

| Subject: | More Fuel Pump Weirdness - Has Mercury gone retrograde again? |
| From: | Pat Sloan |
| Date: | Wed, 21 Apr 2010 12:27:07 -0700 |
Hi everyone, The Otter continues to have problems with coughing and dying. After trying a lot of things, it seems to come back to the fuel pump, which is buzzing and stressed because it is not getting enough fuel. Therefore it chokes, coughs and dies. Background: This is a 1982 Vanagon camper. It was originally a diesel, but was converted to a US 1987 1.8 L Jetta engine about 60,000 miles ago. So she is now a water-cooled, gas-powered van. Since buying her last Nov, she has had new fuel lines installed and reinstalled (first mechanic used inferior materials), fuel tank has been sealed (multiple leaks), replaced O rings on fuel injectors and tied down the several fuel injectors which were loose and would pull right out of the engine, and replaced ignition switch, battery and muffler. Now we are thinking that the problem relates to the conversion from its original diesel state to its conversion to a gas engine. Can anyone comment or verify my understanding of how the conversion affects the fuel pump issue? My Understanding: The diesel Vanagon actually has 2 fuel pumps - 1 located in the gas tank, which pulls the fuel up into the fuel lines and sends it along to fuel pump #2, near the engine, which actually pushes the fuel into the engine. There is no fuel pump in the gas tank of my Otter. The fuel pumps which have been installed so far (2 by highly recommended VW mechanics, but that's a story best left until my blood pressure cools down) have only been 'pusher' fuel pumps located near the engine. Therefore, the pump isn't getting enough fuel from the tank and after a while, it gets stressed and stops. Hence, the Otter's coughing and dying experiences. There is a universal fuel pump available, which does both the pulling (from the tank) and the pushing (into the engine). My mechanic wants to install this and it sounds sensible to me. Does it sound sensible to you? Thanks for any input. Pat 1982 Vanagon w/87 Jetta engine - Otter
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