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Old 06-22-2020, 05:00 AM   #1
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Code Reader screen shot photos at idle

Not sure what sections relate to checking varioCam working correctly? These readings are on idle.











The reading of the section I guessed were relevant at 3000 revs are;
LTFT - B1 27.34%
LTFT - B2 28.12%

STFT - B1 0-2.34%
STFT - B2 0-3.12%

Spark advance 19.5%

SHRTFT 11 -10%
SHRTFT 12 99.21%

I have (honestly) no idea what these "LTFT" etc actually mean and if anybody can look at these readings and suggest areas of concern or help then please do. I just need to know what section to look at when it is driven over 3000 revs (by co-pilot)?
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Old 06-22-2020, 06:58 AM   #2
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Quote:
Originally Posted by DaveBBOXSTER View Post
Not sure what sections relate to checking varioCam working correctly? These readings are on idle.











The reading of the section I guessed were relevant at 3000 revs are;
LTFT - B1 27.34%
LTFT - B2 28.12%

STFT - B1 0-2.34%
STFT - B2 0-3.12%

Spark advance 19.5%

SHRTFT 11 -10%
SHRTFT 12 99.21%

I have (honestly) no idea what these "LTFT" etc actually mean and if anybody can look at these readings and suggest areas of concern or help then please do. I just need to know what section to look at when it is driven over 3000 revs (by co-pilot)?
You need a scanner that will show degrees of camshaft advance.
Then you watch the camshaft advance when you get above the actuator trigger threshold. (1500 RPM I think) the camshaft advance will jump up.

An easier way is a scanner that can actuate the Variocam actuators.
You trigger an actuator at idle with the scan tool and you hear and feel the motor run differently= rougher. You can trigger one side at a time.
Both of my scanners can do it, makes testing the function of actuators, injectors and other modules simple.

If you decide to go for another scanner look at Foxwell. Mine is the 520NT Pro, under $200.00 US.
I think they have upgraded to a 530NT now as mine is a year or two old.

Last edited by blue62; 06-22-2020 at 07:05 AM.
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Old 06-22-2020, 11:18 AM   #3
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Quote:
Originally Posted by blue62 View Post
You need a scanner that will show degrees of camshaft advance.
Then you watch the camshaft advance when you get above the actuator trigger threshold. (1500 RPM I think) the camshaft advance will jump up.

An easier way is a scanner that can actuate the Variocam actuators.
You trigger an actuator at idle with the scan tool and you hear and feel the motor run differently= rougher. You can trigger one side at a time.
Both of my scanners can do it, makes testing the function of actuators, injectors and other modules simple.

If you decide to go for another scanner look at Foxwell. Mine is the 520NT Pro, under $200.00 US.
I think they have upgraded to a 530NT now as mine is a year or two old.
Yes that is exactly the kind of test it needs to be sure
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