So i installed a gm 3 port boost solenoid and flashed my ecu with the base map tom from tscomputuned gave me. i previously has a greddy profec b ebc installed in my car. i actually wired the new 3 port to the ebc and everything worked fine. i realized i didnt wire it to the stock wires so i rewired it the the stock wires like it should be. The weird thing about it is that when I wired the gm 3 port to the greddy profec b ebc it works perfect and doesn't act strange on boost at all. When it's wired the correct way when I get into full boost the car like shakes and rocks its weird as if boost is going on and off? its hard to explain but I did not wire a resistor into the GM 3 port do you think that could be causing my problem? Any suggestions would be great. Thanks

 

Obviously something is either messed up with your wiring or tune. I'd give tom a call or email.

 

There are many not running the resistor, I've actually ran mine both ways and couldn't tell a difference.

 

alright well here is a video I recorded earlier today to show whats going on. Its like once boost comes on it cuts in and out over and over again. Need help.. Why the hell would everything be fine and smooth when i have the gm 3 port pig tail wired to my greddy profec b boost controller but acts all stupid and cuts boost in and out when its wired to the stock ecu??? ANY HELP PLEASE THANKS!

 

bump

 

what are u using as boost source?

 

I'm using the nipple on the turbo as the boost source

 

how exactly did you wire the 3 port into the greddy ebc? Were the logs that you sent to tom for the base map, logs with the 3 port installed already? Are you sure the tune is for the 3 port?

 

This happened to me when I started tuning my 3-port. I assume you're running Tephra if it came from tscomp, you need to look at the global boost section under always keep 100% wgdc under specified load. What is that load threshold set to? I'd bet you WGDC is not high enough to keep you above that load threshold. So what it is doing is holding 100% wgdc to that threshold, then going to your map wgdc, drops below the threshold because the duty cycle isn't high enough to keep you above the threshold, and jumps it to 100% until above the threshold. It will go back and forth, back and forth, fighting itself.

 

Most certainly has to do with your tune, there is something perhaps overlooked.
That's why with the ebc no problems and with the stock ecu you have a problem.
Its not wiring related. 9 times out of 10, software issue in a case like this. (personal experience)

 

In ecuflash my max wategate duty cycle # 1,2,3 and 4 tables are all set to 100% for all rpms.

I have another table the says WGDC=100% under this Load and its set at 200%

 

nothing is being overlooked on my end. ive done hundreds of cars on 3 ports with no issues.

i did once have a customer that wired his 3 port up backwards though and 0% wgdc = was actually 100% and vice versa.

also your WGDC table does not exceed 52% at redline on the main table right now.


ill trouble shoot this issue with the customer and let you guys know what it is once we figure it out.

 

I hope you didn't take what I said as suggesting you overlooked something. Just simply had a similar situation until I started reading through my logs as I began learning to tune mine. I'm interested in what the cause is though.

 

not at all. I'm just implying i don't feel its in the rom causing the issue. i will certainly update and let you know what the issue is once we figure it out. i am going through troubleshooting steps right now with him.

I am thankful you guys actually are here to help him to begin with, because sometimes i don't have time to trouble shoot cars right away.

 

Tom to the rescue!