What are the reasons for car shaking after replacing spark plugs?
3 Answers
Reasons for car shaking after replacing spark plugs include: 1. The ignition leads were broken or partially broken when removing the spark plugs, causing abnormal ignition. 2. Incorrect installation of spark plugs, such as not tightening them properly (threads not aligned) or ignition leads not fully inserted. 3. The ignition leads are not correctly matched to their respective cylinders. 4. If the issue is not with the spark plugs, it could be due to aging ignition coils leading to decreased performance. Information about spark plugs is as follows: 1. Spark plugs work in conjunction with the ignition system and fuel supply system to enable engine operation, largely determining the engine's performance. 2. Spark plugs are the heart of the engine: The car starts and runs smoothly because the spark plugs continuously produce sparks. Engine shaking could be due to weak sparks from one of the spark plugs, resulting in vibration.
I just changed the spark plugs, and now the car is shaking, it feels like the engine is trembling. This could be because the spark plugs weren't tightened properly, with insufficient torque during installation causing them to loosen; or maybe the wrong heat range was used, causing a mismatch between ignition and engine requirements. Spark plug gaps that are too large or too small can also disrupt the ignition timing, preventing the cylinders from firing properly, and if several cylinders aren't working, it leads to shaking. Another possibility is that the ignition coils or high-voltage wires weren't plugged in properly, with poor contact affecting current conduction. I recommend finding a professional mechanic to check it out—first use a diagnostic tool to check for misfire codes, then manually test each spark plug to ensure proper installation. Don't force it to keep driving; shaking not only affects the driving experience but can also easily damage other components like the catalytic converter, which would be even more expensive to fix. Pay more attention to details when doing DIY car repairs, and you'll save yourself a lot of trouble.
Last time I tried to change the spark plugs myself, the car started shaking as soon as I drove it, which was quite frustrating. I think the main reasons were rookie mistakes, like the spark plugs not being properly aligned or tightened crookedly, leading to poor electrode contact. Or maybe the spark plugs I bought were of poor quality, with materials that couldn't withstand use, causing them to fail immediately after installation. If the ignition coils were old and unchecked, they might also be incompatible with the old spark plugs, leading to ignition failure and shaking. I tried reinstalling them and cleaning the ignition wire connectors, which helped a bit. The experience taught me that while replacing parts seems simple, it's crucial to choose products from reliable sources and use the right tools to secure them properly. If you're not skilled, it's better to seek help from a professional shop to avoid wasting time and damaging the car. Driving with shaking is uncomfortable, consumes more fuel, and if left unfixed, could turn into a bigger, more expensive problem.
