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not starting on 2001 Volkswagen Jetta TDI

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i have a 2001 jetta tdi when u go to start it in the morinig it wont start i replaced the glow plugs wire harness and relay when its cold out it starts right up but after it runs and it sits for 2 to 4 hrs dosnt start unless you shoot a little either in it
(1) Answer
I think you may have an injection pump problem or a clogged fuel filter.
Get it checked by a VW expert or a Diesel shop that'll work on a VW.
Caution: Be VERY careful with ether, it's explosive and can blow your engine apart, causing property damage, injury or death. No joke, Bill..
If you want to find a specialist, here's a directory link for you:
https://repairpal.com/directory?address=12524&car_brand_names=Volkswagen