Hi Lucy & welcome to the forum.
what are the symptoms, car doesn't start or starts but doesn't run properly?Oh er! it's all techno-jargon going right over my single-cell brain. As soon as I can find out what the actuator for the fuel pump is and how to acquire it and fix my little runner, I shall be a as happy as a bumble bee....
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The actuator on the fuel pump is an electronic valve/switch allowing flow of fuel. If that were faulty it could explain your troubles.It's a 53reg civic cdti. It starts okay from cold, but starts to play up when I want to start it warm. The malfunction indicator comes on (with a jerk) in addition to the other indicator (swirly lines).Last week it completely died in the middle of the road, I had to wait about 5mins before it would start and struggled to make it home.The glo plugs were changed as they knackered as per diagnostics the MIL went off for a day and came back on again. Tech also said there as was a problem with fuel pump actuator. The main problem with that is: No Toyota dealer knows what that is!!! Only one person (Grumpy001) on this forum has mentioned fixing the actuator on his fuel pump, so I was hoping for some redemption....sigh