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Scion tC 1G Forced Induction Turbo and supercharger applications...

[Help] Boost Pressure Too Low

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Old Dec 24, 2012 | 05:11 PM
  #1  
tootles23's Avatar
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Default [Help] Boost Pressure Too Low

My engine load gauge on the FIC is reading at around 6.5 psia, which is wayyy too low. My map doesn't even account for load that low. When I get up to around 6.5k rpm, the load gauge shoots up to maybe 9 psia, then drops back down to 6. I'm pretty sure I tapped the brake booster line. My methods were ____ty at best, and I'll pick up a vac block eventually, but I don't think it would affect my readings.

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I just finished my turbo install, and this is the only thing holding me from hitting the road. Please Help!

I can attach a log too if that helps.
Old Dec 24, 2012 | 07:55 PM
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You might have a leak
Try using a clamp
Old Dec 24, 2012 | 10:18 PM
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I would start by clamping down the lines with small worm clamps and getting a vac block ASAP.
Old Dec 26, 2012 | 01:49 PM
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Definitely sounds like a leak. Check the silicone couplers to make sure one didn't pop off. Do you hear your BOV nice and loud? If not, then a leak before the BOV (that happened to me the first time). Also check the coupler to the throttle body. That was a PITA to get on and would slip off at the beginning.
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