Primary boost fluctuating

For the older twin turbo B4 models

Primary boost fluctuating

Postby 01OBK » Mon Oct 09, 2017 7:24 pm

Hey guys
New to the forum, I've got an issue with my primary boost not pushing past 6psi, and it fluctuates between 3-6psi. Feels like it keeps pulling timing out. The change over to secondary comes on late too at around 5000-5500rpm.
I replaced the cam and crank angle sensor when I swapped the engine in. I've also replaced the MAF sensor and knock sensor too. Still no change.
I've cleaned out the BBoD multiple times and the problems still there. I have upgraded the BOV with a GFB one. Didn't make a difference.
Also idles a bit rough and around 1000rpm.
Anyone got any ideas?
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Joined: Thu Sep 28, 2017 6:52 pm
Car: Twin Turbo swapped Outback

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