Hi Hondata,
If the engine is cold (in the morning) in low rpm and speed-up it is a little bit jerki to drive. But if I reach ~2.600 rpm all is normal.
Any idea which option I must tune to fix the "jerki" speed-up? I think all is default at the moment because I don't know which setting I must adjust.
It is this option?
Fuel > Air temperatur compensation
>> Air temperature fuel compensation low flow
IAT (°C) = defaults...
Trim (%) = 0.0 (default)
>> Air temperature fuel compensation medium flow
IAT (°C) = defaults...
Trim (%) = 0.0 (default)
>> Air temperature fuel compensation high flow
IAT (°C) = defaults...
Trim (%) = 0.0 (default)
MAP:
FN2_Rotrex_v8_final.fpcal:
https://www.hondata.com/forum/download/file.php?id=7490
Thanks for help and give me the tip.
General question: Engine is cold = jerki on slow speed-up only on low rpm
Re: General question: Engine is cold = jerki on slow speed-up only on low rpm
Don't change the fuel compensation tables without determining if the main fuel tables are correctly tuned and your fuel trims are low. If you post a datalog of the problem then we'll look at it.
Hondata
Re: General question: Engine is cold = jerki on slow speed-up only on low rpm
Hi Hondata,
see attached files below.
Thanks for help.
see attached files below.
Thanks for help.
- Attachments
-
- cold_speed_up.fpdl
- (305.14 KiB) Downloaded 194 times
-
- FN2_Rotrex_v11.fpcal
- (16.26 KiB) Downloaded 193 times
Re: General question: Engine is cold = jerki on slow speed-up only on low rpm
The fuel trims indicate that the tuning is rich by about 10%. I'd fix that first. If it runs ok with AFM tuning as it is then I'd first check that the AFM housing is secure and there are no leaks around the air flow meter. Sometimes even a small rotation will make is read differently. Then I'd either apply a fuel trim or re-tune the AFM table to reduce the fuel.
Hondata
Re: General question: Engine is cold = jerki on slow speed-up only on low rpm
Thanks for your answer.
Ok I will check the fuel and I will re-test again.
The air intake to the supercharger is stock - normally all is secure and closed (tight?) correctly.
Only a Scoop-in after the airbox is installed to get cold fresh air.
Ok I will check the fuel and I will re-test again.
The air intake to the supercharger is stock - normally all is secure and closed (tight?) correctly.
Only a Scoop-in after the airbox is installed to get cold fresh air.
Re: General question: Engine is cold = jerki on slow speed-up only on low rpm
The scoop-in is installed before the airbox!typer86 wrote:Thanks for your answer.
Ok I will check the fuel and I will re-test again.
The air intake to the supercharger is stock - normally all is secure and closed (tight?) correctly.
Only a Scoop-in after the airbox is installed to get cold fresh air.
Do you have installed the scoop-in before the supercharger-conversion or after the supercharger-conversion?
Komotec have tuned your car?
The tuning from Komotec/Honda Reis are very bad!
I would suggest a fully retune by a good tuner like Vitviper for example!
Last edited by R-12914 on Fri May 29, 2015 12:51 am, edited 1 time in total.
2008 Honda Civic TypeR FN2
Rotrex C30-94 supercharged with relocated IAT
Powered by ASNU 092/FP330E fuel pump & ASNU 090/750cc fuel injectors
------------------------
ECU: 37820-RSP-E02
Flashpro: FP-SI-INT-21153
Software: 3.6.1.0
Firmware: 185
Rotrex C30-94 supercharged with relocated IAT
Powered by ASNU 092/FP330E fuel pump & ASNU 090/750cc fuel injectors
------------------------
ECU: 37820-RSP-E02
Flashpro: FP-SI-INT-21153
Software: 3.6.1.0
Firmware: 185
Re: General question: Engine is cold = jerki on slow speed-up only on low rpm
Yes I will contact him soon. Before I will damage the engine.
I don't know which settings I must increase/decrease to make the engine lean/rich in MAF setup. :-(
So I will pay money again again and again.........
I don't know which settings I must increase/decrease to make the engine lean/rich in MAF setup. :-(
So I will pay money again again and again.........
Re: General question: Engine is cold = jerki on slow speed-up only on low rpm
Send me your calibration and 2 datalogs, one wot and one normal driving.
I will fix your fuel in a afm calibration
nunobmg@hotmail.com
I will fix your fuel in a afm calibration
nunobmg@hotmail.com
Re: General question: Engine is cold = jerki on slow speed-up only on low rpm
I have been keeping an eye on the datalogs and the map from him.
I think the s-trim is very far in the basement!
A retune at least the fuel in part throttle is necessary!
I think the s-trim is very far in the basement!
A retune at least the fuel in part throttle is necessary!
2008 Honda Civic TypeR FN2
Rotrex C30-94 supercharged with relocated IAT
Powered by ASNU 092/FP330E fuel pump & ASNU 090/750cc fuel injectors
------------------------
ECU: 37820-RSP-E02
Flashpro: FP-SI-INT-21153
Software: 3.6.1.0
Firmware: 185
Rotrex C30-94 supercharged with relocated IAT
Powered by ASNU 092/FP330E fuel pump & ASNU 090/750cc fuel injectors
------------------------
ECU: 37820-RSP-E02
Flashpro: FP-SI-INT-21153
Software: 3.6.1.0
Firmware: 185
Re: General question: Engine is cold = jerki on slow speed-up only on low rpm
Good morning all.
Yesterday I spent a lot of time to find to adjust the S.Trim setting in cold conditions in AF calibration.
The same problem occurs on my finial cal from komotec and from R-12914 (thanks again for your help!).
4 thinks adjusted:
- "water temperatur ignition retard" set all values from 15 to 0 - very important setting!
This setting eliminates the jerking if eninge is cold.
- Fuel Temperature Compensation:
> Water temperature fuel compensation cranking:
>> ECT (C°) 82°: set to: -80,9 = Better start if engine is hot
>> ECT (C°) 102°: set to: -81,1 = Better start if engine is hot
- VTC Parameters:
> Use VTC tables upon decel fuel cut = activated
>> Cam angle low: cam angle values adjusted to smooth shifting in low rpm. (Before two tables was set to zero lagging after shift in low boost was the result)
- Throttle:
Better course in throttle plate from mid to high range
- Ignition > Individuel cylinder ignition trim
> Cylinder 2, 3 set to -1
Edit:
Calibration and Datalogs attached
@ Hondata please check if tuned OK.
Maybe the individual cylinder ignition trim could be advanced for cylinder 1 or 4 but i am not sure.
Thanks for all!
Driving with this calibration is very smooth in city and powerfull for a quick sprint!
Yesterday I spent a lot of time to find to adjust the S.Trim setting in cold conditions in AF calibration.
The same problem occurs on my finial cal from komotec and from R-12914 (thanks again for your help!).
4 thinks adjusted:
- "water temperatur ignition retard" set all values from 15 to 0 - very important setting!
This setting eliminates the jerking if eninge is cold.
- Fuel Temperature Compensation:
> Water temperature fuel compensation cranking:
>> ECT (C°) 82°: set to: -80,9 = Better start if engine is hot
>> ECT (C°) 102°: set to: -81,1 = Better start if engine is hot
- VTC Parameters:
> Use VTC tables upon decel fuel cut = activated
>> Cam angle low: cam angle values adjusted to smooth shifting in low rpm. (Before two tables was set to zero lagging after shift in low boost was the result)
- Throttle:
Better course in throttle plate from mid to high range
- Ignition > Individuel cylinder ignition trim
> Cylinder 2, 3 set to -1
Edit:
Calibration and Datalogs attached
@ Hondata please check if tuned OK.
Maybe the individual cylinder ignition trim could be advanced for cylinder 1 or 4 but i am not sure.
Thanks for all!
Driving with this calibration is very smooth in city and powerfull for a quick sprint!
- Attachments
-
- R-22837_MAF_Rotrex_FN2-v4_final.fpcal
- (16.36 KiB) Downloaded 182 times
-
- datalog0007.fpdl
- 20 minutes driving
- (2.45 MiB) Downloaded 183 times
-
- datalog0006.fpdl
- 3rd gear pull
- (80.47 KiB) Downloaded 172 times