LTFT (Long Term Fuel Trim) too high - What to check? - Page 2 - Ford Focus Forum, Ford Focus ST Forum, Ford Focus RS Forum
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Old 10-07-2019, 04:52 PM   #11
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Originally Posted by 1turbofocus View Post
You also havent listed any mods ??

Tom

No mods... except I did notice that the PCV hose seems to have been cut shorter and connected to another hose piece with some metal piece in between held tight with two clamps. Strange...
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Old 10-08-2019, 01:31 AM   #12
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Somebody has likely already had trouble there and patched in a piece of hose to fix temporarily.
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Old 10-09-2019, 03:41 AM   #13
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Here's a video showing live data from my O2 sensors at idle:

https://my.pcloud.com/publink/show?c...1WdCxoVRpaCyUy

So this shows the sensors are working correctly, right?
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Old 10-09-2019, 03:07 PM   #14
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Originally Posted by smokinhiro View Post
Here's a video showing live data from my O2 sensors at idle:

https://my.pcloud.com/publink/show?c...1WdCxoVRpaCyUy

So this shows the sensors are working correctly, right?
Those output voltages look nominal to me.

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Old 10-09-2019, 03:15 PM   #15
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No mods... except I did notice that the PCV hose seems to have been cut shorter and connected to another hose piece with some metal piece in between held tight with two clamps. Strange...
Please keep in mind that the factory system from the intake manifold to the PCV valve uses two sections of hose with a rigid tube section in between (although it sounds like your setup may be non-factory).

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Old 10-09-2019, 03:35 PM   #16
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X2 post #15, I should pull my head out of it....................I'm losing it.
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Old 10-11-2019, 03:22 PM   #17
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Please keep in mind that the factory system from the intake manifold to the PCV valve uses two sections of hose with a rigid tube section in between (although it sounds like your setup may be non-factory).

Paul
That's right, there is that metal tube that goes by the side of the engine... The fix I mentioned was found at the back of the engine where the tube goes back to the intake manifold. I learned that's where the pipe is most likely to collapse. I'll get the replacement hose in a few days so I'll post a photo of the old hose... and will report if the problem is fixed. Thank you for all your input!
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Old 10-11-2019, 03:28 PM   #18
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X2 post #15, I should pull my head out of it....................I'm losing it.
I appreciate your patience, I'm only learning here :)
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Old Yesterday, 01:28 AM   #19
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Not a problem pal, I had just forgotten about the steel tube bolted to end of head. Sounds like somebody has messed with the other end of the piece in back though.
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Old Yesterday, 07:53 AM   #20
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Your data isnt very informative because it only shows the peeks and not the low side and you need to see both , your off by 2% just on the peeks which isnt much to worry about but what about the low side

The your LTFT is on and we cant see how much it has already corrected for your stft

Tom
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