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bad waste gate or solenoid?

5.4K views 4 replies 3 participants last post by  Theory  
#1 ·
Every once in a while when I hit wide open throttle and I get above 4 grand the turbo begins to pulse. Feels like I'm going in and out of boost. And it seems like every once in a while it get worse. Anyone else experiencing this in a manual. Mods are in signature
 
#2 ·
If the engine is below operating temp, boost is limited. I've also noticed that mine will do this in extreme humid/wet conditions when hot (like in or immediately following a heavy rain in 90 degrees).
Definitely attributable to the wastegate/solenoid, but I believe it's a built in safety type issue.
 
#3 ·
This will be at full heat soak. It's a pulse that lasts about 1 sec on and 1 sec off for as long as I'm above 4 grand
 
#4 ·
I had a feeling my fmic and no tune would be the culprit. I'm working on saving for the tune though. Thanks rock
 
#5 ·
When I first got tuned on the way home I was on the freeway and would be next to the barrier and I would punch it and hear flop flop flop flop flop while the turbo is spooling I asked tork he said probably just getting used to it