How to Perfectly Solve the Shaking Issue in the 7th Generation Honda Accord?
4 Answers
In most cases, the shaking phenomenon in the 7th generation Honda Accord is caused by poor combustion within the cylinders. The reasons and solutions for the Accord's shaking are as follows: 1. Steering Wheel Shaking: A car wheel is composed of a tire and a rim forming an integral unit. However, due to manufacturing reasons, the mass distribution of various parts of this unit cannot be perfectly uniform. When the car wheel rotates at high speed, it creates a dynamic imbalance, resulting in wheel shaking during driving. Solution: Adjust the dynamic balance. 2. Idle Shaking: The engine idle speed is preset in the ECU. When the RPM drops below a certain threshold, the car's computer automatically adjusts it. If the idle speed is too low and causes shaking, it indicates that it has exceeded the ECU's control range. Solution: Replace the thermostat.
I'm so familiar with this issue! Last time when helping my uncle repair his old Accord, I encountered the same problem. Focus on checking the engine mounts - rubber pads in cars over seven years old are mostly aged and cracked. Place your palm on the engine hood while revving; if vibrations intensify, it's 80% likely the culprit. Second, inspect throttle body carbon buildup - you can clean it with carb cleaner and a toothbrush, but remember to remove it for thorough cleaning. Don't skimp on spark plugs - use NGK OEM models, as aftermarket ones easily cause misfire vibrations. Finally, check the subframe bolts beneath the engine mounts - one car had loose bolts causing whole-vehicle resonance, which was solved by tightening them. Also, use fuel system cleaner for the fuel lines - insufficient fuel pump pressure in old cars can also cause shaking.
My experience is to start with the basics. First, thoroughly inspect the condition of all four engine mounts. If the rubber is cracked more than 3mm, they must be replaced. If vibration persists after replacement, check the ignition system: pull out the ignition coils one by one and listen for changes in engine sound - the cylinder that shows no change is problematic. Last year, my car had cylinder misfire vibration caused by ignition coil leakage, which was resolved after replacement. Check if the air filter box is loose, as aged plastic clips can cause buzzing resonance. If vibration is particularly noticeable at red lights, throttle body cleaning is likely needed - DIY disassembly and cleaning costs about 50 RMB in materials, saving 300 compared to shop service. Remember to perform ECU adaptation after replacing parts.
Found a trick when doing modifications: replace the high-voltage wires with a 5-core shielded competition version. When the original high-voltage wires age, their resistance becomes unstable, and the fluctuating ignition voltage at idle can cause rhythmic vibrations. The spark plugs should be replaced with iridium-platinum IX series, with the gap adjusted down to 0.7mm. For cars with ignition enhancers, be cautious—the 7th-gen Accord has a low-output alternator, and excessive current from the ignition enhancer can actually cause voltage instability. It’s best to install a voltmeter for monitoring; if the voltage drops below 13.5V at idle, it’s time to check the alternator brushes.
