M mudder1912 Well-Known Member Joined Mar 14, 2008 Messages 129 Location aberdeen Oct 12, 2009 #1 help i have a 1990 f150 300-6cyl. fuel inj. wont start unless you spray gas in the plenum then it runs and starts fine until you let it sit for a period of time. i know get a chevy loose the problem Last edited: Oct 13, 2009
help i have a 1990 f150 300-6cyl. fuel inj. wont start unless you spray gas in the plenum then it runs and starts fine until you let it sit for a period of time. i know get a chevy loose the problem
N nwbronco New Member Joined Jul 13, 2006 Messages 3 Location Olympia Oct 14, 2009 #2 There is an air by-pass valve that will open the butterfly a bit for air.