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Full Version: 15 Hg for idle vac. too low???
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Mueller
I'm still fine tuning my fuel injection and I just noticed that the vac. is reading in at 50kPa or 14.764 inches of mercury......what is the normal reading for a stock /4 motor? I'm going off what my laptop is reading right now, I have to find my vac/pressure gauge to verify this reading....according to the documentation for the FI, I should be closer to 25Hg instead of 15Hg for a stock motor?????

thanks
Bruce Allert
Last time I checked, vacuum for a good running engine at idle was 15. But that was a while back so my memory could be failed, faulted or just phuqued up wink.gif

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