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

ecu components installed by j-k tuning

 

John and I have seen instances where the ECU ends up leaving A11 grounded all the time as a hardware complication. Check to see if that's the case by making sure your solenoid is clicking when you apply duty cycle through the software.

 

john is the one who is having troubles with it with me, we have tried everything, 2 different ecu's... just sucks

 

Ya, it's happened to more than just you guys. That's definitely the issue if it's not operating the solenoid at all.

 

Do you still have a boost source to the bottom port?

 

I bench test every ecu with an led now to ensure the pwm system is properly working before sending it to customers.

Perhaps you can have John Kerr do the same for you. Good luck!

 

I believe he has been since the original unit we found with a problem quite some time ago, which means this may have happened after it shipped for whatever reason. Either way, I'm sure he'll take care of this for you.

 

I test all of them in my personal car before I ship them out

The unit IS controlling the solenoid and it is NOT grounding out all the time.

I think the problem is the solenoid itself. We are switching it to a GM solenoid instead of the MAC valve.

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.

So the ecu is responding atleast some what to the changes. So GM solenoid it is and we will go from there.

I am just unsure why it is having an issue. I have used a MAC valve with the S300 before and didn't have any issues with it.

 

its because im cursed

and thanks for everything john, couldn't ask for a better tuner/friend

any other insight would be helpful

 

Just figured I would give the idea of testing with an led :-)

 

I actually have been testing with an LED for a while. But just to make sure absolutely everything works I test them in the car.

I test bench them to confirm the chipping was good and if I wanted to can test any of the ground outputs via the LED.

But thanks for looking out.

 

i had this problem with ectune and i found that the boost would spike at 0 or 100....you need it either 10 or 90 and go from there....that worked for me

 

 

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

 

I believe they're set to one frequency, but I was under the impression that it was the MAC valve's frequency, since they sell them.

 

Ive had another local tuner have a similar problem with S300 with a PWM setup I installed in the ecu. There was a very fine window to tune the duty cycle in. Otherwise the boost would go nowhere or it would spike very high. Ill have to see if he ever figured it out for future reference. I do know he put the solenoid on another vehicle and it worked fine with an S300. Maybe its just wiring issues with the car possibly.

Just as some vehicles I tune work great and others I have problems with RF noise and datalogging issues. This happens on all the systems(Hondata, Neptune, AEM).

 

ya my datalogging works perfect sometimes and shitty most the time lol

 

now on the hondata forums they are trying to tell me that because i did not buy "their" mac solenoid thats the reason its behaving like it is, saying that my solenoid is different than theirs somehow

 

Im pretty sure that all the solenoids that are rebadged from Hondata, ECtune, AEM, Turbosmart, Apexi etc. are all the same MAC solenoid valve just rebadged and they all operate at the same frequency. Most of the time the solenoid wont even start working until about 15-20% and maxes out around 85-90%. This is all if the software is setup right and 0% is wastegate and 100% is max boost.

 

ya, all the are mac valves with the same numbers and hondata tried saying they are not the same