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I have a Profec B installed on my 97 supra. I was running 1.3 bar on the low boost setting. For the last couple of days I have been unable to boost past 1.1 bar. I turned up the knob almost all the way little by little and still nothing past 1.1 bar.
The clincher is that the boost controller works fine on the high boost setting and I am able to boost to whatever I set it too.
This would rule out boost leaks, vacuum leaks, and stuck solanoids since all these would be shared on the high boost setting. Someone suggested a defective head unit.
Has anyone ever experienced this problem? If so is there an easy fix for it?
Any help would be appreciated. I am ready to pull the head unit and send it back to greddy if I can't figure this out.
Thanks,
Pete
The clincher is that the boost controller works fine on the high boost setting and I am able to boost to whatever I set it too.
This would rule out boost leaks, vacuum leaks, and stuck solanoids since all these would be shared on the high boost setting. Someone suggested a defective head unit.
Has anyone ever experienced this problem? If so is there an easy fix for it?
Any help would be appreciated. I am ready to pull the head unit and send it back to greddy if I can't figure this out.
Thanks,
Pete