still has me stumped, the A/F at idle goes from 14.0 down to 13.7 at idle with the vacuum hose plugged and removed from the regulator. I waited until it was dead cold and it still seems to drop to 35 psi when I hit the throttle and it takes its time to return to about 40. Both filters are clear.
This may sound nuts, but is it possible for a new engine after about 750 miles to actually improve its vacuum response at the manifold? This thing seems like its pulling more vacuum now, even my old data logs show a lower KPA value at idle. When we did the tune on the engine it had maybe 10 miles on the engine.
I pulled the hose, plugged the line and have a solid 44psi always, as soon as I can get out I will se how it runs. Is it prefered to run a vacuum reference?
Thanks Rich
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