Why can't the Howo V460 accelerate when idling at 1000 rpm?
4 Answers
The issue of the Howo V460 being unable to accelerate when idling at 1000 rpm is related to fuel system and electrical system problems. Below are the specific explanations for the causes: Fuel system reasons: A lean air-fuel mixture causes insufficient thrust on the piston after ignition, prolongs combustion time, and leads to engine overheating and other faults. The judgment for a lean mixture is poor acceleration during operation, which improves when manually adjusting the choke or pumping fuel, but returns to poor acceleration when the mixture is not enriched. Electrical system reasons: High-voltage interruption: Faults in high and low voltage components and wiring of the ignition system can cause intermittent high-voltage sparking, resulting in intermittent engine operation and poor acceleration; weak or red high-voltage spark: Faults in ignition circuit components and wiring can cause excessively weak high voltage, leading to poor engine performance and suboptimal high-voltage sparking.
My car has the same issue, idling at 1000 RPM and can't accelerate, so annoying! From a technical perspective, it's most likely due to a dirty throttle body or excessive carbon buildup, as high idle speed commonly occurs with intake pipe or sensor blockages, causing the mass airflow sensor to give false readings. Plus, the fuel delivery problem could be caused by clogged fuel injectors or a weak fuel pump. Last time I fixed it by disassembling and cleaning the throttle body myself. Don't overlook ignition system failures either—worn spark plugs can severely affect acceleration response. I recommend buying an OBD scanner to check for trouble codes. If it's an electronic throttle issue, don't delay—take it to a shop for professional service. Regularly changing the air filter can help prevent this situation.
After driving for many years, I've experienced a few instances where the idle speed was at 1000 RPM and the throttle didn't respond. I suspect it's mostly due to fuel or electrical system issues. High idle speed is often caused by a clogged air filter or sensor misreporting, while failure to accelerate may be due to a faulty fuel pump or carbon buildup in the injectors. Check if the battery voltage is normal, as low voltage can trigger engine protection. Once, I didn't change the oil in time, leading to insufficient pump pressure and similar symptoms. My suggestion is to start with the basics: first replace the fuel filter and test the fuel line pressure, and avoid randomly disconnecting wires yourself. Regular maintenance can prevent these troubles.
When I was a new driver, I also encountered unstable idling and inability to accelerate. A friend said it might be due to a clogged fuel line or spark plug issues. An idling speed of 1000 RPM is too high, indicating the engine isn't responding to the throttle signal. Check if the fuse is blown, as loose battery terminals can also cause this. A simple solution is to clean the throttle body and fuel injectors. If that doesn't work, take it to a professional shop to test the electrical circuits. Don't be afraid to spend money—safety comes first.
