Air leaks can cause really weird things with the fuel system. I
chased a leak in the 124 for years without success until I finally
changed EVERY hose bit, and bypassed the fuel heater. Never did
find out where the leak was, but no more problems. It would have no
start cold, no start hot, and plugged filter symptoms randomly. It
is really nice now, with the fuel air leaks gone and the suspension
rebuilt. Sounds wonderful and runs great! (OM603)
But if there is an air leak, would it not have shown itself earlier?
A venturi would be created in the fuel lines while driving which
would suck air into the lines. Might it be the ... no. The hand
pump would allow leak down at cold as well as hot.
IF there is air in the system, how is it able to bleed out enough to
allow cold start fuel delivery?
clay
On May 21, 2013, at 5:44 AM, Jim Cathey wrote:
Could this hot starting problem be caused the valves being
out of adjustment?
No, those result in COLD-starting problems. The valves get
tighter with age, and with cold.
Any suggestions are very welcome.
Your symptoms _scream_ air leak (into the fuel system) to me.
It doesn't take much air to really mess up its ability to
actually inject fuel, as air is highly compressible.
> -- Jim
>
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