im freaking out. evoscan is showing -7 to -8 inhg at idle, boost gauge is showing 16-18!

the map was reading correctly the last time i logged (a month ago), i flashed nothing between then and now, changed nothing etc, only thing i did was move in elevation from ~1000ft to ~500 ft which i accounted for in the formula. it has just started reading wrong apparently.

ive checked and rechecked my xml as well as the rom map settings and they are all right as i far as i can tell. see below.

settings left to right are as you run down the "map" section of ecuflash.



formula in evoscan is 0.2369*x-14.4

i moved a couple things around in the list in ecuflash but MAP isnt dependent on anything else so i doubt that affected it.

ANY help would be awesome...this is my daily driver!

 

so to make this even weirder...looking through my logs from this morning, it appears that the full throttle map reading appears to be right where it needs to be.

so what could cause it to be off at idle and not under boost?

i believe my boost gauge is teed off the bpv line, could there be a vac leak in between there somewhere? the car seems to be running almost normal so im not really leaning towards a vac leak...

 

Nothing is wrong. Your boost gauge reads vacuum in different units than your map sensor. Your boost gauge is inches of Hg, your map sensor is 'negative' psi, using the crossover point as atmospheric pressure.

 

You ARE aware evoscan show PSI only right?

just 2x the number for a simple psi to inhg conversion. Evoscan isn't fancy enough to do both inhg measurement and psi when in boost.

You readings show -14inhg to -16inhg just fyi

 

Ignore the vacuum, it's wrong, it's always wrong, it will always be wrong, it was never meant to be right

 

LOL

well I feel like a tard.

I never even had the thought that it was exactly half what my gauge was reading.

/end freakout

thanks guys haha