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Getting a P219A code on Honda fit, engine runs fine. LTFT at around 2.0 and STFT jumping all over when not idling (-10 to 20). Cleaned the MAF, O2 sensor 1, re gapped the plugs (which looks ok, maybe a little lean), put some fuel system cleaner in fuel tank. I’m a not well equipped diy. Suspecting clogged injectors. It’s on my son car running on a tight budget. Any other insight or suggestions?
Also, which parameter the ecu is looking for in order to throw a P219A? Cannot find that info anywhere. To get a P0171 the ecu is looking for a 25% LTFT. Maybe it’s looking at STFT?
When was the last time the valve adjustment was checked/adjusted? Does it happen more when the engine is at operating temp?
my son just bought the car, so I would probably say never… I was planning to do it this winter when I will have some garage time. I’ll try to clean the injectors at the same time.
Like I mentioned before, engine is running fine. STFT is more erratic when accelerating a bit, but when I go full throttle, it looks ok.See if vacuum is low (usually caused by tight valves). Remove o2 sensor see if it runs better (restricted exhaust)
How am I supposed to check for low vacuum? Reading from the MAP?
Like I said, engine is running fine. Removing the O2 sensor is only going to make it run in open loop and I won’t see any movement from stftFound an injector solenoid showing 5 ohms, all others showing 10 ohms. Suspect the faulty injector too slow making the mixture lean for that cylinder, especially at high rpm.
Also regapped the valves, exhaust were ok, intake were too loose. Expecting some engine improvements, but nothing to do with the code.
Also found some oil in the intake, gonna change the PCV valve.
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