Hello, I am new here, I have a 2002, Honda Jazz, 1.2, IDSI, MT with 200k km and I have the following problem:
After 10 minutes of driving it starts to misfire/jerk like 2 or 3 times when I vary the gas pedal or I keep the gas pedal steady and the car encounters more load, I mean a hill or something like that. After a longer period of driving the engine stalls and I get P0336, I’ve gotten before P0300+ all four cylinders but that went away with a new EGR valve . The sensation is like the loss of power. The car would do this after 5 hours of continuous driving about 3 years ago, and since then it would take less and less time, from startup for it to misfire/jerk/stall. The car is also undriveable when I start the A/C it just stalls when I press the gas pedal. And this year then didn’t pass emissions inspection due to unburnt hydrocarbons.
I’ve tried 6 different mechanics and haven’t found the problem.
Things changed and checked regarding the problem: 4 years ago replaced timing chain, tensioners and guides at 150k, 2 years ago oem spark plugs all 8, engine and transmission mounts, did a valve adjustment, 1 year ago replaced the fuel pump and sieve, replaced a bad alternator which was putting out 14.5V, oem EGR valve and gasket, used injector cleaning additive, changed the battery, oem crank shaft position sensor and checked the cable and connector at the sensor end, did a relearn for the sensor, it has a good cylinder compression, checked for vacuum leaks around the mass air flow sensor and intake manifold with carb cleaner, it burns about 1L of oil every 20k, I usually use 100 octane gasoline with not much difference from 95.
The car is becoming undriveable quick and I don’t know where to go next or what to check. Mechanics don’t really help where I live, they don’t check they just ``change parts by ear``. Sorry for the long post.