What is the reason why the Envision does not move when stepping on the accelerator uphill?

[VivianDella]

The reason why the Envision does not move when stepping on the accelerator uphill is clutch slippage. The following are specific details about the related content: 1. Manifestation: Clutch slippage mainly manifests as the vehicle speed not increasing with the rise in engine RPM during acceleration while driving. The engine's power cannot be fully transmitted to the drive wheels, resulting in weak driving force, especially noticeable when going uphill. 2. Cause: The main reasons for clutch slippage are insufficient friction of the clutch friction plate; shifting gears prematurely or disengaging before the clutch is fully engaged; prolonged driving with the clutch partially engaged or coasting with the clutch pedal depressed; and abnormal wear of the clutch plate caused by abruptly stepping on the accelerator when the gear is not fully engaged or disengaged.

[McRylee]

Last time when driving the Enclave uphill, I encountered the same issue—stepping on the gas pedal all the way but the car moved sluggishly. The mechanic said it’s likely due to worn-out automatic transmission clutch plates, causing power loss and slippage when high torque is needed for climbing. Another possibility is degraded transmission fluid from lack of changes, reducing hydraulic system efficiency. Avoid flooring the accelerator; try switching to manual mode and locking a lower gear first. If the car still rolls back, get the transmission checked immediately. A friend’s car once had this problem and ended up needing a full transmission replacement. Always engage the electronic parking brake firmly when stopping on slopes to prevent rollback accidents.

[OLorenzo]

Have you ever experienced stepping on the gas but the car won't move when driving uphill? My Envision had this issue, and later I found out it was because the fuel filter hadn't been changed for three years and got clogged. When climbing hills requiring high fuel injection, the engine couldn't get enough fuel and just roared without power. It could also be carbon deposits jamming the throttle valve in a half-open state, causing insufficient air intake. I recommend first adding a bottle of fuel system cleaner and taking a highway drive to clear out the carbon deposits. If that doesn't work, then check the fuel pump pressure. I remember once the dealership told me my fuel pump had unstable voltage, and replacing the pump core fixed it. Don't stomp on the gas pedal hard—it's bad for the car and wastes fuel.

[VanJuliana]

Experiencing difficulty starting on a slope with the Enclave is most likely due to the transmission temperature protection activating. Especially during continuous uphill driving in summer, an overheated transmission will forcibly limit power output. I've encountered this twice—pulling over and turning off the engine for ten minutes resolved it. Check if the transmission fluid level is slightly above the middle mark on the dipstick; if the fluid appears black, replace it immediately. Additionally, air leaks in the intake piping of turbocharged vehicles can cause similar issues. Last time, my car had a cracked intake pipe—it was fine on flat ground, but under boost during uphill driving, the air leak caused a significant power loss. If you notice black smoke from the exhaust pipe, pay special attention to this problem.