What Causes the Car's RPM to Not Increase?
2 Answers
Reasons why the car's RPM does not increase: 1. The throttle position sensor may be too dirty or have a voltage imbalance, leading to electronic throttle failure; 2. In the engine's intake, fuel, and ignition systems, any component failure or abnormality in one of these systems could cause the car's RPM to not increase even when the throttle is fully pressed; 3. Malfunction of the ECU control unit. There are many factors that can cause the car's RPM to not increase when accelerating. Using a diagnostic tool to read the car's fault codes can help identify which module is reporting the issue, allowing for targeted repairs. It is recommended to directly visit a repair shop for inspection and maintenance. The engine's RPM directly affects the number of work cycles per unit time or the engine's effective power output. Since the effective power varies with RPM, specifying the corresponding RPM is essential when discussing the engine's effective power.
My old buddy also encountered the situation last week where the RPM was stuck at 3000 and refused to go up no matter what. After struggling for a long time, we finally found out it was an exhaust system issue. When you press the accelerator and the RPM won’t increase, the first thing to check is whether the air filter is clogged with dust like a mask—if it can’t suck in air, the engine naturally loses power. Then there’s that inconspicuous intake manifold—if it’s leaking or cracked, the air-fuel mixture ratio will be off. If the fuel pump is humming extra hard, it’s likely struggling to keep up with fuel supply. Spark plugs coated with too much carbon deposit will weaken ignition, and the RPM won’t rise either. The most troublesome issue is a clogged catalytic converter—if exhaust gases can’t escape, the engine gets choked up, and the tachometer won’t budge even when you floor the accelerator. Fixing this requires a very delicate approach—it’s best to find a reliable mechanic to inspect it with a borescope. Whatever you do, don’t try to force it open yourself.
