pwm problems

alpha earl · Post by **alpha earl** » Sat Apr 11, 2009 12:35 pm

set up my pwm on s300 and can not get it to control the boost, it just spikes no matter wether its set on normally open or closed and at 0 and 100% duty cycle for both settings

i have top port of wastegate going to #2 on the mac valve and #1 goes to vacuum reference

can someone help me here??

everything is installed correctly in the ecu also

and one wire goes to a11 and the other goes to switched power

alpha earl · Post by **alpha earl** » Sun Apr 12, 2009 9:49 am

has anyone else had this problem, or does everyone run the gm boost solenoid

Martian · Post by **Martian** » Sun Apr 12, 2009 4:33 pm

Do you have it on A11 as Hondata lists it, or as Honda Lists it?
http://www.hondata.com/help/smanager/index.html[/url]

boostedcivicsir · Post by **boostedcivicsir** » Sun Apr 12, 2009 6:32 pm

stupid question but where is the bottom port on the wastegate goin?

alpha earl · Post by **alpha earl** » Sun Apr 12, 2009 8:15 pm

bottom port on the wastegate is going to a vacuum block, and the #1 is tapped into that same line, tried giving #1 off solenoid straight to the vacuum block and had same results

and yes it is connected to a11

Post by **Spunkster** » Mon Apr 13, 2009 12:14 pm

Is this a Hondata boost control solenoid?

alpha earl · Post by **alpha earl** » Mon Apr 13, 2009 1:55 pm

it is the mac valve:

Post by **Spunkster** » Mon Apr 13, 2009 2:51 pm

It may be the wrong solenoid.

Try other settings rather than 0 and 100%. Try 10% as a starting point and start ramping it up from there

alpha earl · Post by **alpha earl** » Mon Apr 13, 2009 3:34 pm

Basically it will start to cycle the solenoid around 15% duty then peak at around 50%, then it will drop off at any higher duty cycle.

alpha earl · Post by **alpha earl** » Wed Apr 15, 2009 12:03 pm

anyone? i would hate to switch to a different management system just because i couldn't get the pwm to work

Post by **Spunkster** » Wed Apr 15, 2009 1:43 pm

http://www.hondata.com/forum/viewtopic.php?t=3772

alpha earl · Post by **alpha earl** » Thu Apr 16, 2009 4:35 pm

well decided to mess around a little bit, turns out the solenoid makes 100% boost at like 10% duty cycle normally closed, and makes wastegate aroud 50%

set it at 45% and boost went up 2lbs :), turned it to 40% and it went up another 2 or so from the 45%

just seems hondata doesn't have it setup so the frequency's are spread out, maybe it has something to do with their hertz/frequency for the software to control the solenoid

but anyways i figured it out and can finally get a tune and turn up the boost :)

Martian · Post by **Martian** » Fri Apr 17, 2009 3:18 am

Sounds like you have a normally open solenoid to me. otherwise decreasing duty would decrease boost.

rudebwoy · Post by **rudebwoy** » Sat Apr 18, 2009 6:06 am

try switching the options:
you have 2 options maximum boost at 0 % duty/normally open,
and maximum boost at 100% duty/normally closed.
I have the same solenoid, and I have to select normally open to get it to work when I am using boost by gear option or it will spike.

if thats not the probelm you have something hooked up wrong.

alpha earl · Post by **alpha earl** » Mon Apr 20, 2009 6:57 pm

Martian wrote:Sounds like you have a normally open solenoid to me. otherwise decreasing duty would decrease boost.

they are all the same solenoids so i dont see why one would be normally open and the other normally closed

that still doesn't explain the lack of adjustability, the window for the pwm is just too small as if the solenoid isn't what the program is intended for