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i.p pump 1980 300d under vaccum

Submitted by AaronP on 29 August 2008 - 5:25pm.

why does the primer pump act like it is under vaccum? i have tried to prime the i.p. pump up but, when i pull the primer plunger up it is very hard to pull and will "snap" out of my hand if i let it go. then the fuel in the filter "boils" with air bubbles. anyone else have this happen? 1980 300d .. been sitting for years. car starts but dies.

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tank vent or screen may be plugged up

29 August 2008 - 5:34pm
300SD_RenoNV

it's possible your tank vent is plugged. Try it with the fuel cap off. If nothing changes, the tank screen where the main fuel line comes out of the tank is probably plugged with settiment from sitting. To verify you can use a small bottle of fuel under the hood hooked to the main inlet in place of the tank to see if she'll run. If it does, than it's time to drain the tank and clean the screen filter. Good luck!

thanks Reno i will get back to you when i get the chance

1 September 2008 - 2:17am
AaronP

THANKS

ASP