Can the Idle Motor Be Repaired?
2 Answers
Idle motor can be repaired. Below is the relevant information about repairing an idle motor: Idle Motor Problem Detection: Pull out or push in the core valve at the center of the motor. After installation, start the engine. If the idle speed increases or decreases, it indicates no problem. If there is a persistent high idle speed that cannot be lowered or a persistent low idle speed that cannot be raised, it suggests a fault in the idle servo motor. Idle Motor Repair: Common failures of the idle motor are mostly caused by carbon deposits and dust accumulation. Since the idle motor controls the idle air flow and is connected to the electronic throttle, it is prone to carbon deposits after some time of use, along with dust accumulation, which can affect the precise control of the idle motor. After removing the idle motor, spray carburetor cleaner. During cleaning, ensure the motor cone head is facing downward, then spray cleaner on the cone head and the carbon deposits on the sleeve part. Wipe it clean with a cloth to prevent the cleaner from entering the motor and causing damage.
I helped a friend deal with this issue recently. A faulty idle control valve usually requires replacement, but repairs are possible in specific cases. For instance, if the motor is seized, disassembling and cleaning carbon deposits can revive it. Worn bearings in older valves can also be replaced to extend their lifespan. However, removing the intake manifold is particularly labor-intensive, and the labor cost for disassembly and reassembly on a regular car often exceeds the price of a new part. Aftermarket parts now cost around a hundred bucks, making repairs less cost-effective than replacement. Post-repair, you'll still need a diagnostic tool to recalibrate the system, otherwise, the engine will continue to misfire and shake. Last time after cleaning the carbon deposits and reassembling, the RPM fluctuated wildly like a rollercoaster, so I ended up replacing the entire assembly to finally resolve the issue.
