Starting Trouble After Reflash

[TXZ0603]

Anytime I flash some adjustments into the tune, regardles what it is, it takes between 15-40 tries to restart the car. I am in OLSD and I clear trims for giggles every time, yet still takes forever. Starts fine after it finally decides to start. Never a problem again until i flash a new tune. Any ideas?

03 TT Z06
3bar SD

******* Tune in post 7 *******

[TXZ0603]

well all ive changed latley is the VE, so airflow is still te same as the last flash. Just dosnt make any sense as to why it would take so many tries to start a car.

[Frost]

Are you doing a write entire or just updating the cal data?

[TXZ0603]

Thanks for the responses. Frost, I am only doing a cal update. Slow, sorry if my post sounded unappreciated of assistance. After re reading it I can see where it might. Just racking my brain with a crap load of starting. I will do a RAF scan tomorrow and see how far off it is from where I am at now. Possibly that is skewing the start up some.

Finally got my tune to load

[Bill@HPTuners]

maybe try checking the ses enable boxes for 101, 102 & 103, maybe the pcm isn't failing into SD mode properly.

[LSxpwrdZ]

I didn't think it was fully necessary to fail the MAF sensor codes when using a custom SD OS? Reason I say that is cause I didn't on my Camaro and I had the MAF table zeroed out and it still ran fine on SD. Maybe the OS's are a little different from one to another.

How does the car act when it's cranking? Does it try to fire and stumble or is it just cranking and then all of the sudden fires up and runs?

[miker2]

you've got those maf codes set to fail on 2nd error--should be set to 1st.

[TXZ0603]

I didn't think it was fully necessary to fail the MAF sensor codes when using a custom SD OS? Reason I say that is cause I didn't on my Camaro and I had the MAF table zeroed out and it still ran fine on SD. Maybe the OS's are a little different from one to another.

How does the car act when it's cranking? Does it try to fire and stumble or is it just cranking and then all of the sudden fires up and runs?

Wen just flashed, ait will crank, hook and die. When it finally does run, it will hook studder almost die revup a lil then settle down and all is well. Any time after that it is fine.

No problem, just trying too help. I can see from your tune that the ve still needs work as you are working on it still. As Bill said, check ses under DTC. I would log IAC as well as airflow pids. Keep an eye on dynamic and desired airflow.

Ill check the codes on the new flash after this. But wont that only show a MIL light?

you've got those maf codes set to fail on 2nd error--should be set to 1st.

Thanks for noticing that. will set them to 0 on next flash.

Here is this mornings RAF scan. There are some refrence pics as well.

[Bill@HPTuners]

you've got those maf codes set to fail on 2nd error--should be set to 1st.

No they are set to 2-no mil light, not 2nd error, very different. However all of the ses enables were unchecked so its worth a shot to check them, not sure if it'll fix it but I'm just guessing at this point.

[TXZ0603]

OK guys, I havnt changed the tune yet so it will be a fair comparison. Current tune is in post #7' I did do a new log with added PIDs in the table. Here is the new scan:

here is my WB PID

WB

unit: afr

function: ([PID.2811]/0.480287467)+9

[TXZ0603]

TB is a shaner port and polish job. Ill give that one a try and post log in the am. Car is warm right now. Thanks for the help.

Should I put the exact RAF from the scanned into the tune or leave it as it is?

[TXZ0603]

what or where should I scale? I have not had to do that yet so Im lost on it.

[TXZ0603]

Still the stock sized. 78mm?? Not sure how much the opened it up. As far as I know, it was ported to smooth out airflow

[TXZ0603]

Ill give it a shot here in a few minutes. Should I change the RAF to the scanned value or leave it as is?

[TXZ0603]

Heres the RAF scan.

[TXZ0603]

Starts fine after a 30 sec or how ever long actually. Its the initial startup, however its getting better. 5 starts vs 20-30+ is a world better.

Should I add in the RAF or work on the VE in the idle area to get the STIT and LTIT in check? It does idle a little rich. 12-13xx afr

[TXZ0603]

cool. will post up a new one tomorrow. got to get kids ready for bed and school in the am. Thanks for all the help!!!

[miker2]

No they are set to 2-no mil light, not 2nd error, very different. However all of the ses enables were unchecked so its worth a shot to check them, not sure if it'll fix it but I'm just guessing at this point.

hey bill---help.went back and checked the help file,but no info. will the "2-no mil setting still fail the maf for speed density os ?

[miker2]

if you failed maf, set to no mill and you will be fine

yeah,i know that.what i'm asking is whether the setting in this guy's tune will work also.

[Frost]

You can't do much better than the first pic, so no need try... Remember, there are other variables that are [mostly] outside of your control such as VE bias error and more, not to mention the limits of the precision and accuracy of your wideband.