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Subject Fuel pressure loss- check my diagnosis?
     
Posted by Roundabout136 on April 02, 2010 at 3:29 PM
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Message Changed a few injectors a few weeks ago and it seemed fine right after. Started right up and ran great for a couple weeks. It developed a problem starting after a while. It would take several cranks to get started.

I hooked up the FP gauge today and found that pressure drops from 44 to 0 in about 2 minutes after priming. I pinched the return line back to the tank and the problem persisted. So I though maybe the fuel pump check valve might be the problem. Then I primed it, pinched the return, and also the feed, cutting off all lines to the tank. The pressure continued to drop with both lines pinched. I concluded that a lower injector o-ring had developed a pretty bad leak. I never noticed any smoke or anything. I don't see/smell any fuel leaks to the outside.

Does anyone have any other possibilities? The only thing I can think of to do is pull the fuel rails again and see if they leak out of the bottom.

Thanks
-Adam

     
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