hot start lean spot

[poulina]

howdy, I get a really lean spot on my hot starts, doesn't happen cold. vehicle drives great. any help is appreciated

2nd dyno maf21 trans CATheatoff minair10 dfco off brafetcmult.hpt

lean hot start.hpl

[hjtrbo]

To start with take 0.5g out of your start up air at the hot temperature. Get this bit right then look again to see if it's still out. Add IVT, Minimum airflow, Engine runtime and Engine off time to your scanner.

[poulina]

I will take some g/s out of the startup airflow table (ecm 12194) and see what happens, this table is only referenced for 4 seconds after startup?

something to note in the log posted above; the peak of the lean spot is at about 11 seconds of run time. thanks

I do not have min air listed as a channel in my pid list.

[GHuggins]

Might want to log trim errors against tip temp and dial in tip temp table too.

[hjtrbo]

I will take some g/s out of the startup airflow table (ecm 12194) and see what happens, this table is only referenced for 4 seconds after startup?

something to note in the log posted above; the peak of the lean spot is at about 11 seconds of run time. thanks

I do not have min air listed as a channel in my thepid list.

Yes that's right. Your air is high to start with which it holds then it slowly bleeds off. In the mean time you're pulling a heap of spark. All of that will be contributing. Get that part closer then revisit your fuelling. It's a bit of a dance for a couple of tune iterations

[poulina]

Might want to log trim errors against tip temp and dial in tip temp table too.

Yessir that is something I noticed was flatlined also…I have a dyno appt on Tuesday I’ll get a good excuse why the tuner didn’t wanna put the time into dialing this table in lol. How does this table translate into a more refined tune? Thanks

[poulina]

Yes that's right. Your air is high to start with which it holds then it slowly bleeds off. In the mean time you're pulling a heap of spark. All of that will be contributing. Get that part closer then revisit your fuelling. It's a bit of a dance for a couple of tune iterations

Ty sir

[poulina]

Well just lowering startup airflow helped heaps. Appreciate the help! Will post a log here soon