TunerPro User Forum

gavin

last week my lambda broke,now my AFR is very rich in idlle and part throttle map.i found another lambda map it is 1x6 7952 adres i droped all the values to 0 now i have full control on iddle fuel and part throttle maps but a made shortcut to lambda signal betwen pin 70 and 71 try it Oldman

gavin

When you disconnect the O2 sensor, it only keeps the Lambda circuit open, then the ECU will give full fuel all of the time which gives a vrey rich burn. I think I have found problem with mine, I am not sure if I am right, but this is what I think: the origianl ECU is to be run on a 2.5L engine, now...

gavin

For all you guys that have a problem with adaptation on 402 i there is not one but 4 lambda maps i drop values in all off them to 0 and now i have perfect AFR on WOT first map is 1x6 7888 second one is 1x6 7896 third one is 1x4 78a2 forth is 1x4 78ac I have tried that, and ECU adaption still get in...

gavin

try it ,values are the same like in the 098 bin.

gavin

For all you guys that have a problem with adaptation on 402 i there is not one but 4 lambda maps i drop values in all off them to 0 and now i have perfect AFR on WOT first map is 1x6 7888 second one is 1x6 7896 third one is 1x4 78a2 forth is 1x4 78ac I had opportunity to use a ostrich II i was traci...

gavin

for RPM limiter, data is hex(90 65) you must swap the 2 bytes gives you hex(65 90) change to decimal gives you 26000 /4 = 6500 NB: to swap the bytes click on LSB first for ignition tables The factor for RPM is 40, and the offset 0. For the Load the factor is 0.715, the offset is 0. The factor for t...

gavin

what about formulas ? i know only how to calculate RPM CF 10 05 08 0a 0c 08 0b 0a 0a 09 0a 0c 0a 09 06 0a 60 Hex 27 16 5 8 10 12 8 11 10 10 9 10 12 10 9 6 10 96 Dec formula :60 Hex = 96 Dec (96*40) -(256*40) and that give 6400. so now we have Dec: 5 8 10 12 8 11 10 10 9 10 12 10 9 6 10 6400 the next...

gavin

Hi i'm trying to learn more abaut motronic map, what will be the descriptoion and formula for:
C1
CB
CE
CF= load MAF?
D1
D2
D3=Volt?
D4
D5=RPM?
D6
D7=engine temp?
D8
D9
please HELP!!

gavin

i Got it,it make sens,but in my bin rasing the values does not work on a car! the only values that work are in 7988 D7=colant 04=axis range 1c 36 19 7e = axis data value ( i dont know formula) 68 52 52 44 = the data contained = (decimal *10) = 1040 820 820 680 rpm the same data is stored in 7992,sec...

gavin

How? do you have ostrich 2 ?i have the same values in bin from tuner pro web site but they don't work i tried them yesterday,the one that work are in 7988 address. and they are in decimal x*10

gavin

aboutton,How did you found that this is iddle rpm map ? it starts with D7 i notice that all maps that are in XDF start at CF ?

gavin

Idle speed location in the bin file that is available for download here at tunerpro.

Hex address 7988, map size 1x4,
7992 maps size 1x4
79A6 maps size 1x4

One of those should be it, so try it. you can add those to the existing XDF if you know how to edit it, it is easy,

gavin

Today i tried to do something with AFR,first i disconected the MAF and it helps AFR was around 14.5 but a hade no chance to try it on WOT just made some smooth runs around the block. But i dont like to run with stuff unplugged,so i did think abaut "injetor constant" i hade to set the "...

gavin

New problem,two weaks ago something happened with fuel mixture,during normal drive it went very Rich,first in idle and part trotle maps 2 days after in WOT map. I get no errors in ECU,i made new chip with the same map,it gave me nothing next day i made map with lambda adaptation back ON still it get...

gavin

Yes you did,and it is a very god job.but the revlimiter adres was correct,and it was for free

gavin

Warning! this guy hasn't made a single XDF and uses my own free XDFs to make money on people. People come to me when they want XDFs done correctly and my time spent on doing them correctly is not for free ;) I also have paper damos for early bosch dme's so my xdf authoring/maps are not a guess like...

gavin

Not now,but in future i will need definition for m52b28 engine from Z3,this ECU doesn't have Eprom,so i will need to buy obd2 programer like Galletto or KWP2000.

gavin

Great job !!

gavin

What do i have to write to Equation Format ? now it is X-30000

gavin

you are a the first one i know to try this, so god luck!

gavin

If there will be no MAF how will this effect to the ECU? what other things you are not gonna plug in?

gavin

Did you installed the airbox and MAF? dont forget to put in the idle actuator.
project is cool idea but dont forget that m20 head is very fragile i installed m50 because in my m20 head cranked 3 times.m50 is harder to kill

gavin

Finally big success,in my 402 tune. all i had to do is drop to 0 all values in lambda fedback, after i drop them to 50 like "revlimiter" told me ECU was still making changes to the fuel maps. Another thing is that the RPM scale is wrong ,maybe it's because i set the rev limiter higher, the...

gavin

not yet i dont have my Eprom burner so i cant tune, i just disable lambda fedback,like "revlimiter" told me, and install the lambda emulator,even with the lambda emulator signal that is always "perfect and static" the ECU makes the fuel changes.

gavin

I did the actual ignition degrees 2 monts ago, the problem is in the fuel maps,thet dont work properly on my engine.

gavin

Today i made new chip,i lowered the values in all fuel maps,and there is only efect on iddle,AFR it is now 14.5 the WOT 11.3 and normal drive 10.6/12.5,maybe i will just try to switch off the lambda and try tu tune with ECU fault,if you read this topic you will know for how long i have a problem wit...

gavin

Any new feedback about your tune, Gavin ? I still have a problem with stable AFR,i installed a "Lambda Emulator" simple device that sends to ECU perfect lambda signal,thanks to this the ECU dont get Error fault,when orginal lambda is swiched off. Only now after a few days ride AFR on a ca...

gavin

Today i tested the rev limiter,and it works realy nice,so thanks

gavin

i'm still trying to tune my 402,but without eprom emulator it takes a lot of time.

gavin

I was on the dyno last year, i did get 240 Hp and 285 NM of tourqe but the AFR was lean 13.2/14.5,the ECU adaptation changed my AFR on every run.
by the way i'm from Poland

gavin

the engine is m50b25 non vanos,crank schaft is from 2.5 TD it is cast iron,made to knife edge balanced with 6 Kg m20 flywheel.rods are stock but the pistons are 2.5 vanos,engine is now 2.8 l,i ported and polished the head ports and installed lighter and biger valves, cam schafts are from Dbilas,m3 h...

gavin

OK thanks,engine is build to reach 8000rpm and more,Now i drive with no rev limiter so it is not really save,i will try it and let you know how it work

gavin

thanks i will try it ,these values look random,how to calculate them properly? what numbers will refer to 7400rpm and 7600rpm?

gavin

in 402 xdf rev limiter ,does not work to,i download the orginal software and in rev limiter adres the value is 6965 orginal rev limiter is 6500 rpm, so the adres in xdf is wrong, anybody know where is real rev limiter for 402 xdf?

gavin

When the engine is cold the iddle rpm and AFR are static,but after the orginal lambda gets hot,the rpm and AFR go crazy.
Any ideas?

gavin

motronic software gives engine big tolerance for fuel octane level and atmosferic presure,I belive that all mecanic changes i made to my engine are beyond ECU adaptation level,so I nead full control over ECU software

gavin

I get no error's on diagnostic check,
if I will disconnect the O2 sensor will the ECU swich in to emergency mode?

gavin

it is hot wire MAF hole system is bosch motronic 3.1

gavin

i made many changes to m20 engines,i did instoll the biger AFM but the best results was after installing m30b35 injectors

gavin

yes i have MAF,N/A-Naturally Aspirated (non turbo)

gavin

Today i went on track with my car and the Air temp was around 17*C last week i set the AFR in WOT map to value around 12.5/13 the Air temp was around 27*C today the AFR was Very lean 16/15.3 is it posible to have that big difference by this 10*C temp difference? engine is N/A

gavin

the bether solution is to convert AFM to MAF it will give faster signal and increase the flow,there are kits like this one
http://picasaweb.google.com/tigrfan/Mil ... qE40XZlo3Q#

gavin

install the AFM and wait for the ECU to adapt,look at the AFR on WOT run,if the AFR will go lean change the values in the WOT map to higher if to rich lower the values,but the bigger AFM will not do much if you will not have biger trottle

gavin

Do you have AFR sensor?

gavin

What device your friend is using to read and burn chips?

gavin

I use the willem programer to burn eproms,if i want to read the data from 27c512 i need to switch conectors in the willem main bord the 27c256 is 32kb memory and have diferent setings,maybe you read the data from the chip with setings for 27c256 that why you only get 32kb

gavin

Yes you did,I'm very grateful especially for the iddle rpm that you told me! but right now it is only thing that works perfect, I still get medium efect on the car performace ,the rev limiter is still out of control,and the WOT fuel is not changing like i want it, the engine cost me a lot of work,I ...

gavin

Yes! I set the feedback map like you told me,and now the AFR is static,today I installed biger trottle,and the AFR was very lean .

gavin

Success !!!after adjusting the feedback in the bin,the AFR is stable,tomorrow I will install big bore throttle and try to adjust the AFR to better value,right now the AFR is little to rich at low rpm,perfect at the middle and to rich at HI

gavin

No chance to have ostrich2 emulator,if you tell me how i will make the lambda regulation on/off swich in XDF. As for eprom I use 27C256 UV erasable.it is 32 kbit memory 27C512 is 64kbit memory. Engine compresion is HI I know that,so I use Shell Vpower racing fuel. for diagnostic i use carsoft interf...

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Axis descriptor for 402 xdf

402 motronic 3.1 variable iddle AFR

AFR VS Air Temperature