Some may remember my fuel pressure issues that I now suspect were caused by the expansion and contraction of the fluid in the gauge. I studied the little rubber plug on top of the gauge used to fill it with glycerine and cut off just enough of it to make a small hole. Voila! Instant gain from 2 PSI to 4 PSI on the gauge Note this only works if the gauge is near vertical unless you want glycerine all over the place
Second thing was my Isspro vacuum gauge. It was always kind of erratic and I assumed it was because the hose is a loose fit on the barb. I got some tiny size wire ties to tighten the hose on and it did not cure the issue. I could reach around behind the gauge and make the needle jump still by jiggling the hose. Hmm.... Jiggling the WIRES also made the needle move. Seems the light bulb sticks in just far enough to sometimes touch the gauge mechanism. I switched to a red LED bulb awhile ago and can't recall if the original bulb did this too. The LED doesn't look any bigger. I'll be modding the light holder to not stick in quite so far this weekend. 1/8" will do it.
Second thing was my Isspro vacuum gauge. It was always kind of erratic and I assumed it was because the hose is a loose fit on the barb. I got some tiny size wire ties to tighten the hose on and it did not cure the issue. I could reach around behind the gauge and make the needle jump still by jiggling the hose. Hmm.... Jiggling the WIRES also made the needle move. Seems the light bulb sticks in just far enough to sometimes touch the gauge mechanism. I switched to a red LED bulb awhile ago and can't recall if the original bulb did this too. The LED doesn't look any bigger. I'll be modding the light holder to not stick in quite so far this weekend. 1/8" will do it.
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