Safety Warning
DIY auto repair can cause serious injury, fire, or vehicle damage. These guides are for informational purposes only. Always follow OEM torque specs, wear PPE, and consult a certified mechanic if you are unsure. You are solely responsible for your safety.
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HOMESERVICE MANUALSCHRYSLER1999LHSREPAIR AND DIAGNOSIS (SINGLE PAGE)ENGINE PERFORMANCESYSTEMENGINE CONTROLS - TESTS W/O CODES - GASOLINESYMPTOMSSURGING
1999 Chrysler LHS
Engine Controls - Tests W/O Codes - Gasoline: Symptoms: Surging
1999 Chrysler LHSSECTION Surging
Check the following:
- Check secondary ignition system.
- Check PCM power and ground circuits.
- Check engine vacuum.
- Check fuel pressure.
- Check Engine Coolant Temperature (ECT) sensor calibration.
- Check Throttle Position (TP) sensor calibration.
- Check Manifold Absolute Pressure (MAP) calibration.
- Check minimum idle airflow.
- Check oxygen sensor switching.
- Check Idle Air Control (IAC) motor operation.
- Check evaporative system.
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When to See a Mechanic
Stop DIY work and contact a certified mechanic immediately if any of the following apply:
- • You smell fuel, burning insulation, or see smoke.
- • Brakes feel soft, pull hard to one side, or make grinding noises.
- • The engine overheats, stalls repeatedly, or misfires under load.
- • You are missing required tools, torque specs, or safe lifting equipment.
- • You are not confident in the next step or safety outcome.