manual fuel pump

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manual fuel pump
chesney4 avatar
chesney4
+1y
I have a 91 b2200, the fuel pump leaks only on initial start up in mornings.
Any reasons why. Thanks
hocbj23 avatar
hocbj23
+1y
Yep.Overnite everything cools down and conracts.When u start in am, pump leaks until temp and pressure rises and seals leak.It will just get worse.BJ
hex0rz avatar
hex0rz
+1y
Mechanical fuel pump, you mean? The one that runs off of the camshaft? If so, that leak you have is a safeguard to tell you the diaphragm is bad! Replace that sucker ASAP!

Mine was bad for quit a while until I noticed the leak! I had 12 mpg!