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New DS Owner with old problems

Tags: pump fuel pump

New user to the forum but I've been lurking for the last month or so trying to figure out my problems. Great site with lots of helpful tips and insights. And since I'm a new member I can't start a new thread in the EFI section, so I guess I'll post my problems here where I'm allowed to start threads.

I bought my buddy's 2008 DS450 that had been ridden regularly before dirt bikes took over his world. It had been sitting untouched in his garage for over two years when I talked him into selling it to me for cheap. I knew the battery would be dead and the fuel would need to be flushed out of it at a minimum.

I replaced the battery and the engine cranked over very nicely. I didn't hear the fuel pump prime and suspected the fuel pump relay might be bad. I tested the relay by hooking it up to 12V and then testing the continuity between the other two pins; turns out the relay was just fine. I then disconnected the electrical connector to the fuel pump and checked to see if the pigtail connector was getting 12V during engine cranking; it was. I concluded the fuel pump itself must be bad.

I removed the gas tank (what a PITA that was, I had to disassemble half the quad) and removed the pump assembly from the tank. I then hard wired the pump straight to 12V and still got nothing from the pump, confirming that the pump was dead. I installed the new pump in the old assembly (I bought only the actual pump from ebay and not the entire assembly). I tested the pump outside of the assembly before I installed it and it worked just fine. I tested the pump again once it was installed back into the assembly and again with the assembly in the tank itself. The pump spun to life just fine and I'm thinking what a great mechanic I am for pin-pointing the problem with certainty...

I put the tank back in the quad, filled the tank with 1 gallon of fuel and buttoned everything back up. I turned the key and got nothing from the pump, no priming, no buzzing, no nothing. I retested the pigtail going to the fuel pump and again I have 12V there during cranking, but the pump isn't pumping or priming (or at least I can't hear it) and the quad won't start.

What are your guy's thoughts?



This post first appeared on Can-Am DS-450 Forum :: DS450HQ.com, please read the originial post: here

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New DS Owner with old problems

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