Turbo problem?! - Mitsubishi Lancer Register Forum

Go Back   Mitsubishi Lancer Register Forum > Technical > Engine / Turbo

Thread Tools Rate Thread Display Modes
Prev Previous Post   Next Post Next
Old 14-08-2018, 16:15   #14
Registered User
Join Date: Aug 2018
My Car
Posts: 42
Originally Posted by kikiturbo View Post
boost plot at a minimum, but you really want a log from the ecu... like ecu load, WDGC, WDGC error,

basically, evo's will usually overshoot their boost target. What happens is that when you load up the car at low rpm the boost will shoot up, and the base waste gate duty cycle (WDGC) will be too high, esp with 3 port solenoid. When the boost readches the desired level the ecu will start lowering the duty cycle, but depending on the settings in the map iit will not pull it fast enough. Also, evo ecu looks at ecu load, which is measured at MAF and not boost directly (depending on model)... so ecu will sometimes be too slow to react. As a result you will overshoot the target boost. Now, in the ecu you have some load limits in the map, and if you overshoot those you will have a pretty hard limit that you will hit and will sense it, like a hard RPM limit..
if you do not hit that limit, and overshoot boost, you can have knock, and then the ecu will pull timing and add fuel. As a result you can feel the engine boost up hard, then loose power for a while....

if you look at your boost you will probably see boost go up, spike and then drop down.. that is what is sounds to me... In any way you will need a good log of it happening to see what is going on.. maybe a look in the map too..
That is all way over my head.. i've screen dumped it to my mapper. Hopefully he can shed some light on it all for me. I know the mapper put waste gate duty to 0 and it was still spiking.

With regards to seeking a log.. is there something i can plug in to read it?
Evo8.Rob is offline   Reply With Quote

Thread Tools
Display Modes Rate This Thread
Rate This Thread:

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

All times are GMT. The time now is 08:05.

Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2021, Jelsoft Enterprises Ltd.
vBulletin Security provided by vBSecurity v2.2.2 (Pro) - vBulletin Mods & Addons Copyright © 2021 DragonByte Technologies Ltd.