Quote:
Originally Posted by Ender
Then check it all again. Maybe something got left open/unclamped. I only mentioned total loss of compression because I was trying to think of all the physically possible ways this could happen. I do think it's highly unlikely.
If you have to keep the flapper open to make it idle you might have a bad AFM, that's a key bit of information that would have been good to mention at the start. Test it according to the FSM.
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If he had no compression the motor wouldn't start and run whether he held the flapper open or not. The fsm test are only gonna tell him if the electronics in it are fine. Mechanically the only thing I can think of that could physically go wrong with an afm is the spring, but that would stop it from closing after it opens. Which leaves me to believe something could be jamming the flapper but he states he can hold it open and keep it running. And if it's not pulling enough air through the afm to open the flapper by itself but he can hold it and it runs then it's getting air from somewhere else = air leak, a massive one. Now if he could drive it at all and tell if it's boosting properly we could tell if it's before or after the turbo. But it's not driveable as is.