It was the BOV! The adjustment screw fell out!! Covering the hole makes the leak go away, but don't have a screw on hand to try putting in (and can't see what we're doing anyways, its upside down on top of the power steering pump).
First I started by disconnecting and capping off the secondary butterflies.. this had no effect (still only 10inHg). disco'd the BOV and it went to 20inHg+. Reconnected butterflies, still good.
The BOV hose was messed up at the BOV end (expanded) so we assumed thats all it was, got some new hose... well, it helped, now it was ~12-14inHg. Still not perfect. So we figured we should try adjusting the BOV.. reach around to find the adjustment screw only to realize its GONE! Mystery solved. Finger on hole = perfect vacuum.
So I disco'd the BOV for now and figured I'd just be without BOV.. except I'm not getting the compressor chatter I had when stock (no BOV).. so it's still recirculating some ?? might be because its seeing atmospheric as its input, even capped off.
So I go around the block, and damn its hella faster. And it pings around 4k at WOT, either ECU needs to reset itself or I need to up the TTP_MAX I'm thinking. I can take it on the highway without ping tho, thats just when I'm boostin' up.
Before, my peak boost was .4bar, now its .6bar.. thats over 2psi increase just by fixing a leak!
Once I get the ping thing taken care of, I'll probably finally dyno next year since it'll be running right.
I think I got this BOV from TMS, it's a Sheepdog Prof (the kind with the second outlet on the back that under higher pressure difference will BOV without recirculating). TMS, do you remember anything about this thing's adjustment screw?
Fixed my boost/vacuum leak...
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biosehnsucht
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float_6969
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Re: Fixed my boost/vacuum leak... (biosehnsucht)
I couldn't imagine that there would be anything special about it. Just find a bolt that threads in and get a nut to tighten against the housing so it doesn't do it again.
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biosehnsucht
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float_6969
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Re: (biosehnsucht)
That'll work too!
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biosehnsucht
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ecu reset not fix the ping at WOT over 4kish in low gears
time to play with max ttp and such.. could also be my mystery ignition timing I realize.. my pully markings (back when I tried to set the timing originally) didn't seem to be anywhere near where they should be, so I just stuck it in the middle.. (before anyone asks, I'm quite sure of the timing belt)
time to play with max ttp and such.. could also be my mystery ignition timing I realize.. my pully markings (back when I tried to set the timing originally) didn't seem to be anywhere near where they should be, so I just stuck it in the middle.. (before anyone asks, I'm quite sure of the timing belt)