940 Engine Dies Sometimes When Trying to Start

[sabrina]

My 1992 940 GL starts just fine most of the time. However, when the engine is hot (like while running errands) it sometimes tries to start and fails. It sounds like it has started and then immediately dies. When I rev the accelerator sufficiently while turning the ignition, it goes ahead and starts. The problem never happens when the engine is cold. First thing in the morning, it starts just fine. And it never quits once it's going.

Here is what I have done so far:

-changed the fuel pump relay
-changed the air mass meter
-changed the fuel filter

What should I do next? Thank you in advance for your help.

[lummert]

Make certain that the fuel pumps are working.