Car idles 11.3 AFR with K value=0 and Latency=70 us !?!

John · Post by **John** » Wed Aug 19, 2009 7:07 pm

Hi

Was helping a friend to tune his car yesterday, ca18det with nismo pink 555cc. nothing I did made the car run lean as the topic reads i had the K value at 0 and the latency down to around 70 us and the dam car still ran rich during idle and when revving.

The only thing the car seem to respond to is when I lowered the TTPmax to around 0 then the AFR started to read up towards 18 and the car would sputter and die. I noticed that just changing the highlighted cell in the TTPmax table didn’t do it I had to change the whole series of cells up or down to get a response from the Inj time.

I have asked him to change back to the skyline 440cc injectors and we will have another go at it tomorrow, Il report back then.

There is something very fishy with the TTPmax and min tables in Nistune.

Regards

John

Matt · Post by **Matt** » Thu Aug 20, 2009 1:57 am

put this in your C:\Program Files\Nistune\Address directory

TTPMin will be proper values then. Its actually 1/10 of the displayed values and I've fixed it for the next release

Whats your injector pulsewidth? I maanged to get 0.6ms with 0 latency, lowest k constant and TTPmin set to 0

TM_S13 · Post by **TM_S13** » Thu Aug 20, 2009 4:35 am

Sorry to highjack this topic but, Matt I'm getting an error message when I use that new address file... unless I need to run the latest beta version... I'm using the 0.9.6b version... gonna try and install the latest version...

edit: problem solved, updated to latest beta version.

Anders_r · Post by **Anders_r** » Thu Aug 20, 2009 8:06 am

John wrote:Hi

Was helping a friend to tune his car yesterday, ca18det with nismo pink 555cc. nothing I did made the car run lean as the topic reads i had the K value at 0 and the latency down to around 70 us and the dam car still ran rich during idle and when revving.

The only thing the car seem to respond to is when I lowered the TTPmax to around 0 then the AFR started to read up towards 18 and the car would sputter and die. I noticed that just changing the highlighted cell in the TTPmax table didn’t do it I had to change the whole series of cells up or down to get a response from the Inj time.

I have asked him to change back to the skyline 440cc injectors and we will have another go at it tomorrow, Il report back then.

There is something very fishy with the TTPmax and min tables in Nistune.

Regards

John

i had some problem with that too.. cut the lambdasensor =) unplug contact and try again

Anders_r · Post by **Anders_r** » Thu Aug 20, 2009 8:07 am

Matt wrote:put this in your C:\Program Files\Nistune\Address directory

TTPMin will be proper values then. Its actually 1/10 of the displayed values and I've fixed it for the next release

Whats your injector pulsewidth? I maanged to get 0.6ms with 0 latency, lowest k constant and TTPmin set to 0

does i need this too? or every ca18 ?

Matt · Post by **Matt** » Thu Aug 20, 2009 12:36 pm

every CA18DET should use this address file

John · Post by **John** » Thu Aug 20, 2009 7:20 pm

Matt wrote:put this in your C:\Program Files\Nistune\Address directory

TTPMin will be proper values then. Its actually 1/10 of the displayed values and I've fixed it for the next release

Whats your injector pulsewidth? I maanged to get 0.6ms with 0 latency, lowest k constant and TTPmin set to 0

Great Matt! I will try it tonight. Just put the file in the Adress directory or should I in Nistune do "File -> Open adress file" and select this as well?

Injector PW when running rich was something like 2.8ms then when changing the TTPmax down the PW whent down to around 1.6ms befor the car died, but it was so unstable i dont know realy.

I will record a logg file tonight and post it here.

Cheers!

/John

TM_S13 · Post by **TM_S13** » Fri Aug 21, 2009 12:05 am

if you just replace the old file with that new one, I think you won't have no problems

Matt · Post by **Matt** » Fri Aug 21, 2009 12:53 am

Just drop that address file in the directory... you dont need to reload since the S13_CA18DET address file includes this base CA18 address file

Yes I need to get the next version out with this change in so everyone has it... just trying to finish a few things and test before I do that (including logworks 3 updates)

John · Post by **John** » Fri Aug 21, 2009 8:16 pm

Status update.

The new adress file made the car react more to the changes but when driving on the road strange things started to happen and after a lot of trouble shooting I condemned his fuel pump to HELL!!, it couldn’t deliver enough pressure so nothing really got done in Nistune

His fixing a new pump and we will probably be at it again next week.

Regards

John

Anders_r · Post by **Anders_r** » Fri Aug 21, 2009 9:41 pm

was i the pump? shoudlnt the car run lean if its pump?:P

John · Post by **John** » Fri Aug 21, 2009 11:59 pm

Anders_r wrote:was i the pump? shoudlnt the car run lean if its pump?:P

The problem we had with the idle could be a mix of both the pump not giving correct pressure and the TPmin values. Yesterday with the new address file I think i got a bit closer to 14,7 at idle but when going on boost and AFRs just getting higher the more injection time I added it didn’t seem worth it to bother with the idle until the new pump is fitted.

/J

Anders_r · Post by **Anders_r** » Sat Aug 22, 2009 1:37 am

Ye i order a new pump to

my pressure failed from 2,5 to 1,6

DeJi · Post by **DeJi** » Fri Apr 23, 2010 4:02 am

do I need to re-tune the fuelmap if I install this address file?

TM_S13 · Post by **TM_S13** » Fri Apr 23, 2010 6:18 am

why would you use this address file when a more recent one is present with the latest software release ?

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Car idles 11.3 AFR with K value=0 and Latency=70 us !?!

Car idles 11.3 AFR with K value=0 and Latency=70 us !?!

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Re: Car idles 11.3 AFR with K value=0 and Latency=70 us !?!

Re: Car idles 11.3 AFR with K value=0 and Latency=70 us !?!