Have you done the restrictor pill mod?

 

I am leaving for Thailand for three weeks starting next Tuesday. If anyone wants a JDM MAP sensor soon, please send payment as soon as possible so I can get a sensor in the mail to you by Saturday.

 

yes, it was boosting fine 22-24 psi until about a three weeks ago. Then I started noticing that the peak boost value wasn't what it used to be (around 20 psi), which set me off on the JDM MAP mod so I could log what's going on. It seems like there was something wrong with the car to start with, and it just got worse over time.

Question: if the problem was a boost leak, would the WGDC read 100% since the turbo is trying to compensate for the loss the best it can?

 

The boost control system would definitely try to push up the WGDC to try to compensate for a boost leak. Whether it would reach it would depend on the response time setting you're using. The stock value of 10 causes relatively slow response.

12 psi represents a pretty major boost leak though. I would think that you could hear it.

 

I still have the stock value, so that seems consistent with the log. I think I found the problem though: I did another leak check to a higher pressure this time (I only did 5 psi previously because all I had then was a small 12V compressor). When the pressure reached 10 psi I started to hear the leak, and by 15 psi it actually started to whistle ! It's right at the turbo somewhere, and it's not the coupler between the LICP and the turbo, so it might be one of the WGA lines? I didn't have time to keep at it right now, but I'll search some more when I get home tonight.

 

voidhawk - fix your TPS dude, 96% is not 100%

 

So do those WGDC numbers match your WGDC maps? What are you using for boost? Stock lines with upgraded pill or?


There is a max WGDC vs Coolant temp table. Looks like this:

20c - 0.0% WGDC
30c - 0.0% WGDC
40c - 0.0% WGDC
50c - 0.0% WGDC
60c - 50.0% WGDC
70c - 100.0% WGDC
80c - 100.0% WGDC
82c - 100.0% WGDC

And a WGDC Limit table (Cold engine/ CEL) that looks like this:

63% WGDC

also a Max WGDC Correction table that looks like this:

0 TP - 0 correction
13 TP - 0 correction
25 TP - 0 correction
38 TP - 0 correction
50 TP - 0 correction
63 TP - 0 correction
75 TP - 0 correction
88 TP - 16 correction
100 TP - 16 correction

 

hrmm interesting, can you post what ROMID thats for and the address's (just the xml will do) I want to check them out

 

Here it is for ...015

<table name="Max WGDC Correction vs TPS" category="Turbo" address="3f10" type="2D" level="1" scaling="WGDuty">
<table name="TPS" address="7284" type="Y Axis" elements="9" scaling="ThrottleVoltage16"/>
</table>

<table name="Max WGDC vs Coolant Temp" category="Turbo" address="65d0" type="2D" level="1" scaling="WGDuty">
<table name="Coolant Temp" address="70f8" type="Y Axis" elements="8" scaling="Temp"/>
</table>

The WGDC Limit Table I don't have the address as it's not from ecuflash

btw mrfred found the two tables...

 

I know where that WGDC Limit Table is. In ECUFlash, its the "Min Temperature for Full Boost" setting. tephra and I have been talking about what that does. So that's what it does. I'll have to look at the code to see what flag controls whether or not it goes into action.

 

I think it's a different table in ecuflash as it has 85 in the table instead of the 63 my source has in it.

Of course my source could be wrong as well.

However 63 makes more sense to me since stock the WGDC's are 100%. A drop from 100% to 63% would be much less boost when the car is cold than 100% to 85%.

 

I noticed that too - how do I fix it, and would it effect my tune if I did?

 

what does it log when no throttle?

you probably need to adjust the angle of the TPS sensor, not sure how.. probably some alignment bolts someplace

MrFred that mintemp thing is just a 1d value rather than a table. Still think its for something totally different :P hehe

 

Yeah, in ECUFlash its the scaling applied to the data in the ROM.

Temperature scaling -> 85C
WGDC scaling -> 63%

 

I think it is a 1d table that razorlab is talking about.