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R34 Boost Sensor

CK34GT

By CK34GT,
in Engines & Forced Induction

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CK34GT Enthusiast

CK34GT

Posted
Posted

HEY GUYS

DOES ANYONE OUT THERE KNOW EXACTLY WHAT THE BOOST SENSOR ON THE R34 GT-T DOES?

I AM HAVING A BOOST PROBLEM THAT OCCURS VERY RANDOMLY BUT OFTENLY WHEN DRIVING HARD. CAR LOSES POWER AND DOES NOT BOOST TO FULL POTENTIAL WHEN THIS OCCURS. IT MAKES A STUTTERY SOUND WHEN HAPPENING.

MY MECHANIC SEEMS TO THINK ITS MY BOOST SENSOR THAT IS FAULTY, BUT I HAVE A FEELING THAT ITS NOT.

DOES ANYONE HAVE ANY INFO / ADVISE?

CHEERS

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https://www.sau.com.au/forums/topic/169502-r34-boost-sensor/
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Birnie Veteran

Birnie

Posted
Posted

Well, yeah, i realise that, my reply was a bit simplified but i meant id doesn't nothing in terms of engine management etc.

I disconected it cause i have an aftermarket boost gauge and used the original vacuum feed for my boost controller/sensor

Links Veteran

Links

Posted
Posted

Rich and Retard occurs when the Air Flow Meter detects too much volume of air traveling through it and thinks the turbo is possibly overboosting, it than Richens the fuel and retards the timing (this causes it to lose power), essentially a safety feature to try preventing you damaging your car if something goes funny with the wastegate..

Most likely a) you have a turbo back exhaust and the boost is now up at 10/11psi, because you go full throttle it overboosts slightly which could trip R&R..

Get an SAFC or turn your boost down..

OTHERWISE.. it's your coilpacks breaking down at 4,500 rpm like everyone elses, common in R33, not so much in R34.. This can be noticed as you might lose boost and it stutters/missfires than picks up again..

Sewid, you agree?

RB30-POWER Mentor

RB30-POWER

Posted
Posted

The GTT NEO engine and engine managment system is different to the R33 so you can't compare them.

Yes the NEO has a "Boost Pressure Sensor" aka map sensor on the back of the engine rocker covers.

Yes it is connected to the engine managment system.

What use this has with regards to fuel and timing functions i don't know if any, it may be either a back up sensor, or used to switch the pollution system purge valves etc (more accurate pollution control) I dunno exactly.

There was however a few threads, where a few GTT owners were fiddling with the outputs from the map sensor to the ecu, trying to run more boost, but you would have to search for those threads. I didn't follow the threads so im unsure what the outcome was...

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