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I have a 2005 Accord 4 cylinder with 300,000+ miles on it (not a typo) that is producing a terrible jerk consistently at 2600-2700 RPM. Doesn’t matter if I gun it from a standstill running it up to that RPM or drive it gingerly through all the gears until it hits 2600 in 4th or 5th gear, 2600 is the magic number. Acts like it isn’t getting fuel or something.
Ran the code reader at AutoZone and it is kicking out the following codes along with recommended suggestions:
P1009 VTC advance malfunction
Possible Resolutions: Check VTC strainer for blockage; faulty VTC oil control solenoid or circuit; faulty VTC actuator; or engine mechanical conditionP2646 VTEC oil pressure switch circuit low voltage
Possible Resolutions: Check engine oil level & pressure; Open or short circuit condition; Failed VTEC pressure switch.Per this video (http://youtu.be/PknGSpDsmiI), I have cleaned the VTC strainer and the solenoid and it’s strainer and have just replaced the VTC oil control solenoid valve expecting that to fix it since the two cleaned strainers didn’t.
It is due for an oil change. I saw another post where a guy had done what I have, disconnected the battery for a while to clear the codes and it ran fine after the codes had been cleared. I haven’t tried that yet so that is my next step.
What am I missing from a troubleshooting standpoint and how can I fix it?
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Only thing i would guess, is that the o2 sensor is bad, and its reading rich, so its trying to correct it by leaning it our, and when u hit the higher rpms, there is too much air to gas ratio, not letting it fire correctly…just my guess, thanks
You are likely on to something. I neglected to mention it’s also throwing a P0141 code which is indicating an O2 sensor problem. I’ll get that changed and see where we end up. Can’t believe I left that off the original post.
I experienced heavy hesitation at the same 2.5k-RPM range only when the engine was cold, and the problem was due to a faulty O2 sensor. Different make, although same era Honda engine, and slightly different error code.
Fuel trims? Never heard of such a thing so I am blind in figuring that one out. Thought the O2 sensor had me fixed, as I tested it Friday night with much success allowing it to warm up and pushed it through 3500 RPM without issue. The wife drove it for the first time yesterday morning since then and it started acting up again at 2600-2700 RPM. She was 15 miles away from the house on her way to church when it started doing it so it has to have time to get good and warm before it starts acting up. On her way home she had no problems at all.
Can you get scan readings while the car is driving down the highway or should I just rev it up to more than 2700 RPM sitting in the parking lot for the reading?
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