What Causes the Engine to Feel Like It's Dragging When Releasing the Throttle?

[StevenLee]

Releasing the throttle and feeling the engine drag could be related to cleaning the fuel system. Improper operation or incorrect installation may lead to this issue, so it's recommended to visit a 4S shop for inspection and repair promptly. The specific reasons are as follows: 1. Upshift Mechanism: When releasing the throttle, it may trigger the upshift mechanism, causing the engine speed to drop naturally (the extent of the drop depends on the gear ratio difference, usually the largest between first and second gears, making the jerking sensation most obvious and frequent at this point). 2. RPM Drop: This results in reduced engine torque output, and since the throttle is released, the engine torque becomes even more insufficient. Consequently, the engine's kinetic energy output is less than the car's demand, making it feel like the car is pulling the engine, hence the dragging sensation. This issue typically occurs during the shift from first to second gear or second to third gear, as these gear ratios have significant differences.

[OSamantha]

As a novice driver, I was really startled the first time I experienced the dragging sensation when releasing the throttle, thinking something was wrong with the car. Later, during driving lessons, my instructor explained that this is a normal traction effect produced by the engine during deceleration, especially when releasing the throttle in high gears of a manual transmission. The engine helps slow down the car, which can save brake pads. However, if the dragging is too strong or unusually noticeable in an automatic transmission car, it's time to pay attention. Possible issues include sluggish transmission response, internal gear wear, or insufficient differential lubricant, which can intensify the pulling sensation. Whenever I encounter this situation while driving, I slow down and check. Don't underestimate the drivetrain system—regular oil and gear oil changes can effectively prevent problems. After all, safety comes first.

[DeKhloe]

Having driven for decades, I've experienced countless instances of engine braking when lifting off the throttle. In manual transmissions, this is a natural effect of engine braking - the engine slowing down and pulling the wheels when you lift off in higher gears is completely normal. But if you feel it's unusually severe, it could be due to the automatic transmission downshifting too aggressively, or excessive play from worn universal joints in the driveshaft. Check if the differential fluid level is low, and whether the throttle position sensor is dirty - these all affect responsiveness. Make it a habit to change fluids every 5,000 km for maintenance, which significantly reduces failure risks. If genuinely concerned, take it to a workshop for an ECU scan with diagnostic tools - problems often hide in the details.

[DeAva]

As a car enthusiast, I always analyze the source of the throttle-off drag sensation first: in manual transmissions, it's often due to engine braking resistance, where the fuel injection system cutting off supply increases resistance. For automatic transmissions, the transmission control module might misjudge and downshift, or excessive differential gear clearance could cause rough operation. Check for aging in the throttle position sensor or ECU wiring. For turbocharged cars, also consider turbo response lag. These require hands-on testing. Don't overlook basic maintenance—something as simple as changing the transmission fluid can alleviate most minor issues, making driving smoother.