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General Information => Troubleshooting => Topic started by: auag on October 31, 2016, 11:14:48 pm

Title: no vacumm on injector pump
Post by: auag on October 31, 2016, 11:14:48 pm

on my 81 vw diesel caddy ...it set for about 6 months and now i have no vacumm coming from the injector pump...it wont pull any fuel from the tank...i have cleaned both fuel lines and still nothing..i put a vacumm gauge on the pump and no vacumm..any ideas on a cheap fix?

Title: Re: no vacumm on injector pump
Post by: libbydiesel on November 01, 2016, 12:55:58 am

Add a lift pump.  Run it for a while that way.  Remove the lift pump and see if it is cured. 

Title: Re: no vacumm on injector pump
Post by: auag on November 01, 2016, 01:37:06 am

thanks for the reply...any recommendations on a lift pump?

Title: Re: no vacumm on injector pump
Post by: vanbcguy on November 01, 2016, 09:36:32 pm

Anything putting out a fairly high flow rate which you can draw fuel through when not operating will work. There are quite a few Facet Posi-Flow pumps which are suitable. Keep the pressure below 10 PSI or you may end up with leaks at the pump shaft.

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Title: Re: no vacumm on injector pump
Post by: air-cooled or diesel on November 02, 2016, 01:38:24 am

huh, cause on mine they will no longer prime theirselves, so i prime in line; pull off fuel filter, and manually prime, if needed it keeps/gets me going.

Title: Re: no vacumm on injector pump
Post by: fatmobile on January 03, 2017, 03:41:17 pm

Quote from: auag on October 31, 2016, 11:14:48 pm

on my 81 vw diesel caddy ...it set for about 6 months and now i have no vacumm coming from the injector pump...it wont pull any fuel from the tank...i have cleaned both fuel lines and still nothing..i put a vacumm gauge on the pump and no vacumm..any ideas on a cheap fix?

If everything is  moving right there should be NO vacuum at the front of the pump.
Got clear fuel lines?