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73-87 Chevy _ GMC Trucks => 73-87 Chevy & GMC Trucks => Topic started by: JBerryhill on January 01, 2009, 06:08:58 pm

Title: Need help.....again
Post by: JBerryhill on January 01, 2009, 06:08:58 pm
There is a plate mounted on the passenger side of the throttle body on my 87 GMC 350. It has mutiple parts attached to it but the one in question has a 2 prong plug on the top, a vacuum port on the front and two on the rear. The top most port on the rear on mine only has a 1 1/2 inch piece of rubber tubing on it. Should something be plugged into this port or is it a vacuum relief port? I will include a pic. Thanks Guys....
Title: Re: Need help.....again
Post by: frogman68 on January 01, 2009, 07:03:05 pm
the hose next to it does it go to the Egr ? if so nothing goes on that one thats what it looks like to me 
Title: Re: Need help.....again
Post by: VileZambonie on January 01, 2009, 10:31:00 pm
That's the solenoid filter vent
Title: Re: Need help.....again
Post by: JBerryhill on January 02, 2009, 09:21:17 pm
Thanks everyone, I really appreciate the help. This is my first TBI truck and I'm trying to run down a little stumble it has. So far I have found 2 cracked vacuum lines and a burnt hard plastic line. I found the one mentioned in the earlier post and just wondered if a line was missing from it.  Thanks again, Jerry
Title: Re: Need help.....again
Post by: 78 Chevyrado on January 02, 2009, 10:29:40 pm
That's the solenoid filter vent

yeppers.