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Strange fuel pump problem Posted by Pete [Email] ![]() ![]() |
A couple of months ago a buzzing sound appeared with my 9000T -88 Automatic. I noticed the sound came from the fuel pump and I was sure that the pump was about to go. The pump was quiet when the fuel level in the tank was above a half but got noisy as the fuel level dropped. A Saab mechanician replaced the main pump without any improvement. After replacing the smaller feed pump the problem disappeard and I was happy.
However, after a couple of weeks from the replacement the same damned sound came back. I'm sure it is the pump. The sound is not so loud as it was with the old pump but it is there (most notable especially just after starting the engine and as the engine is idling) even when the fuel tank is full.
Could this be due to faulty reassembly of the pump into the tank? The mechanician said that he had never replaced that kind of pump. I read from the Haynes manual that the pump should be positioned in a certain way into the tank.... I'm helpless, so any comments and advice will be greatly appreciated.
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