What causes the Wuling Rongguang's idle speed to stay at 2000 RPM and not drop?
4 Answers
Wuling Rongguang's idle speed staying at 2000 RPM and not dropping can be caused by normal conditions or other reasons such as an oversized idle jet. Specific explanations are as follows: Normal phenomenon: High idle speed during cold starts is normal. The engine requires higher RPM to quickly reach optimal operating conditions and needs a richer air-fuel mixture, which increases air intake and fuel injection, resulting in higher RPM. Other reasons: Oversized idle jet; loose throttle shaft; poor performance in individual cylinders; intake manifold leaks due to improper fixation; brake vacuum booster air valve leaks or other vacuum pipe leaks; distributor contact gap too small; excessive carbon buildup, etc.
My Wuling Rongguang also had a similar issue before. The idle speed stayed stubbornly at 2000 RPM and wouldn't drop, causing terrible fuel consumption and loud noise. At first I thought it was due to a dirty throttle body getting stuck, but cleaning it didn't help. Later I found out the idle air control valve was faulty - replacing it fixed the problem. An aging throttle cable can also get stuck, causing abnormally high RPM. Additionally, faults in the electronic control system or incorrect sensor signals might make the ECU raise the idle speed. Driving like this for long could lead to engine overheating and piston ring damage, which would cost much more to repair. So I suggest you visit a repair shop ASAP to diagnose the root cause.
I usually enjoy tinkering with my car, and when encountering idle issues, I start by checking the simple things first. For example, see if the throttle pedal or cable is stuck, and try loosening it. Then inspect the idle air control valve—if it's clogged with carbon deposits, it can easily fail, causing the RPM to stabilize at 2000. Also, if there's a vacuum leak, excess air intake can raise the RPM. On the electronic side, a faulty throttle position sensor is common—just measure the voltage with a multimeter to check. Don’t delay too long; high idle consumes fuel and damages the engine. Safety first.
I've been driving a Wuling for years, and it's quite common for the idle speed to stay at 2000 RPM without dropping. It's mostly caused by issues with the idle control valve or throttle body leading to uncontrolled RPM. It could also be an ECU fault in the engine computer, where signal disruptions cause the idle speed to rise. If a simple throttle body cleaning doesn't work, you'll need to visit a repair shop to replace parts. Driving like this long-term damages the car and wastes fuel, so don't take it lightly.
