hot start, post start lean problems

92hb_hb · Post by **92hb_hb** » Tue May 08, 2007 7:38 pm

okay..

I now have my 02 and wideband hooked up on my DP.. on hot starts, it stills runs lean, around 18-19.. for the IAT corr, I had to add about 10% fuel @ 159 degrees, to help bring the AFR's down..

btw, i snipped the analog 1 signal from my LM1 to the ECU harness so it doesn't affect the 02 signal.. BTW, i also connected the ground wire from the LM1 to the ground wire on the ECU harness too..

b20luda · Post by **b20luda** » Tue May 15, 2007 9:35 am

i have been having simular issues with my car but it does it mostly on cold start, mine will go to 18-19 then come back and idle smooth at low 14 afr i havent been able to figure it out yet either :(

crucian · Post by **crucian** » Fri May 25, 2007 11:42 pm

I've been having the same problem during hot starts. What I did was watch my IAT at idle and adjusted in the block where the IATs were closer to till my AFRs changed. Car seemed to like it. But I found myself adding a big percentage of fuel.

92hb_hb · Post by **92hb_hb** » Sat Jun 09, 2007 9:38 pm

I am beginning to think my board is defective.. THis never happened w/ my s200..

I"m going to have to find someone who has a s300 board and test it against mine..

Lococoin · Post by **Lococoin** » Mon Jun 18, 2007 7:28 pm

My car does the exact same thing when its heat soaked. Air fuels around 18-19 barely running. My friends does the same as well. It has to be an s300 software issue, otherwise we wouldnt all be having the same problems.

Tchleung · Post by **Tchleung** » Sun Jul 15, 2007 11:13 pm

Just to chime in, I'm having the same problems too. I find if I turn the car off, and turn it back on within 5 minutes. It's no problem. But anywhere from 5mins to 15 mins it'll keep cranking the motor and not fire till about 10 cranks then run lean till it richens up after about 5 mins later. I find if the car sits for over 15 mins, it starts jsut fine as well. It's only when you turn the car on after sitting between 5 to 15 mins for me. Any other time is mint.

joeb · Post by **joeb** » Wed Jul 25, 2007 6:46 pm

Tchleung wrote:Just to chime in, I'm having the same problems too. I find if I turn the car off, and turn it back on within 5 minutes. It's no problem. But anywhere from 5mins to 15 mins it'll keep cranking the motor and not fire till about 10 cranks then run lean till it richens up after about 5 mins later. I find if the car sits for over 15 mins, it starts jsut fine as well. It's only when you turn the car on after sitting between 5 to 15 mins for me. Any other time is mint.

My s200 does exactly the same thing. I was planning to upgrade to the s300 but im hesitant.

Post by **Spunkster** » Thu Jul 26, 2007 10:10 am

Aside from one calibration posted in April, there have been no calibration AND datalogs posted showint the problem that we can look at with the calibration that generated it.