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Old 02-09-2015, 02:11 AM   #1
ellisjay2
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Join Date: Feb 2014
Location: marietta ga
Posts: 147
Re install vacuum lines for gas milage gain

I went the remove all vacuum lines and just plug them off deal as most have told me to do since we dont need emissions, but I just want to do all little things to get better smoother idle, better vacuum to brakes, and anything to add help towards fuel/air mixture on quad 4 barrel carb. A friend was telling me if you think about it when they first built these trucks, they put the vacuum lines there for a reason even though we can void/not use them as for pollution prevention.
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: Eli540

86 gmc 2500 longbed Carb 5.7, rwd,
400 tranny.
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Old 02-09-2015, 10:03 AM   #2
enaberif
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Join Date: Jan 2009
Location: Calgary, AB
Posts: 1,181
Re: Re install vacuum lines for gas milage gain

Quote:
Originally Posted by ellisjay2 View Post
I went the remove all vacuum lines and just plug them off deal as most have told me to do since we dont need emissions, but I just want to do all little things to get better smoother idle, better vacuum to brakes, and anything to add help towards fuel/air mixture on quad 4 barrel carb. A friend was telling me if you think about it when they first built these trucks, they put the vacuum lines there for a reason even though we can void/not use them as for pollution prevention.
The only vacuum lines you need is distributor advance, transmission (if TH350), brake booster and pcv valve. Any other vacuum lines do diddly squat.

If you want all the things you are saying then you need a vacuum gauge and find out the reasons why you have poor idle and brakes for. These things are usually a worn out engine or vacuum leaks somewhere.
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