Hondata

I just hooked up a brand new mac boost solenoid and ran into problems.

I have a 6 pound spring and started adjusting it at 0% duty cycle which should be off the spring but when i drive it around it boost past 6 and hits boost cut which is set at 10lb. I disconnected the power wire and it ran fine off the gate. i double checked my wiring and rewired the 12v to the fuse box with same problem. all my wiring connection is soldered and all my vacuum hose is good.

followed the hondata instructions on how to plumb the vacuum line. port 1 of the solenoid goes to the bottom of waste gate t into the compressor housing, the number 2 port runs to the top of the waste gate and the 3rd port is left open. the 1 wire from the solenoid is wired to a 12v switch and the 2nd wired to the ecu pin A7 obd2a.

I do have the pwm boost component soldered in.

settings:
-enabled a11
-solenoid normally closed
-fix duty cycle 0%
-activation pressure 3psi
-solenoid frequency 31hz

car:
96 civic hatchback
d16y8
t3/t4 spooling performance turbo setup

here's the data log. i only took it up to 8.9 psi and backed off

Set your activation pressure to 1 kPa, key the ignition on, and check for the solenoid making a buzzing sound. If not, it's the components or wiring. If so, then blow air into the line from the wastegate bottom port and check that the solenoid is closed to that port.

Also try values other than 0% and 100%

Hondata wrote:Set your activation pressure to 1 kPa, key the ignition on, and check for the solenoid making a buzzing sound. If not, it's the components or wiring. If so, then blow air into the line from the wastegate bottom port and check that the solenoid is closed to that port.

no buzzing sound and also port number 1 that goes to the bottom of the wastegate is closed

What boost level do you reach without the solenoid installed running off the wastegate?

Spunkster wrote:What boost level do you reach without the solenoid installed running off the wastegate?

it was running 6psi off the gate before the solenoid was installed. and also with the solenoid plumbed it ran fine at 6 psi without the wires hooked up.

i tested both wires and they both read 12 volt is this normal??

Have you tried a duty cycle other than 0%?

nope not yet. i tested the solenoid shooting 12volts and it does open the valve allowing air to flow through. Ill try adjusting the duty cycle and see what it does.

Spunkster wrote:Have you tried a duty cycle other than 0%?

thanks once again spunkster playing with the duty cycle worked

was playing around this weekend with my map, and set the duty cycle to 0%. my boost also raised up to 18 psi(pwm output was at 0 in the log!). with 10% i just have the 7 psi of my wg spring. was driving around last week with 35% @ 10 psi. something must be wrong again in the software!!

Don't use 0%. If you want to disable it, then just disable it in the software.

Wolli wrote:was playing around this weekend with my map, and set the duty cycle to 0%. my boost also raised up to 18 psi(pwm output was at 0 in the log!). with 10% i just have the 7 psi of my wg spring. was driving around last week with 35% @ 10 psi. something must be wrong again in the software!!

from my understanding the mac solenoid works between 10-90% duty cycle 10% being lowest boost and 90% highest boost

it can´t be the valve. no power to the valve->closed. that´s the meaning of "normally closed". so it has to get some power, to switch to open. i allready had a very bad experience cause of the boost control, and it almost happened once again. so what is the real reason for that, spunkster?