.75 lambda at idle and low load throttle... great wot! Help!

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up50lut3

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #15 on: November 22, 2016, 12:36:14 PM »

requested lambda is 1.. its not a matter of requested, its a matter of it never being able to meet this request.... like i said, when i blip the throttle, it jumps right up to where it should be.... if i hold the throttle, at lets say 3 grand it jumps up, then once( load maybe?) it evens out, it goes to .75 and stays there


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adam-

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #16 on: November 22, 2016, 01:01:31 PM »

What does it go to if you lift it off idle?


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up50lut3

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #17 on: November 23, 2016, 02:27:19 AM »

Quote from: adam- on November 22, 2016, 01:01:31 PM

What does it go to if you lift it off idle?

Goes to requested if I tap the throttle, it goes requested(1) if I tap and hold, it goes requested then back to .75

Torque intervention? Via pedal position? Maybe egt, tho I no nothing on how it's calculated because I know there's no actual sensor.....protection? As this happens once 02 sensor is switched on.

Just traced all 02 wires, checked for shorts, checked resistance and milliamperes, all good on 2 sensors, also tried a second car with the sensors so it's not that.

It's as if it's in protection? Isn't .75 lambda a default to add fuel to cool down the engine I feel I've read that somewhere.... an insights on what maps to check for protection?

This is cruising and resting idle


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adam-

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #18 on: November 23, 2016, 04:02:42 AM »

There's too many variables to try and diagnose IMO. Different MAF, injectors, chassis. Swap good? No codes? Original flash? What happened to immo? ECU belong to loom?


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up50lut3

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #19 on: November 23, 2016, 10:50:44 AM »

Quote from: adam- on November 23, 2016, 04:02:42 AM

There's too many variables to try and diagnose IMO. Different MAF, injectors, chassis. Swap good? No codes? Original flash? What happened to immo? ECU belong to loom?

ive ad this 1.8t swap for about 4 years now. its a complete swap. everything electrical is from a mk4, every sensor, ever plug, ever part of a mk4 motor.... fuel pump, ac, power steering, ambient air temp sensors, dash, cluster.... fuse box...
you get my point, its a mk4 lol

ive had zero issues with this car. been stock, stage 1, 2+ with supporting mods( fmic, tip, exhaust etc..)
none of the harness was cut... infact the only thing mk3 about this car is the taillight and headlight plugs, and the vaccumm pump for the door locks.

...so lets assume that there isnt an issue with the swap.

as i said, i put the 1.8t maf back into its orig. housing.... the only thig diffrent( tha actually mattters here) ia the turbo, downpipe, manifold and injectors..

im not trying to be rude,

but can we assume that i actually have enough sense that i did the swap correctly, and try looking at things that my aid me, instead f telling me chassis issues might be to blame Roll Eyes


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up50lut3

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #20 on: November 23, 2016, 10:54:50 AM »

rant over, sorry....ni keep getting pms telling me i didnt do the swap right.... ignorance i guess...

anyway, yes its an 04 gli awp, SM ecu, cluster and loom from the same car. i bought the wrecked gli and swapped it myself.

as i suggested, a few posts ujp, could it be egt protection or torque intervention.?

saw this from a mastro handbook:

3. Why is my desired lambda .75 but my lambda map is targeting a different value?
.75 lambda is the richest mixture the o2 sensor can request and is often a sign of ECU "ATR" intervention. This occurs if the ECU detects very high calculated EGT's that exceed a predetermined value. The ECU will target a lambda of .75 in hopes of cooling rising combustion temperatures.

site referenced from: http://www.cepavw.org/phpbb3/viewtopic.php?t=22354

is there a variable(s) i can log with VME7Logger that would state what and if the car is in a failsafe mode?

what about B_tabgbts? it says Condition EGT for part protection.

or if anyone has any ideas as to what i can log that may lead me to understand why or where its getting the ok to force rich cond. when requested is 1.0...... at idle and when the requested load(?) seems to drop... like if i give it gas while cruising at 30 then hold the pedal so it acc. then cruises at 50, once the load comes down from the acc from 30-50- cruising at 50, its back to .75 rich.

thanks in advacned for an thoughts


« Last Edit: November 23, 2016, 11:02:31 AM by up50lut3 »	Logged

nyet

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #21 on: November 23, 2016, 11:34:18 AM »

At any point are you planning to post an actual log?


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adam-

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #22 on: November 23, 2016, 12:17:45 PM »

Sounds like the swap is fine.

Upload the bin then; something is wrong.


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TijnCU

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #23 on: November 23, 2016, 12:35:09 PM »

Temin? ~~Dont know how big your injectors are~~..oops didnt read carefully.
I have had counterfeit green giants that leaked terribly, you can check by removing the rail from the manifold and priming the pump. They should not develop drops of fuel (I think.one drop per 2 minutes is acceptable by OEM).


« Last Edit: November 23, 2016, 12:41:49 PM by TijnCU »	Logged

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nyet

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #24 on: November 23, 2016, 12:50:32 PM »

Quote from: up50lut3 on November 23, 2016, 10:54:50 AM

3. Why is my desired lambda .75 but my lambda map is targeting a different value?

Is your desired lambda .75?


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nubcake

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #25 on: November 23, 2016, 01:36:49 PM »

Sorry, I skipped over those walls of text.
Anyways, since there's no log yet, to double-check: is lamfa_w actually 1.0 or does it dip to 0.75?
If it stays at 1.0, then there are 2 main possibilities - hardware and software. (yay, Captain Obvious!)

Hardware-wise - you can check fuel pressure and air leaks downstream of MAF.
Software - well, just too many variables.

The reason I made an emphasis on FP - if the FPR line is torn - it will be rich at idle (vacuum) and more or less normal with a bit of gas, which sorta matches your symptoms.


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royce5950

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #26 on: November 24, 2016, 12:55:41 AM »

if you have a boost gauge maybe something came loose at the T adapter located near the FPR? that could cause a leak?


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adam-

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #27 on: November 24, 2016, 03:12:59 AM »

Upload the file or logs. Prove to us that requested is indeed 1.0.

Tell us what injectors, what FPR, what MAF is CURRENTLY on the car. Does the file on the ECU match the actual original ECU? No cross-flashing?


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fknbrkn

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #28 on: November 24, 2016, 01:41:50 PM »

i bet on a wrong krkte factor


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pitercsg

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	Re: .75 lambda at idle and low load throttle... great wot! Help! « Reply #29 on: July 06, 2023, 11:44:52 AM »

Have the same problem... Did you guys solved it?


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