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Originally Posted by pberku
I still agree with the theory, BUT keep in mind that the symptom only occur when the fuel tank is less than 1/2 full. So if the leak was somewhere in the rear, or at least before the pre-filter, than it should take the air a few minutes to reach the injection pump once the car is started. This is not the case, as it happens immediately after starting the car.
On the other hand, if the leak was somewhere more forward, ie: past the pre-filter, than the amount of fuel in the tank should not make a differenece.
Keeping the above in mind, than where would such a leak likely be?
Phil
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Since the stumble is immediate, it says that the leak must be very close to the IP.........after the secondary.
The amount of fuel still matters. The pressure in the entire system is greater with more fuel in the tank........thereby mimimizing the capability of the system to take on air through the point of the leak.