What are the causes of multi-cylinder misfire in Honda 1.8 engine?
3 Answers
Multi-cylinder misfire is caused by poor spark plug contact, excessively high injector voltage, non-functional ignition coil, or insufficient cylinder pressure. Causes of multi-cylinder misfire: Poor spark plug contact may lead to momentary ignition failure, resulting in cylinder misfire. Excessive self-induced voltage in fuel injectors can cause sticking in the next working cycle. Poor heat dissipation of the internal transistor in the ECU may lead to ignition coil failure. Insufficient cylinder pressure can cause ignition failure. Key points of engine maintenance: Use appropriate grade of engine oil, regularly change oil, oil filter and air filter, periodically clean the fuel system and replace spark plugs.
I've been driving a Honda 1.8 for several years, and last week the engine suddenly started shaking severely. It turned out to be a multi-cylinder misfire issue, meaning several cylinders failed to ignite. This is quite common, and the root cause is often a problem with the ignition system, such as old spark plugs, excessive carbon buildup, or damaged ignition coils, which fail to provide a stable spark. Alternatively, it could be a fuel system issue, like clogged fuel injectors or a weak fuel pump, preventing proper fuel delivery. Sensor problems are also not uncommon; for example, a contaminated oxygen sensor can cause the ECU to misjudge and lead to ignition irregularities. In my case, the inspection revealed aged spark plugs, and replacing them promptly fixed the issue. Don’t underestimate this problem—delaying repairs could damage the engine, increase fuel consumption, or cause other faults. It’s best to regularly maintain spark plugs and fuel filters, and if you notice any abnormalities while driving, use an OBD tool for diagnosis immediately to avoid bigger troubles. This Honda engine is sensitive to maintenance, and using high-quality gasoline regularly also helps.
As someone who frequently repairs Honda vehicles, I've encountered numerous cases of multi-cylinder misfires in the 1.8L engines. Most stem from ignition system failures—either spark plugs reaching the end of their lifespan or burnt-out coils, affecting multiple cylinders' normal ignition. Fuel system issues are also common, such as clogged injectors or insufficient fuel pump pressure, leaving the engine starved of adequate fuel. Faulty sensors like the crankshaft position sensor can mislead the ECU, triggering a chain reaction. Sometimes mechanical components are involved too, like a dirty mass airflow sensor causing unstable air intake. I recommend owners start with simple checks—like pulling spark plugs to inspect their condition or testing fuel pressure—simple and cost-effective. Multi-cylinder misfires don't just make the car shake; prolonged issues accelerate engine wear. Remember to regularly clean sensors and replace air filters. While this Honda engine series is fairly reliable, neglecting maintenance easily leads to these problems.
