Question about 2001 Hyundai Elantra
Sorry to say that without actually looking/diagnosing your vehicle, there cannot be a DEFINITE answer. You mention 'back and forth to the mechanics'??.... Have you had work/repair service performed on the vehicle? If so, what, specifically, was done (parts replaced, diagnostic trouble codes, road/drive test results? Did the mechanics recommend anything? I need some maintenance/diagnostic history here before I can begin to provide any help/assistance.
The drivability issue you describe could be caused by 'MULTIPLE' conditions, and each one needs to be individually checked/inspected/examined in order to complete a proper & complete diagnosis...there may be more than one cause.
Throttle Position Sensor problem(s)
Fuel Quality problem(s)
Ignition (wires, plugs, coils, electrical connectors/connections)
Clogged catalytic converter (restricted exhaust)
Vacuum leak(s) - (hoses, intake manifold, exhaust manifold, O2 sensor (s)
Electrical Issues (ECM/PCM, Grounds, Faulty Relay(s), wiring harnes(s) & connector connections (pins), etc.
Advice: Have the problem properly diagnosed by a qualified/certified technician. That way you'll find out precisely/exactly where the problem(s) is/are and what it will cost/take to FIX it.
Posted on Mar 26, 2011
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Posted on Jan 02, 2017
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