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Author Topic: Positive deviation  (Read 21012 times)
Dwynell
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« on: November 19, 2014, 12:11:39 PM »

Installed Rs4 maf  and copied mlhfm for rs4 bin. Checked my file this a mbox still can't figure out was is the cause, other than mlhfm is there and other maps that needs editing.
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nyet
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« Reply #1 on: November 19, 2014, 12:18:16 PM »

That log is useless. You are already in limp.

Get a log before it goes limp
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Dwynell
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« Reply #2 on: November 19, 2014, 04:24:33 PM »

Here is a log with no limp mode, didn't go wot till after 3k rpm may need to work on kfkhfm or ldrxn engine load is way above request
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nyet
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« Reply #3 on: November 19, 2014, 05:25:12 PM »

You need to somehow log a run that *causes* limp mode... not before limp, not after limp..

That one didn't actually cause limp (or shouldn't have, anyway) as far as I can tell.
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ddillenger
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« Reply #4 on: November 19, 2014, 05:29:24 PM »

Load reading high is usually the result of an overscaled MAF. An overscaled MAF is the number one cause of positive deviation in a leak free system.
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Dwynell
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« Reply #5 on: November 19, 2014, 06:16:18 PM »

You need to somehow log a run that *causes* limp mode... not before limp, not after limp..

That one didn't actually cause limp (or shouldn't have, anyway) as far as I can tell.
Earlier you said log was no good due to limp. Only way to no go in limp is if I get the car wot at about 3k rpm
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Dwynell
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« Reply #6 on: November 19, 2014, 06:21:24 PM »

Load reading high is usually the result of an overscaled MAF. An overscaled MAF is the number one cause of positive deviation in a leak free system.
I installed the rs4 maf and copied mlhfm from a f box bin also set mlofs to 200.Did I need to use mlhfm from a different bin
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ddillenger
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« Reply #7 on: November 19, 2014, 06:37:09 PM »

You sure it's an RS4 housing AND sensor?
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Dwynell
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« Reply #8 on: November 19, 2014, 07:01:02 PM »

You sure it's an RS4 housing AND sensor?
yes ordered it from ecs tuning
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ddillenger
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« Reply #9 on: November 19, 2014, 07:03:08 PM »

yes ordered it from ecs tuning

Is it aftermarket, or OEM? If it's aftermarket, throw it in the trash. Get a used B6/B7 S4 MAF and call it a day.
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Dwynell
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« Reply #10 on: November 19, 2014, 07:28:27 PM »

Is it aftermarket, or OEM? If it's aftermarket, throw it in the trash. Get a used B6/B7 S4 MAF and call it a day.
Its a bosch oem
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10101011
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« Reply #11 on: November 19, 2014, 08:57:12 PM »

Its a bosch oem



ECS is full of Chinese OEM crap.  Watch out what buy from ECS !   Don't get me wrong , ECS has good stuff too but they are selling more and more Bosch replica crap and other stuff


LEE
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Poor quality lingers long after the price is forgotten ....
nyet
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« Reply #12 on: November 19, 2014, 10:52:24 PM »

Earlier you said log was no good due to limp. Only way to no go in limp is if I get the car wot at about 3k rpm

You need to log it AS it goes limp, not before, not after..
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ME7.1 tuning guide
ECUx Plot
ME7Sum checksum
Trim heatmap tool

Please do not ask me for tunes. I'm here to help people make their own.

Do not PM me technical questions! Please, ask all questions on the forums! Doing so will ensure the next person with the same issue gets the opportunity to learn from your ex
Dwynell
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« Reply #13 on: November 20, 2014, 07:09:22 AM »

Is it aftermarket, or OEM? If it's aftermarket, throw it in the trash. Get a used B6/B7 S4 MAF and call it a day.
The sensor housing has part#0280218067 and the box the sensor came in has part#077133471k. Did a search for the part #471k came back as maf sensor for b6/b7 s4, so I guess I need find b6 s4 bin & xdf
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ddillenger
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« Reply #14 on: November 20, 2014, 07:21:08 AM »

The sensor housing has part#0280218067 and the box the sensor came in has part#077133471k. Did a search for the part #471k came back as maf sensor for b6/b7 s4, so I guess I need find b6 s4 bin & xdf

B6 S4 MLHFM is the same as B5 RS4.
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