Thanks Midnight_man,
So car is completely standard small turbo, no modifications at all, so standard chip injectors etc. if i unplug power to the amal valve i do just get wastegate pressure with no overboosting. The amal valve seems to be opening because when plugged in pressure is being bled from it to increase boost but it's either not being told to close or not getting the signal to close or somethng else elsewhere in the system but i'm pretty stumped now as when valve unplugged no overboost but with valve plugged in overboost.
Have got vacuum on idle, needle right at bottom of guage and boost does rise to 0 when pressing accelerator and have not noticed the car feeling lazy.
Any other ideas, any other sensors i can check?
John.
Originally Posted by
midnight_man
Check again all pipes about turbo for leaks,,,specially "T" pieces in system... I had same problem. You can easyly check you amal valve for working, unplug one side of pipe...connect 12V to amal valve (from battery) and make some pressure to pipe. You can test it if its working. (I am guessing that amal valve will be ok)
What chip you have in car? What ECU and what config of engine? Turbo, injectors...etc. Do you have vacuum on idle (on turbo pressure gauge)? When you "fast - softly" pull the accelerator pressure gauge must jump up to 0 bar for second. (If you have leaks, it will not jump to 0 bar, ).
Finally when there is a leak in the system turbo is charging pressure for a long time... car is little bit "lazy" up to 2500 - 3000 rpm.