The EGR Valve can malfunction causing a hesitation when accelerating, rough idle, or idle hunting (surging or idle going up-and-down). If the valve malfunctions, there may or may not be a Check Engine light.
1994 Nissan Sentra Problem Reports
Newest 1994 Nissan Sentra Problem Reports
Excessive timing chain noise, a rattling or ticking, on higher mileage cars may lead to timing chain failure, which can cause engine damage. There are upgraded chain tension guides with a steel backing to improve durability and a modified repair procedure no longer requires the removal of the cylinder head to replace the timing chain. Maintaining proper engine oil level and frequent oil changes are important to ensure the long-term durability of this engine.