HELP with tuning...Now with Map and log

[Robbs]

Hi im from sweden so im sorry for my english.
I have a problem with my new car r33.
Here in sweden we have to have exakt right gases from the exaust and i got the wrong values.
so i cant drive the car legaly and i dont got full enjurence.

I dont know what the owner before me have change in the map but i cant get it right.
best i got was
150 hc
1.27 lambda
3 CO
12 O2
need to get under 100 hc and 1,03 lambda

my setup is
Q45 maf? name? counts air
Q45 throttle house? dont know the names.
Sard 850cc injectors, used to run 50%gasoline and 50%e85 before
garret gt3071r
exhaust and downpipe
Greddy intake
Trust front exaust

I think my kconstant and latency is wrong. It is low from what i have read that it should be.
I have read that it should be xxxxx and mine is xxx
My kconst is 143
inj latency 940
volt latency 204
is this normal?
The map is changed to q45 in the list.

Can i messure the maf to see if its broken?
Something with the throttlehousing?

i just got a strobelight to see the ignition so when i plug it in i see the first line at the point on the wheel(cant explaine in english)

The car runs pretty god anyway so im confused.

Anyone got simular setup with a map i can start with?
Hope someone can help me. Thank u guys.

[unex]

what about AFR ? I think this is the first thing you should start at.

[Robbs]

what about AFR ? I think this is the first thing you should start at.

I cant get it to be in the same place. I changed to lambda values insted but on idle around 14-1 and down to around 12 at full throttle. But between that it Can to up against 15 and it cant be stable.

[TM_S13]

on good thing you can do is take a bit and read the nistune tuning manual.
it's available for download on www.nistune.com
it gives very good pointers.
you can always begin from scratch... take the OEM tune, change injectors and maf, adjusting K constant accordingly such as latency...
of course, don't forget to previously save the current tune you have now, in case you don't succeed you can allways go back to that one... =)

[Robbs]

on good thing you can do is take a bit and read the nistune tuning manual.
it's available for download on http://www.nistune.com
it gives very good pointers.
you can always begin from scratch... take the OEM tune, change injectors and maf, adjusting K constant accordingly such as latency...
of course, don't forget to previously save the current tune you have now, in case you don't succeed you can allways go back to that one... =)

I have read the manual and tried to do like it says but it has to be something else? Do anyone know what the values is on q45 if i measure in ohm?

I cant find the original Map for , that would be great to start with. Im use to engines with carburator i have a hotrod ford-31 and firebird -69 that i built the motors in but the mapping i just started with but i do know how it should work. Thank u for answers

[Robbs]

Forgott to say that When in idle the car studders with around 13afr but When i go down to around 11-11,5 afr it runs great on idle :/ if i get near 14,7 it studders alot. Im going crazy.

[Matt]

More information required...

I have a problem with my new car r33.

Are you using a modified Z32 300ZX ECU or HCR32 ECU?

Here in sweden we have to have exakt right gases from the exaust and i got the wrong values.
need to get under 100 hc and 1,03 lambda

How was it running _before_ making more modifications like adding the Q45 MAF and 850CC injectors? Did you get it running right first with factory R33 MAF and factory 370CC injectors before doing these other modifications?

Q45 maf? name? counts air
Q45 throttle house? dont know the names.
Sard 850cc injectors, used to run 50%gasoline and 50%e85 before

So you changed to Q45 MAF in Nistune and resized injectors from 370CC to 850CC?

I think my kconstant and latency is wrong. It is low from what i have read that it should be.
My kconst is 143
inj latency 940
volt latency 204

We can tell you once I know what ECU you are currently running

Can i messure the maf to see if its broken?
Something with the throttlehousing?

We cannot tell you these things on the forum. You would have noticed these problems if doing the modifications one step at a time, and then when something broke you would then know.

At this point of time we dont know what ECU you are using, if the car was running okay before your modifications (or when the ECU was Nistuned) etc. There are too many variables which could be causing your issue (including but not limited to air leaks, bad MAF etc)

Log of AFRs and tune file posted here may also be helpful

[Robbs]

Hi matt Thank you for answers.
I have the z32 300zx ECU.
I bought the car like this so im sorry, i havent got it running with original parts.
I changed maf and injectors in nistune. I pressed original 370cc before change.Thank you for helping me.

I logged some today, i dont know what you whan tto see and my mapp also. Anyone with a comment please feel free.

[Robbs]

aah my first map was not saved with other logs

[Robbs]

Could it be that i just got to big injectors? 850cc, it was 50/50% gas vs E85 before. Maybe it dosent work with that big injectors with gasoline with around 330hp? I Will try to do 50/50 tomorrow and see if it gets bryter. Takes time to get some answers and if My car burns up i dont get anything right Now:(

[Robbs]

Fixt it so i got it approved. Is a litle bit to rich Now but thats better then lean. Ty

[bachig24u]

hc usually goes up if the mixture is very far lean or rich.

e.g if fuel/air mixture is above >1.2 lambda or especially too rich like <0.9

check catylist in the exhaust. make sure it hasn't been removed. it will help by 20 hc points or more.

[Robbs]

Yes thx. I got it fixed. I changed Map for E85 again and fixed some other stuff. Im going to tune à bit tomorrow. Now lambda is around 0.85 on highway. I think i Will set it at around 0,95.? Lambda should be same with E85. Ty

[bachig24u]

yes it is, lambda is lambda no matter what fuel is used (finally a standard we can all use).

keep in mind that if your engine is using crank case recirculation system,
must use a low ZDDP oil or an ethanol friendly oil or the exhaust catylist won't last too long.

[Robbs]

yes it is, lambda is lambda no matter what fuel is used (finally a standard we can all use).

keep in mind that if your engine is using crank case recirculation system,
must use a low ZDDP oil or an ethanol friendly oil or the exhaust catylist won't last too long.

Ok thanx. But i dont have the catylist on anymore is it ok then?