engine compression? - Page 3 - Alfa Romeo Bulletin Board & Forums
Reply
 
LinkBack Thread Tools Display Modes
post #31 of 35 (permalink) Old 02-23-2015, 10:08 PM
You can check for air leaks by spraying starter fluid around the mounts. Some use propane gas. If the motor speeds up you likely have a leak.

The Brad Davisson Memorial Scholarship Fund:

To view links or images in signatures your post count must be 0 or greater. You currently have 0 posts.
gprocket is offline  
Sponsored Links
Advertisement
 
post #32 of 35 (permalink) Old 02-23-2015, 10:23 PM Thread Starter
Registered User
 
JimPunkrockford's Avatar
 
Join Date: Mar 2012
Location: hawaii
Posts: 107
Quote:
Originally Posted by gprocket View Post
You can check for air leaks by spraying starter fluid around the mounts. Some use propane gas. If the motor speeds up you likely have a leak.
ahh that's what i was looking for. thanks i will give that a try.
JimPunkrockford is offline  
post #33 of 35 (permalink) Old 02-25-2015, 11:48 AM Thread Starter
Registered User
 
JimPunkrockford's Avatar
 
Join Date: Mar 2012
Location: hawaii
Posts: 107
Quote:
Originally Posted by gprocket View Post
You can check for air leaks by spraying starter fluid around the mounts. Some use propane gas. If the motor speeds up you likely have a leak.
okay, this may be something. here is a video of the test. it is hard to tell because of such funky idling but maybe....

JimPunkrockford is offline  
Sponsored Links
Advertisement
 
post #34 of 35 (permalink) Old 07-29-2019, 11:47 AM
Senior Member
Gold Subscriber
 
Join Date: Oct 2013
Posts: 665
Garage
The theory of introducing some flammable gas into the intake manifold works. We recently did exactly that and appeared to find the culprit with the soft mounts. New soft mounts and $120.00 later the loping idle and lack of a decent reading with our vacuum gauge leads me to believe the starting fluid test did not perform as intended. Not sure where to go from here, has anyone had luck with the "smoke test" for vacuum leaks in the intake system?

Yes, we are off topic
930cabman is offline  
post #35 of 35 (permalink) Old 07-30-2019, 10:16 AM
Registered User
 
slowcreek's Avatar
 
Join Date: Jul 2005
Location: Prescott, Az
Posts: 1,072
Garage
Quote:
Originally Posted by 930cabman View Post
The theory of introducing some flammable gas into the intake manifold works. We recently did exactly that and appeared to find the culprit with the soft mounts. New soft mounts and $120.00 later the loping idle and lack of a decent reading with our vacuum gauge leads me to believe the starting fluid test did not perform as intended. Not sure where to go from here, has anyone had luck with the "smoke test" for vacuum leaks in the intake system?

Yes, we are off topic
The problem with starting fluid is that it mostly evaporates before reaching the suspected vacuum leak source. I use brake cleaner or carb cleaner. You can use water if you like. You'll know when it hits the leak......

It's Giuseppe's giubos, not Guido's guibos, on my 78 Spider and Sport Sedan
REFRESH CONNECTIONS BEFORE REPLACING COMPONENTS
slowcreek is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Alfa Romeo Bulletin Board & Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in










Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

 
For the best viewing experience please update your browser to Google Chrome