So, the 93 MR2 turbo ECU was designed to monitor air temperatures between 33 and 133ºF and adjust wastegate actuation and timing accordingly. now that temperatures have dipped below freezing as daily highs my car will now only run at 4-5 PSI max. However, last night on my way home it was cold enough to open my wastegate at 1.5 PSI! There is a sensor I can pull called a T/VSV that will disable this feature, however, I will need a boost controller first.

Several MR2 gearheads say that they didn't pull theirs and left it. However some are arguing that it would be safe because the knock sensor would retard timing if necessary...

:crazyr: i don't know what to do. the car feels like a dog in sub-freezing temps.

 

sell the mr2.

problem solved

 

i haven't put that thought down yet.

 

I dunno at least theoretically it sounds like not the hottest idea. You're pulling something that adjusts timing and boost so it'll run more boost, but what happens to the timing? You don't want to just rely on the knock sensor to constantly pull timing out because well, it has to sense something first before it does. h:

 

TO ME!!!!!

 

SRT-4 PCM is the same way, but it's not that drastic.

 

Ebc Ftw

 

What Spanky said, get this you cheapskate:

 

My car goes faster in the cold with it's awesome -14.7 PSI of boost. hfawk:

 

actually, the boost gauge may be faulty and is causing my low boost readings. damn autometer