Quote:
Originally Posted by talonsway
Boost source will be going to the intake next. with that flapper open like i had it. Shouldnt i have not been able to boost at all?
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It should have been as low as you can physically go if you were sure the arm was removed and flapper stuck actuated to have the wastegate channel open. That is why halon was saying if you still were getting creep with the wastegate fully open changing the actuator will not help cure your problem. You will need to enlarge the wastegate so you can vent off more air.
The steps people want you to take are as follows:
1. Open wastegate fully check air flow by disconnecting rod/actuating flapper. Once you confirm you can flow enough air to avoid the boost raising above your target point then go to step 2. If you cannot flow enough air you know this is your problem.
2. Hook actuator back up to compressor source without mbc installed. The boost should build to the point in which the spring holding the wastegate flapper is overcome by the boost pressure. The wastegate will then open and start diverting exhaust gases away from the turbo. If this works correctly and only creeps to a stable amount like the 20-21 psi shane said then you know this is going to be your boost level unless you set the mbc higher. You can then go to step 4. If your still getting a problem after this you can check the following: actuator arm stuck/not working bad actuator or go on to step 3.
3. Hook actuator up to inlet source. If this fixes your problem then it was something with the source. Go on to step 4.
4. Install mbc. Set boost level. If you set it below the 20-21 psi (or whatever psi the wastegate actuator/flapper is allowing to flow) its likely going to creep back up to that anyway. If you set it above it should build to the desired level and hold. If your just spooling building boost as before then you know its your mbc.