Fordmods Logo

How do i find a vacuum leak? 

 

Page 1 of 2 [ 17 posts ] Go to page 1, 2  Next

 
 Post subject: How do i find a vacuum leak?
Posted: Mon Jun 13, 2005 4:38 pm 
Tyre Shredder
Offline

Age: 37

Posts: 379

Joined: 28th Feb 2005

Location: Meekathara
WA, Australia

I have problems with my car idling for months now - and yes i have replaced and checked everything at much expense.
I think it must be a vacuum leak - i can sometimes hear a slight whistle sound when i let my foot back on the throttle - like when going down a hill or rolling up to the lights. I am not sure if this sound relates to the vacuum leak or not.

The question is - how do i find where the leak is coming from?

My car is an ef xr6 manual.
Top
 Profile  
 
 
Posted: Mon Jun 13, 2005 4:42 pm 
Technical Contributor
Offline
User avatar

Age: 39

Posts: 5855

Joined: 5th Nov 2004

Gallery: 8 images

Ride: '95 EF's

Location: Leederville
WA, Australia

spray the intake manifold with carby clean to find where it is! :)

 

_________________

R.I.P. Scotty

Top
 Profile  
 
 
Posted: Mon Jun 13, 2005 4:45 pm 
Getting Side Ways
Offline
User avatar

Age: 50

Posts: 10128

Joined: 5th Nov 2004

Gallery: 4 images

Ride: EF Gli Ghia, XP Fairmont

Location: Perth
WA, Australia

fill your engine bay up with selleys no more gaps!!!

 

_________________

Owning 1 of 67612 EF GLi Sedans made
FACT: "Chuck Norris owns the greatest Poker Face of all-time. It helped him win the 1983 World Series of Poker despite him holding just a Joker, a Get out of Jail Free Monopoly card, a 2 of clubs, 7 of spades and a green #4 card from the game Uno."

Top
 Profile  
 
 
Posted: Mon Jun 13, 2005 9:12 pm 
Getting Side Ways
Offline
User avatar

Age: 60

Posts: 4102

Joined: 18th Nov 2004

Gallery: 10 images

Ride: PX2 Ranger 4x4 XLT Dual CAB

Location: Carrum Downs
VIC, Australia

Happy wrote:
fill your engine bay up with selleys no more gaps!!!


Haha. There's always one clown in the group. :roll:

 

_________________

Image
She's meanness put to music and the b**ch is born to run!
Like the sign says, "speed's just a question of money. How fast can you go?"

Top
 Profile  
 
 
Posted: Mon Jun 13, 2005 9:17 pm 
Tyre Shredder
Offline

Age: 37

Posts: 379

Joined: 28th Feb 2005

Location: Meekathara
WA, Australia

Sensible answers only please - this vacuum leak has cost me over $600 in changing parts but with not sucess. The time for jokes is over - I am going to sell the falcon if i cant fix it soon. Wonder if i can get a good trade in on an x pursuit VN commodore. Should be able to get a VT style body kit to suit with the change!
Top
 Profile  
 
 
Posted: Mon Jun 13, 2005 9:21 pm 
Technical Contributor
Offline
User avatar

Age: 39

Posts: 5855

Joined: 5th Nov 2004

Gallery: 8 images

Ride: '95 EF's

Location: Leederville
WA, Australia

as i said - spray carby-clean on the intake manifold!

 

_________________

R.I.P. Scotty

Top
 Profile  
 
 
Posted: Mon Jun 13, 2005 9:31 pm 
Stock as a Rock
Offline
User avatar

Age: 41

Posts: 169

Joined: 30th Nov 2004

Gallery: 5 images

Ride: ef falcon

Location: perth
WA, Australia

any flamable spary will work jus spray it on sections at a time if ur engine picks up it means its got a vacuum leak.

 

_________________

stage2cam,lukeyheaders,highflowcat2 1/2, 2 1/2 exhaust 3 hotdogs, 17x235/45 17x255/40's

Top
 Profile  
 
 
Posted: Mon Jun 13, 2005 10:22 pm 
Getting Side Ways
Offline

Age: 39

Posts: 1494

Joined: 1st Dec 2004

Gallery: 2 images

Ride: BA MkII XT Wagon

Location: Maitland
NSW, Australia

wat have u changed? if could be as easy as u have left a vacuum hose off somewhere

but yea, just spray carby cleaner all over the intake and listen for a rise is revs or just the carby cleaner being sucked in

thats the easiest way

 

_________________

Image

Top
 Profile  
 
 
Posted: Mon Jun 13, 2005 10:31 pm 
Getting Side Ways
Offline
User avatar

Age: 70

Posts: 3555

Joined: 7th Nov 2004

Gallery: 4 images

Power: 482 rwkw

Location: Penrith
NSW, Australia

A hose to ear and suspect area's is another way...
Like Dr's stephoscope [sp]?

 

_________________

As in ZOOM 126 edition
331 Dart block,3.25/ 4340 steel crank, Oliver rods,TFS ported track heat heads, TFS track heat inlet Twin SC61 turbo's
Project 1UZ-EF has started.. S475 Turbo 4.0 V8 Mustang Celica.....

Top
 Profile  
 
 
Posted: Tue Jun 14, 2005 12:18 am 
Getting Side Ways
Offline
User avatar

Age: 40

Posts: 1680

Joined: 5th Nov 2004

Gallery: 1 images

Ride: 220kw 1600 Datto

Location: Scaaabz
WA, Australia

also, try spraying a water/deturgent mix.

 

_________________

Image

Top
 Profile  
 
 
Posted: Tue Jun 14, 2005 4:22 pm 
Getting Side Ways
Offline

Posts: 791

Joined: 18th Mar 2005

Gallery: 4 images

Location: Adelaide
SA, Australia

I was gunna say use detergent /water mix.... um, a bit more safe than `spray any flammable liquid....' All you want is to momentarily block the leak ( whichh the detergent spray will do) and you will hear the revs rise or maybe a temporary end to the vaccum leak noise... the idea is to pinpoint it down then maybe try some sealant to try and eliminate it...

 

_________________

351 4V XB Coupe running LPG

Top
 Profile  
 
 
Posted: Tue Jun 14, 2005 4:44 pm 
Tyre Shredder
Offline

Age: 37

Posts: 379

Joined: 28th Feb 2005

Location: Meekathara
WA, Australia

Thanks all - i will give it a go tonight.
I am not sure whether it is related or not but this morning when i went to drive the car the brake booster was not working. I am assuming it was the brake booster as the pedal felt like a rock - like when the engine is not running.

Is it possible that there was/is some kind of leak between the manifold and the booster?
Top
 Profile  
 
 
Posted: Tue Jun 14, 2005 6:42 pm 
Technical Contributor
Offline
User avatar

Posts: 2799

Joined: 6th Nov 2004

Gallery: 7 images

Ride: Falcon

Location: Sydney
NSW, Australia

lol, I was just about to say its your brake booster. Take the hose off the brake booster, and shove a bolt in it, try again... if it idles there you go.

Mate of mine had the same problem. The diaphram on those things goes, and then its a leak.


Cheers

 

_________________

;++JustForDimSim++;

Cheap, fast and reliable.. choose 2.

Top
 Profile  
 
 
Posted: Tue Jun 14, 2005 6:45 pm 
Site Admin
Offline
User avatar

Age: 41

Posts: 8833

Joined: 18th Dec 2002

Gallery: 6 images

Ride: AUII V8 LTD

Power: 270 rwkw

Location: Sydney
NSW, Australia

Yeh, when the booster went on my waggin, she actually started to idle a little more sensibly! (vac leak) :D

 

_________________

WAG363: AUII LTD Supercharged 363 Dart Stroker [Supercharged 363 LTD Build]
WAGGIN: 2012 Volkswagen Passat Wagon - V6 4Motion.

Top
 Profile  
 
 
Posted: Tue Jun 14, 2005 6:46 pm 
Tyre Shredder
Offline

Age: 37

Posts: 379

Joined: 28th Feb 2005

Location: Meekathara
WA, Australia

THanks for the booster advice - i will giove it a go tonight.

Any suggestions on fixing the booster? When you say the diaphram goes are you suggesting i will probably need a new booster?
Top
 Profile  
 
Display posts from previous:
Sort by  
 Page 1 of 2  [ 17 posts ]  Go to page 1, 2  Next

Who is online

Users browsing this forum: Google Adsense [Bot] and 51 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

 

 

It is currently Sat Mar 30, 2024 12:28 am All times are UTC + 11 hours

 

 

(c)2014 Total Web Solutions Australia - Australian Web Hosting and Domain Names