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Hi all , i own a 2008 Evo SST EU Spec , car is mostly stock other than a recent spark plug change, 850cc injector upgrade, a straight through with a Trust catback

Engine has recently been recently overhauled, just ran 3500km, however even at idle, boost meter is reading 1.55 bar. With the map sensor plugged in, it goes to vacuum den max out back and get stuck at 1.55 bar after a while. But it keeps stalling. Car is now currently running without MAP sensor.

My mechanic and tuner has suspected and replaced the following other than engine overhaul;

3x MAP SENSOR
GSR SST ECU
ENGINE HARNESS

but to no avail … car is tuned rich to protect anything from going bad currently. Can anyone advise?
 
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