I had this issue once; whining fuel pump. Horrible performance at higher elevations and higher ambient temperatures. Totally ruined a Colorado trip in summer. Dennis H. immediately diagnosed. Replaced fuel tank. All good. But.....now just spitballing here, pure conjecture....what about removing screen on outlet of fuel tank and adding a pre-fuel-pump filter? Why did VW put this screen into Fuel Tank? I guess they never thought these bricks would be running over 30+ years. I mean of course you don't want rust and crud traveling downline to injectors, causing even more misery. In my understanding on my 85, they used a little clear plastic filter prior to the fuel pump, but I thought this was mostly to trap stuff following assembly of vehicle. VW later deleted this pre-filter. Just wondering your thoughts and experience. A Facebook Vanagon Owner recently posted of whining fuel pump. Not that I would be brave enough to tackle removing the fuel tank outlet screen; no problems now, no need to attempt, probably won't be for another 30 years. But just thinking through the scenarios. Rich San Diego
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