What causes intermittent fuel supply failure in the Haval H6?

[ElenaAnn]

Haval H6 intermittent fuel supply failure may result from the following causes: 1. Hydraulic torque converter malfunction; 2. Automatic transmission failure; 3. Electronic control system issues. These problems require professional inspection and diagnosis at a repair shop to identify the exact cause before repairs can be made, as they cannot be resolved by vehicle owners themselves. Additional information: As an urban SUV, the Haval H6 offers excellent spatial performance. Beyond passenger space, it provides ample cargo capacity with 808L trunk volume, expandable to a maximum of 2010L when rear seats are folded forward.

[Jade]

My H6 also had this issue before. While driving, suddenly stepping on the gas pedal would have no response, and then it would work again after a while. This could be a minor or major problem. Later, I found out it was an issue with the fuel pump. After driving an old car for 70,000 to 80,000 kilometers, the fuel pump tends to fail to draw fuel properly, especially during highway driving. Another time, it was because the fuel injector was clogged with carbon deposits, causing poor fuel supply. Poor contact in the ignition coil can also cause this—check if the malfunction indicator light is flashing. The most troublesome issue is when the throttle pedal sensor fails, sending incorrect signals to the computer. This situation is quite dangerous, especially when overtaking and experiencing sudden power loss. I recommend not trying to fix it yourself; instead, take it to a professional mechanic to diagnose the trouble codes with a scanner, focusing on the fuel and electrical systems.

[FaithRose]

I've researched the issue with the Haval H6. Intermittent acceleration failure should be analyzed under several scenarios. If it occurs during cold starts, it might be due to carbon buildup jamming the throttle valve flap. Cases appearing when the engine is warm require more attention on fuel pump issues - check if the gasoline filter is clogged. Another possibility is a loose connection in the accelerator pedal sensor, which I've encountered occurring particularly frequently during rainy days. Also, don't overlook potential loose connections in the engine ECU power supply wires - this is hard to diagnose but can indeed cause signal interruption. I recommend first testing the fuel pump pressure at a 4S shop; normal pressure should be around 3 bar. While there, have them check the fuel injection pulse width data stream - sudden power cuts would indicate wiring harness problems. You can first try switching gas stations to rule out fuel quality issues.

[VonErin]

Anyone who drives a Haval H6 knows this kind of headache. The key is to observe the symptoms: if the engine suddenly cuts out and then recovers during acceleration, focus on checking the fuel pump relay and fuse contact points; if the engine doesn't respond when you step on the gas but the tachometer moves, it's likely a throttle position sensor issue; if the tachometer doesn't move at all, the pedal sensor is probably faulty. Older cars especially need to watch out for oxidized wiring harness connectors—I've personally dealt with corroded pins in the main relay box. Another easily overlooked issue: a stuck brake light switch can make the computer think you're braking, causing it to cut fuel automatically. It's recommended to take a road test with the mechanic to reproduce the fault and diagnose it immediately when it occurs—these intermittent problems are the hardest to catch.