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73-87 Chevy _ GMC Trucks => Engine/Drivetrain => Topic started by: kmanrsss on October 09, 2012, 07:48:46 PM

Title: 87 emisions/vacuum routing diagram
Post by: kmanrsss on October 09, 2012, 07:48:46 PM

Does anyone have a link for a good vacuum/emissions routing diagram? the one on my rad support is gone/unreadable and the haynes book i have doesn't have a good diagram. trying to figure out what goes where as ive got lines unplugged, broken, cracked and even a few ports on the TBI that are just open. thanks for the help. its an 87 v20 w/350 by the way. thanks

Title: Re: 87 emisions/vacuum routing diagram
Post by: Captkaos on October 12, 2012, 08:53:46 AM

I can post a picture of my 87 R10, I have to check on the 91 R3500, but there isn't much on a V20, as far as vacuum.  Just hoses going to the canister purge and to the MAP sensor.  Post a pic of what you have/need.

Title: Re: 87 emisions/vacuum routing diagram
Post by: DnStClr on October 12, 2012, 10:10:42 AM

There have been a bunch of discussions about vac lines and stuff. One link for the routing was from alldata website.
http://www.alldatadiy.com/

Title: Re: 87 emisions/vacuum routing diagram
Post by: kmanrsss on December 28, 2012, 03:40:22 PM

not sure how i missed these replys. Im looking for mostly TBI connections. I will get a few pis this weekend. Thanks

Title: Re: 87 emisions/vacuum routing diagram
Post by: csdineley on December 28, 2012, 08:51:30 PM

Hope this helps, it's from my 87 R20 350.

Title: Re: 87 emisions/vacuum routing diagram
Post by: VileZambonie on December 29, 2012, 01:24:21 AM

http://forum.73-87chevytrucks.com/smforum/index.php/topic,16074.msg125910.html#msg125910