Boost Gauge Reading 1.2 Even When Idle!

[enka]

my gauge showing this 1.2 or maxed, checked the voltage wiring from behind the meter 11-12v constant when acc/ign/on.

voltage on boost sensor it self 2.68v.

is this the correct voltages?

is it normal to have 12v boost wire right behind the cluster?

i plugged this boost wire to mfd and have no idea what went wrong, or is there additional step to reset mfd?

all other sensors are working normally, car is 34 gtt. :\

[scotty nm35]

http://www.skylinesaustralia.com/forums/topic/297345-m35-factory-boost-gauge-repair/?hl=%2Bboost+%2Bsensor+%2Brepair#entry4953193

That's a link to my repair thread, the 34GTT is the same sensor. There is a specific skyline how to floating about also.

[enka]

but but... my sensor reads fine, it's showing 2.68 kinda close to nissan spec which is 2.2v on idle/no boost, just the wiring from behind cluster or mfd, that i'm not sure if that is the problem...
whats ur V sensor reading on idle Scott?

[enka]

nevermind that was the ecu sensor I;m talkin bout, I'll check the other one

[scotty nm35]

Is the gauge erratic? Mine was all over the place. It's a very common failure point so if the re-solder doesn't fix it, just buy another sensor off me and drop it in perhaps?

No idea what the voltage is at idle, as idle vac changes with every engine anyway. It obviously isn't correct though.

[enka]

it's static at 1.2, I'll try resolder it, I'm afraid it's the mfd itself, although we shares the same engine etc, we're both s2 neo rb25det i reckon

[enka]

resoldered the joints and found out there is no ground supplied to gauge sensor f**K!

fixed.