Joined
·
38 Posts
Discussion Starter · #1 ·
Deville base 2001.
The car was worked on my mechanics. Where does the hose connect from? I'm a stranger to fuel systems and I need baby talk on this. What would be some observable symptoms of a missing vacuum hose? Thanks..
2004 Deville, Silver, Gone, but not forgotten, 1972 Eldorado, 1974 eldorado, 1975 CDV
Joined
·
793 Posts
One side goes to the throttle body the other side goes to the regulator, without it the regulator cannot adjust the fuel pressure. you can replace it with a piece of 1/8" vacuum hose available at any parts store. If your mechanic is that careless you should find someone else.
2002 F55 STS, 2014 Explorer XLT, F-150s
Joined
·
75,565 Posts
Here's your vacuum diagram.
As posted, use a single piece of correct sized vacuum hose (dirt cheap) from any parts shop. Ask the counter people - they'll fix it for you. Leave the engine beauty cover at home.
Joined
·
38 Posts
Discussion Starter · #4 ·
Here's your vacuum diagram.
As posted, use a single piece of correct sized vacuum hose (dirt cheap) from any parts shop. Ask the counter people - they'll fix it for you. Leave the engine beauty cover at home.
View attachment 574943
View attachment 574942
Thanks. I found it. It had broken off. Is it okay if I just wrap it around the FPR stem with a broken off end?
2002 F55 STS, 2014 Explorer XLT, F-150s
Joined
·
75,565 Posts
Replace the entire pipe - and rubber connectors - with a single length of common vacuum hose from any parts store. Those dinky plastic pipes break with great regularity - pretty old, now.
If you don't replace the pipe/hose you'll have a pretty significant vacuum leak at the throttlebody fitting = codes, rotten gas mileage, and poor engine performance.
2001 eldorado,2008 DTS,2005 XLR, ','95 eldo,' ,'11CTS-V,'66 corvair.'03 deville,'00 deville
Joined
·
2,202 Posts
Sub's right, replace with rubber. You'll never get a seal using your method. No offense.
Those plastic vacuum lines will break just LOOKING at them.
Age and heat have done them in.
Joined
·
38 Posts
Discussion Starter · #7 ·
Replace the entire pipe - and rubber connectors - with a single length of common vacuum hose from any parts store. Those dinky plastic pipes break with great regularity - pretty old, now.
If you don't replace the pipe/hose you'll have a pretty significant vacuum leak at the throttlebody fitting = codes, rotten gas mileage, and poor engine performance.
View attachment 574947
This line had been broken for a long time (months) and I've never had any codes or poor engine performance.
Will purchase the rubber stuff. Thanks.
2002 F55 STS, 2014 Explorer XLT, F-150s
Joined
·
75,565 Posts
If the car is a city people mover and never used for highway or hard driving you might not notice the fuel pressure differences. My guess is that your gas mileage will improve along with other small improvements.
That vacuum line is absolutely necessary for correct fuel pressure control to the fuel injectors under all operating conditions.
Posted by: tarrantglenn469.blogspot.com
Source: https://www.cadillacforums.com/threads/fuel-pressure-regulator-vacuum-hose-missing.1091501/
