I found out yesterday the fuel pump has quit working. I was working on the NO SPARK issue that many of you here are all too familiar with and which has not been resolved. When I turned on the ignition I heard the familiar half second hum from the fuel pump. After several more tries it registered in my subconscious that the fuel pump was not priming. GREAT, just what I wanted, another issue to solve. I started at the first logical place I could think of and checked the fuel pump relay in the trunk, it was working. I had power to the relay but when I jumped the 30/87 terminals in the socket the pump didn’t run. I checked the wire (blue/red) from the connector on top of the tank to the relay and it is good. It had been a while since I had turned the ignition on so I tried it again and on the first try the pump did it’s half second prime but when I tried again I could hear a little noise from the pump, very short, not a priming sound but something that let me know the pump was getting the call to action, getting power. Bottom line if you let it set for a while you will get a prime from the pump on the first try, no prime after that, it just makes a small noise, enough to let you know it’s getting power.
So here’s the question, (and unfortunately I think I know the answer), Is the fuel pump going bad or is there some other condition that would cause the pump to act this way?.
I am really bummed out at this point and would like to get on with my life. I haven’t resolved the initial issue and now have two more, limp mode & fuel pump. I replaced the fuel pump many years ago and it’s no easy job. I believe I have to repair the pump before continuing with the No Spark issue because the Jag is never going to start if the pump is bad.
Please share your thoughts on this and again, many thanks for your help in advance.