for less than $ 19.79 dollars + shipping
Autel MaxiScan MS300 CAN Diagnostic Scan Tool for OBDII Vehicles
3.Re-post the dtc's in here " answer question " for further assistance.
Note: we need the dtc's to identify the sensor, there are a dozen different ELECTRONIC sensors to operate the car.
Visit this site and see all the different sensor definitions.
Powertrain Control Module (PCM)
Throttle Position (TP) sensor
Mass Air Flow (MAF) sensor
Intake Air Temperature (IAT) sensor
Idle Air Control (IAC) valve
Engine Coolant Temperature (ECT)
Heated Oxygen Sensor (HO2S)
Camshaft Position (CMP) sensor
Knock Sensor (KS)
Vehicle Speed Sensor (VSS)
Crankshaft Position (CKP) sensor