I’ve installed a Supersonic and now my engine is dipping below normal idle and stalling.

• Check the vacuum hose for splits, cracks, loose connection, kinking or any obstruction – old or fatigued hose may collapse under vacuum causing an obstruction
• With the engine running remove the vacuum/pressure hose from the nipple in the cap of the BOV, there should a loud hissing sound. The engine should idle poorly, double-check by covering the end of the hose with your finger. If this does not occur, the hose could be blocked or crimped. Check the hose and replace it if necessary.
• Ensure that the vacuum/pressure source is not shared and that the vacuum source is directly from the inlet manifold
• Check the seal between the adapter and the Race Port – ensure that there is no gap between the BOV base and the weld flange
• Check the joint between the adapter and the intercooler pipe for leaking.

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I’ve installed a Supersonic and now my engine is dipping below normal idle and stalling.

I’ve installed a Supersonic and now my engine is dipping below normal idle and stalling.

Related Articles

What’s the difference between a “Dual Port”, a “Supersonic”, and a “Plumb Back” valve?

I’ve installed a VeePort in my car and despite all the tuning the car still stalls.

After installing the eBoost2 my engine is over-boosting/underboosting.

I’ve accidentally zeroed all the dials, what are the factory settings on the FCD2?

My valve is not functioning the way that it should be. What should I do?