AutoElectNG:


Nope. Nothing of the sort.

There are general rules like was quoted above, then there are specifics per vehicle.

Some vehicles are tuned to run richer than others, only by checking factory specifications will you determine how a specific vehicle performs and deviates from a general rule or its particular implementation of a general standard.

I defer to the information from the factory.

Infact, I consult factory information for every repair job, I believe it would be terrible to present me information that I should know but I do not, I would lose face.

One thing you can never get from me...I will not attack anyone, and if I am attacked, I will respond in a very civil manner. If I see what I do not agree with, I will present counterfacts, but no name calling or slurs.

So, I will go with factory information and I recommend everyone to do the same.

Have a lovely morning...and do the best to build your brand by responding in a mature way, the world is watching.

AutoElectNG:


Nope. Nothing of the sort.

There are general rules like was quoted above, then there are specifics per vehicle.

Some vehicles are tuned to run richer than others, only by checking factory specifications will you determine how a specific vehicle performs and deviates from a general rule or its particular implementation of a general standard.

I defer to the information from the factory.

Infact, I consult factory information for every repair job, I believe it would be terrible to present me information that I should know but I do not, I would lose face.

One thing you can never get from me...I will not attack anyone, and if I am attacked, I will respond in a very civil manner. If I see what I do not agree with, I will present counterfacts, but no name calling or slurs.

So, I will go with factory information and I recommend everyone to do the same.

Have a lovely morning...and do the best to build your brand by responding in a mature way, the world is watching.

oyefelix:
Autoelectng ,abeg I need your unbiased view ,I can see you peeping.
Nurey and co don already chop bribe and no want talk again

nurey:


I didn't respond to this topic because my knowledge about automobiles is not as sharp as the gurus here. Nobody can afford to bribe me as my price is integrity

Oyefelix try to be more civil and show evidence in details and stop throwing jabs at others. Cartalk threads are learning points in future, in 2years time, this thread would be used as a reference point, you don't want to be known as an utaka attacker Thuraya

oyefelix:

Those boys should be cautioned too to stop attacking my own oga too especially when they are openly wrong .

Kashif:
What a thread!

This is Cartalk, known for maturity and mutual respect. It's is supposed for knwledgeable minds and learners alike. We don't need to hurl disparaging remarks at each other. Somebody does not know what you know simply because he has not been exposed to it. A perfect mind is all of us put together. I love civility but know I have been found wanting too! Too much space and time have been taken here on personal attacks, instead of education.

Peace everyone!

On to the matter.....

Even if the air filter hose in a MAP system is burst completely open, and funnel attached, the MAP reading will not change, and the engine should not run lean. However, if there is a post MAP leak, there will be engine performance issues.

Even in MAF design, a post MAF leak will have little effect on the MAF reading (depending on the size of the leakage) but will cause performance issues due to the unmeasured air.

The difference in STFT and LTFT is in their names. Short term tells you what is happening now while long term tells you what has been happening. Assuming the open hose has an effect on the FT in Gazzuzz experiment, it would show in STFT, not LTFT. If a lean or performance code is not set in 100km, I don't see it setting. To eliminate all doubt, run the car in check mode.

On the flip, for that engine to have a LTFT of 16% means there is an underlying problem. There is too much air going in, or there is fuel supply problem. I personally will be concerned if my LTFT is more than 3%.

Shalom.

oyefelix:

Those boys should be cautioned too to stop attacking my own oga too especially when they are openly wrong .

oyefelix:
Autoelectng ,abeg I need your unbiased view ,I can see you peeping.
Nurey and co don already chop bribe and no want talk again

mayor2013:


You have spoken brilliantly well. Your last paragraph killed it all. This area is where is still being swept under the carpet. The big question here goes thus:

" What happens if too much air continues to go into the engine "

Kashif:
What a thread!

This is Cartalk, known for maturity and mutual respect. It's is supposed for knwledgeable minds and learners alike. We don't need to hurl disparaging remarks at each other. Somebody does not know what you know simply because he has not been exposed to it. A perfect mind is all of us put together. I love civility but know I have been found wanting too! Too much space and time have been taken here on personal attacks, instead of education.

Peace everyone!

On to the matter.....

Even if the air filter hose in a MAP system is burst completely open, and funnel attached, the MAP reading will not change, and the engine should not run lean. However, if there is a post MAP leak, there will be engine performance issues.

Even in MAF design, a post MAF leak will have little effect on the MAF reading (depending on the size of the leakage) but will cause performance issues due to the unmeasured air.

The difference in STFT and LTFT is in their names. Short term tells you what is happening now while long term tells you what has been happening. Assuming the open hose has an effect on the FT in Gazzuzz experiment, it would show in STFT, not LTFT. If a lean or performance code is not set in 100km, I don't see it setting. To eliminate all doubt, run the car in check mode.

On the flip, for that engine to have a LTFT of 16% means there is an underlying problem. There is too much air going in, or there is fuel supply problem. I personally will be concerned if my LTFT is more than 3%.

Shalom.

mayor2013:


You have spoken brilliantly well. Your last paragraph killed it all. This area is where is still being swept under the carpet. The big question here goes thus:

" What happens if too much air continues to go into the engine"

oyefelix:

Those boys should be cautioned too to stop attacking my own oga too especially when they are openly wrong .

mayor2013:


I don't need to pull out an argument on this. Did you just ask me that question up there. You better come to the field of play first. An advice

timifakay:
www.nairaland.com/attachments/6142589_img20171022132235_jpegc4586f61c5aed2b34b84390af659c239
Vehicle used for experiment.

www.nairaland.com/attachments/6142590_img20171022093743_jpega9d3dda938f61cc1c3d4a0091300aad0
Dashboard of said vehicle in the YouTube video.



https://www.youtube.com/watch?v=gxRyHVczYFs

GAZZUZZ:


butterfly/IACV controls air into intake. Where will too much air come from?

I will use My IX35 for next example, same principles apply.

timifakay:
www.nairaland.com/attachments/6142589_img20171022132235_jpegc4586f61c5aed2b34b84390af659c239
Vehicle used for experiment.

www.nairaland.com/attachments/6142590_img20171022093743_jpega9d3dda938f61cc1c3d4a0091300aad0
Dashboard of said vehicle in the YouTube video.



https://www.youtube.com/watch?v=gxRyHVczYFs

GAZZUZZ:


whats you summary sir?

GAZZUZZ:


whats you summary sir?

GAZZUZZ:


butterfly/IACV controls air into intake. Where will too much air come from?

I will use My IX35 for next example, same principles apply.

mayor2013:


Ram air

I honsetly do not get you?

chukel:
leave field of play and answer this. That's a very lame excuse. If you don't understand the theoretical basics of this issue, what will u then apply in field of play. At what mile do u expect that car to throw up ur phantom lean code. U should be very grateful for having been taught something new on this thread. There is no shame in it. Everyone learns. I learn too

timifakay:

Intake connected.
STFT: -10.2%
LTFT: 25.0%
MAP: 33kpa
RPM: 804/min

www.nairaland.com/attachments/6142665_screenshot20171022134416_jpegcccf60c58b11d9f7a3f7093ebe829149

STFT: -1.6%
LTFT: -0.8%
MAP: 33kpa
RPM: 1673/min

www.nairaland.com/attachments/6142666_screenshot20171022134429_jpeg14450526084c21cad7e383042c286c30

STFT: -4.7%
LTFT: 8.6%
MAP: 41kpa
RPM: 3091/min

www.nairaland.com/attachments/6142667_screenshot20171022134432_jpeg3fcc61a97d8cea94d89609475460f4ec


Intake disconnected

STFT: -8.6%
LTFT: 25.0%
MAP: 34kpa
RPM: 849/min

www.nairaland.com/attachments/6142670_screenshot20171022134440_jpeg2d4aa71a01c3eb9f9c6d966a35e35a98

STFT: - 8.6%
LTFT: -0.8%
MAP: 46kpa
RPM: 1733/min

www.nairaland.com/attachments/6142671_screenshot20171022134444_jpegf24e22ecb30583f783ca7de0ff05c1c8

STFT: -0.6%
LTFT: 13.3%
MAP: 44kpa
RPM: 3187/min

www.nairaland.com/attachments/6142672_screenshot20171022134450_jpegaa449a807a5962a1a97bf6e304555652

Same values before intake was disconnected, when intake was disconnected and after intake was connected.

mayor2013:


After you disconnected your intake air hose. Look at the value your getting on your LTFT(25%). Don't you fink that value is too significant compared to when your intake air hose is connected. Outside of this you never showed us values while driving car was just on a stationery platform.

increasing engine rev will mimic driving. But im sure you already knew that

GAZZUZZ:


increasing engine rev will mimic driving. But im sure you already knew that

mayor2013:


After you disconnected your intake air hose. Look at the value your getting on your LTFT(25%). Don't you fink that value is too significant compared to when your intake air hose is connected. Outside of this you never showed us values while driving car was just on a stationery platform.

GAZZUZZ:
oyefelix, what you do not know is that outside of NL honmusa, mayor2013 and I are very good friends, this is just technical sparing, very good for our knowledge base.

I ran thru your old posts and realized you have grown in knowledge since your last threads.

Argue technically, its good for your knowledge base.

oyefelix:

whatever I know today the credit goes to my oga and I can't stand your boys to be rubbishing him .