On Fri, Mar 24, 2006 at 11:59:30AM -0500, Marshall Booth wrote: > There are at least two different pumps, pumps that lock down the piston > and pumps that don't lock the piston. The vibration you feel is fuel > that has passed through the relief valve and into the return hose, so > the pump is working! That doesn't mean that air isn't entering the pump > or somewhere else in the fuel path and that allows fuel to drain back > into the tank when the car sits for a while. That will require > additional cranking to move fuel into the injection pump before the > engine will start. If pumping the hand pump results in prompt starting > under conditions when the engine is likely to be slow to start, then air > entering the system (often thru the hand pump, but possibly thru leaks > in any of the flex lines) is PROBABLY the cause.
It leaks down fast, as in overnight. Aside from leaking fuel (which I have none), is there an easy test for this? How many times should I expect to pump the pump if it leaked down? I don't notice a difference with around twenty or so pumps. > It could be tight valves. I think I'd adjust the valves anyway since > they need it but as the weather warms, even moderately tight valves > won't inhibit starting any more. It isn't that cold around here, maybe fifty, and I'm at sea level (okay, thirty feet above). I had planned on adjusting them next weekend anyways. Thanks... K
