Unless the sensor is bad, it takes about 3 psi to turn out that right side "Spica" light. The system runs on about 19 psi so as soon as you turn the key on, that light should go out. The boost pump in the tank may be providing enough pressure to idle the engine and but not turn out the light. I would sooner think the problem is one of three things: That little fuel filter between the tank and the fuel pump is plugged, the bypass/pressure regulator valve in the engine compartment fuel filter is bypassing too much or the fuel pump is bad. Since that little filter at the back is fairly cheap, I would start by changing that. Then, make sure the fuel pump is running. If the Spica light then does not go out the instant you turn the key on, clamp off the fuel return line from the front fuel filter to the tank. Turn the key on for a second or two and then back off. If the light then went off, you have a bad bypass valve in the fuel filter (unobtainable). I the light stayed on, you have a bad pump. Hope this helps, Skip
Date: Sat, 24 Jan 2015 00:19:52 +0000 (UTC) From: Colin Talcroft <[email protected]> Subject: [alfa] 1978 Spider fuel pump issue continued Just to bring this up to date: The car has started since the initial failure. What I get now is the low fuel pressure indicator light (or at least I get the upper left hand red light) continuously on (which I've never seen before) and there is NO fuel pump sound at all.B I was, however, able to pull it out of the driveway and get it into the garage. I don't want to drive it any distance like that, of course, but it does in fact go. Is this consistent with a failed fuel pump? Or something else? Does the supplementary pump in the gas tank provide just enough fuel to allow it to go? Colin TalcroftSanta Rosa -- to be removed from alfa, see http://www.digest.net/bin/digest-subs.cgi or email "unsubscribe alfa" to [email protected]
