Random overboosts
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Location: Sydney, Australia
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Random overboosts
got a weird boost issue that has even got my tuner stumped so was hoping someone could throw some ideas my way
On some runs WGDC% behaves as you would expect and will raise and lower as you would expect so that boost will correct and then on other runs it will hit a number and stick eg below
Here you can see WGDC sticks on 85 and 95 and boost overshoots to 34 psi (not good a standard 8 GSR turbo)
and here you can see it adjusting correctly and hitting its target boost
What I have tried
Borrowed an ECU from another evo 8
borrowed another 3 port
I checked the hoses on the 3 port and they seem fine but didnt go as far as pulling them out and giving them a real close look
pulled out PIN 41 (waste gate solenoid) on the ecu and reseated it incase it was not making a good connection.
This morning I lowered the preload on the actuator by 1 half turn just incase it had too much preload and loaded a rom that had all boost settings zero'd out so that it should be hitting wastegate pressure. Didnt log it but boost gauge says i was hitting 1 bar but then on one or two random boosts it hit close to 2 bar.
The actuator I have on at the moment is a Kando 1.2 bar actuator the only thing I can think is to swap back to the factory actuator which I have sitting in the garage apart from that I'm stumped as well.
On some runs WGDC% behaves as you would expect and will raise and lower as you would expect so that boost will correct and then on other runs it will hit a number and stick eg below
Here you can see WGDC sticks on 85 and 95 and boost overshoots to 34 psi (not good a standard 8 GSR turbo)
and here you can see it adjusting correctly and hitting its target boost
What I have tried
Borrowed an ECU from another evo 8
borrowed another 3 port
I checked the hoses on the 3 port and they seem fine but didnt go as far as pulling them out and giving them a real close look
pulled out PIN 41 (waste gate solenoid) on the ecu and reseated it incase it was not making a good connection.
This morning I lowered the preload on the actuator by 1 half turn just incase it had too much preload and loaded a rom that had all boost settings zero'd out so that it should be hitting wastegate pressure. Didnt log it but boost gauge says i was hitting 1 bar but then on one or two random boosts it hit close to 2 bar.
The actuator I have on at the moment is a Kando 1.2 bar actuator the only thing I can think is to swap back to the factory actuator which I have sitting in the garage apart from that I'm stumped as well.
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