I have a strange boost problem in my S2, it was stopped in a hot garage around 2 months (temp. in a sunny day will be 50ºC or even more...)
I drove it two days ago and the car goes fine as usually, but the max. boost what I have it's only 0,4bar. The last time who I drove it was perfect....after the stop no.
I checked/changed n75 ( even a output test ), wastegate, turbo ( looks nice turbine/compressor wheel), FPR, Rs4 MAF, intake hose pressure test, MAP vacuum line, DV.
I fitted a stronger wastegate spring, the boost was 1,2bar (mine is 1,7bar) and the turbo spins good and sound nice.
I open the ecu to check the MAP ( stucked with a pice of rubber or something ) and was ok. I made again the intake hose pressure and check the MAP voltaje signal, I think that it's ok, These was the numbers (aren't totally accurate because to check the pressure I used the car boost gauge and it's mechanical):
0bar--1,2v
0,3bar--1,6v
0,5bar--1,8v
0,7bar--2,1v
0,9bar--2,3v
1,1bar--2,5v
1,3bar--2,8v
1,5bar--3v
I think it's a motorolla 350 or 400kpa, was done by Dmitri
Also I found rubber into the plastic catch tank MAP, but the line it's good
https://i.pinimg.com/originals/3f/db...8deff19752.jpg
The symptoms it's like the ecu forgot that he need to talk with the n75 to give me boost...it's a turbo engine not N/A
Also when the rpms are high, and the boost will be 1,7bar not 0,4bar (spring rated), the AFR it's rich...lower 11
And I can't test with other ecu because mine it's mod to use Rs4 MAF
Ideas??????
I drove it two days ago and the car goes fine as usually, but the max. boost what I have it's only 0,4bar. The last time who I drove it was perfect....after the stop no.
I checked/changed n75 ( even a output test ), wastegate, turbo ( looks nice turbine/compressor wheel), FPR, Rs4 MAF, intake hose pressure test, MAP vacuum line, DV.
I fitted a stronger wastegate spring, the boost was 1,2bar (mine is 1,7bar) and the turbo spins good and sound nice.
I open the ecu to check the MAP ( stucked with a pice of rubber or something ) and was ok. I made again the intake hose pressure and check the MAP voltaje signal, I think that it's ok, These was the numbers (aren't totally accurate because to check the pressure I used the car boost gauge and it's mechanical):
0bar--1,2v
0,3bar--1,6v
0,5bar--1,8v
0,7bar--2,1v
0,9bar--2,3v
1,1bar--2,5v
1,3bar--2,8v
1,5bar--3v
I think it's a motorolla 350 or 400kpa, was done by Dmitri
Also I found rubber into the plastic catch tank MAP, but the line it's good
https://i.pinimg.com/originals/3f/db...8deff19752.jpg
The symptoms it's like the ecu forgot that he need to talk with the n75 to give me boost...it's a turbo engine not N/A
Also when the rpms are high, and the boost will be 1,7bar not 0,4bar (spring rated), the AFR it's rich...lower 11
And I can't test with other ecu because mine it's mod to use Rs4 MAF
Ideas??????
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