View Full Version : BOUNCING FUEL GAUGE
qiksix
10-03-2007, 04:19 AM
Just put together a sbc in a street/strip car , now we have noticed the fuel pressure gauge bouncing. 950 demon carb with magnafuel prostar 500 pump with adjustable pressure and 2 port regulator. checked everything for dirt or sticking bits but still does it, anyone had this happen before, still haven't ruled out faulty gauge(new).
mytmouz
10-03-2007, 10:15 AM
If it's a liquid filled gauge, that's most likely the problem.
qiksix
10-04-2007, 03:14 AM
It's an autometer but not liquid filled, i'll try a different gauge and see what happens.
SST4530
10-04-2007, 01:07 PM
If it's not the guage, check for flow through the filter or obstructions at the fuel bung . I've seen pump cavitation (sucking air) cause this same scenario. Also how large are the inlet and oulet fuel lines. Never have a smaller inlet than outlet. Just my $.02