While we are on the subject of fuel pumps - the mechanical pumps in particular. I would suggest always carrying a spare fuel pump pushrod. I have loaned (given) at least two out to club members in the past at meets because their mechanical pumps have either stopped pumping altogether or have started to starve the carbs to a lean condition at highway speeds. The pushrods wear down such that the fuel pump actuating lever does not get enough stroke from the lobe on the cam to give you a full pulse of fuel per each stroke. They are cheap insurance and don't take up a lot of room in the tool box. Big John Mc Adams (In SoCal) -----Original Message----- From: Chrysler300@xxxxxxxxxxxxxxx [mailto:Chrysler300@xxxxxxxxxxxxxxx] On Behalf Of Ryan Hill Sent: Friday, October 14, 2011 11:25 AM To: paulholm@xxxxxxxxxxxxx; chrysler300@xxxxxxxxxxxxxxx Subject: RE: [Chrysler300] Re: AUXILLARY FUEL PUMP Many of us have run electric pumps alone that way without incident but it's dangerous if you're running a mechanical pump as well, especially with modern fuels that seem to deteriorate the mechanical pumps faster than in the good old days. Also, if you're running an electric pump full time as your only pump on a carburated car, I would think you should have a low oil pressure kill switch or inertia switch installed in the event of an accident where the key is not turned off. Nothing like having a fuel line rupture and a pump continuing to run and spray raw fuel all over. Ryan Hill To: chrysler300@xxxxxxxxxxxxxxx From: paulholm@xxxxxxxxxxxxx Date: Fri, 14 Oct 2011 13:54:07 -0400 Subject: Re: [Chrysler300] Re: AUXILLARY FUEL PUMP On 10/14/2011 1:27 PM, Ryan Hill wrote: > > One important thing to remember when running an auxiliary electric pump like this. If the electric pump is left running and your mechanical pump fails, you could potentially fill your engine with fuel. (If the diaphragm fails, it will leak internally) The damage can be catastrophic! Also, in the past, some have mentioned the convenience of having a second pumping source to limp home on in the event their mechanical pump fails......this should only be done after bypassing the mechanical pump for the same reason. > Make sure the pump is being shut off, I would set it up with a push button rather than a switch so it's only on when I push it to prime the carb. > Ryan Hill way back when, we used to just wire the pump to the 'hot when key on' source that way if the key was off and out the pump was Not running -- Paul Holmgren Mine: 2 57 300-C's in Indy Hers: 05 PT GT R/T HO Stage 1 Hoosier Corps L#6 [Non-text portions of this message have been removed] ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links ======= Email scanned by PC Tools - No viruses or spyware found. (Email Guard: 7.0.0.21, Virus/Spyware Database: 6.18511) http://www.pctools.com/ ======= ------------------------------------ To send a message to this group, send an email to: Chrysler300@xxxxxxxxxxxxxxx To unsubscribe from this group, send an email to bob@xxxxxxxxxxxxx or go to http://autos.groups.yahoo.com/group/Chrysler300/join and select the "Leave Group" button For list server instructions, go to http://www.chrysler300club.com/yahoolist/inst.htm For archives go to http://www.forwardlook.net/300-archive/search.htm#querylangYahoo! Groups Links <*> To visit your group on the web, go to: http://groups.yahoo.com/group/Chrysler300/ <*> Your email settings: Individual Email | Traditional <*> To change settings online go to: http://groups.yahoo.com/group/Chrysler300/join (Yahoo! ID required) <*> To change settings via email: Chrysler300-digest@xxxxxxxxxxxxxxx Chrysler300-fullfeatured@xxxxxxxxxxxxxxx <*> To unsubscribe from this group, send an email to: Chrysler300-unsubscribe@xxxxxxxxxxxxxxx <*> Your use of Yahoo! Groups is subject to: http://docs.yahoo.com/info/terms/