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boost by gear PWM problem
Posted: Fri Jul 10, 2009 9:06 pm
by billy_bad_a$$
Boost by gear is only working in 1st and half of 2nd then nothing. I have attached the datalog showing PWM works like its suppose to then half way thru 2nd it goes to 1%. This happened on both of my passes and I cant figure it out. please help as I have a race the day after tomorrow and need this fixed.
Posted: Sat Jul 11, 2009 5:25 pm
by billy_bad_a$$
I guess nobody can help. Dont know if it matters but I have a hondata solenoid.
Posted: Sun Jul 12, 2009 3:49 pm
by locash
Can you post the calibration? This might help..
Posted: Sun Jul 12, 2009 3:55 pm
by locash
On a side note, you are maxing out the PWM duty cycle as well, which is probably your problem.. What gate springs are you running, what turbo, etc?
Posted: Mon Jul 13, 2009 7:39 am
by billy_bad_a$$
locash wrote:Can you post the calibration? This might help..
how do I post the calibration?
Posted: Mon Jul 13, 2009 7:40 am
by billy_bad_a$$
locash wrote:On a side note, you are maxing out the PWM duty cycle as well, which is probably your problem.. What gate springs are you running, what turbo, etc?
cant remember what springs are in there but we are changing them this week and im running a gt4088. we had it so the pwm should only run 99% at the most but I guess thats cutting it too close and its spiking?
Posted: Tue Jul 14, 2009 9:45 am
by billy_bad_a$$
Ok I guess nobody knows what the problem is. Thanks anyway
Posted: Tue Jul 14, 2009 9:55 am
by Spunkster
You haven't posted the calibration you are using.
Posted: Tue Jul 14, 2009 10:52 am
by billy_bad_a$$
I don't know how to. I am not the tuner just the owner. I asked how to do it so I could.
Posted: Tue Jul 14, 2009 10:55 am
by Spunkster
Post it the same way you posted the calibration. If you don't have the calibration contact your tuner and have them email it to you.
Posted: Tue Jul 14, 2009 3:10 pm
by billy_bad_a$$
my tune
Posted: Tue Jul 14, 2009 3:35 pm
by Spunkster
Look at your air temp compensation table while looking at the datalog and you will see that you are adding 2% duty cycle to the 99% you already have set whihc bsically makes it go back to 1% (99 = 2 = 101%) and excedeing 100% cannot occur. Either remove the compensation correction or you may need to increase the wastegate spring pressure.
Posted: Tue Jul 14, 2009 4:11 pm
by billy_bad_a$$
Good call. Thanks a lot for your help