redoing vacuum lines
Thread Starter
|
Senior User
Joined: Oct 2018
Posts: 166
Likes: 0
redoing vacuum lines
I have a 94 f350 with a 351 and e4od I'm going to redo the vacuum lines because they are a mess and I suspect vacuum leaks any advice? what can I do away with I'm going to probably do a egr block off if that matters
Fleet Mechanic
Joined: Aug 2015
Posts: 1,829
Likes: 362
From: Candy Mountain
There will be no performance gain from blocking the EGR or removing the AIR system. If you want to do it, that's great. It is your truck. Just don't kid yourself about it being an improvement.
The vacuum system seems to be daunting bunch of spaghetti for a lot of folks. My advice is to remove and replace one section at a time in a methodical manner. If it helps map it out before you start messing with it. Don't try to cut stuff out to make things simpler. Everything is there and routed the way it is from the factory for a reason. There is a line going into the cab and one line coming out of the cab in wire bundle by the HVAC blower. These are the hardest to deal with. I put in transitions instead of trying to force new lines through the bundle into the cab.
Don't forget about the PCV, EVAP, and Brake Booster lines.
You can test for vacuum leaks with a hand vacuum pump, so you can find any faulty hard parts while you are in there. The EGR control solenoid leaks vacuum in the off position by design.
I have had great luck with Gates EEC vacuum hose. It says "NOT FOR FUEL INJECTION" all over it, but that is because it isn't meant to be used as fuel line in a high pressure system. It is a great under hood hose in low pressure services.
The vacuum system seems to be daunting bunch of spaghetti for a lot of folks. My advice is to remove and replace one section at a time in a methodical manner. If it helps map it out before you start messing with it. Don't try to cut stuff out to make things simpler. Everything is there and routed the way it is from the factory for a reason. There is a line going into the cab and one line coming out of the cab in wire bundle by the HVAC blower. These are the hardest to deal with. I put in transitions instead of trying to force new lines through the bundle into the cab.
Don't forget about the PCV, EVAP, and Brake Booster lines.
You can test for vacuum leaks with a hand vacuum pump, so you can find any faulty hard parts while you are in there. The EGR control solenoid leaks vacuum in the off position by design.
I have had great luck with Gates EEC vacuum hose. It says "NOT FOR FUEL INJECTION" all over it, but that is because it isn't meant to be used as fuel line in a high pressure system. It is a great under hood hose in low pressure services.
Thread
Thread Starter
Forum
Replies
Last Post
MilePostZero
1987 - 1996 F150 & Larger F-Series Trucks
6
Sep 4, 2018 10:54 AM
paintslinga2010
1987 - 1996 F150 & Larger F-Series Trucks
4
Nov 15, 2015 08:51 PM
Smidgy
1987 - 1996 F150 & Larger F-Series Trucks
6
Apr 25, 2012 01:08 PM
guitar_199
1987 - 1996 F150 & Larger F-Series Trucks
11
Feb 7, 2006 11:04 AM
