The LPG ECU was fitted last year. The spark plugs are sound; the distributor cap and rotor were replaced. Since there was a hole in the exhaust, the muffler was replaced. The fuel cut-offs were checked, no problem.
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3 repliesThe fact that it misfires on both LPG and gasoline once the engine warms up suggests the problem is independent of fuel type and likely tied to a shared system. This is usually seen with issues in the ignition or engine management system. An ignition coil can develop higher internal resistance as it heats up and start producing a weak spark. This is felt as misfiring once the engine reaches operating temperature. Similarly, the crank or camshaft position sensors can start sending faulty signals as they heat up. If the coolant temperature sensor sends an incorrect reading, it can throw off the engine's fuel mixture. Leaks in the vacuum hoses can also become more noticeable as they expand when the engine heats up. If there's a weak connection at the ECU or chassis grounds, electrical problems can appear as heat increases. For heat-related misfire issues, it's more reliable to check the sensors and ignition system while the engine is hot.
Translated from TurkishHave You Had The Temperature Sensor Checked
Translated from TurkishWhen the weather is cold or wet, it does nothing at all - even the LPG electric signal isn't coming through. The temperature sensor and the ECU were replaced, but the problem is still there.
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