Post to the EFV-8 Forum
Post Classified Ads
Shop the Online Store

User Login

Not Registered Yet? Click Here to Sign Up!

Early Ford V-8 Club Forum

FORUM RULES: Users agree to these Rules when using Forum.

The site administrator reserves the right to change the terms and conditions of the user agreement without prior notice to the user. It is the responsibility of the user to regularly review the terms of this agreement.

The user agrees to the following terms:

All information that you provide to us for your membership is correct.
You will not use your membership to spam, harrass, or exploit other members in any way.
Vulgar, Abusive, Racist and Sexist Language will not be tolerated.
Commercial-type sales postings will not be allowed.
No mass posting or flooding of the boards is allowed.
No Advertising of parts or cars; no Ebay or business/commercial ads (please use the "Classified" for ads Wanted or For Sale).
VIEWING MULTIPLE TOPICS ON SCREEN: You can choose to see more than 10 Topics at a time ... Log In and choose "Preferences" from the top bar on the Forum page. Scroll down and Change the "Default Topics Returned" parameter to 25 or 50, and save the changes. Since this setting is stored in your browser 'cookies' (if enabled), it seems to use that stored value even if you are not logged in. So, if you use a PC that you haven't logged into the forum from, the setting still seem to remain at the default.
EXTERNAL PHOTO LINKS ON FORUM: You can still use external photo links in your posts on the new forum. They follow the rules of any link in that they have to have the URL link qualified down to the full image file name (example: .jpg). The links will open in a new browser window, the same as an uploaded image attached to a post. Since an image attachment to any post does not display inline with the post, the results are the same. You can use multiple external links within a post. This link is from photos on a site from Don Clink's 'Deuce@75' albums:

http://donclink.com/deuce_75_1/images/dscn2950.jpg

Using links from photo sites such as Photobucket can help in "size" issue with uploaded attachment files. For best viewing in web browsers, photos should be around the 800x600 pixel range, and probably not more than 1024x768. Most cameras today store HUGE jpg image files, as the default settings are in the 7, 8, 10, and 12Mb image sizes. The image files that are then attached are very large, and the browser can't display the full image size without using the scroll bars. Use the re-sizing functions of your photo editing software to reduce the image to 800x600, which reduces the file sixe and the image load time in the browser. Don uses Google's free Picassa3 software, which is an excellent photo management product. All of the photo albums of the Deuce, Grand National, and Auburn that are links on the NORG site were built using Picassa's web creation functions. And it's free? (THANKS to Don Clink for the info!)
HOW DO I SHOW MY EMAIL ADDRESS ALONG WITH MY USERNAME? You can LogIn on the Forum, and select PREFERENCES. On this page Members can add optional information such as their City,State, Country; Occupation; Hobbies: list a Homepage; list AOL Instant Messanger Handle; Signature; "Make Email Address viewable to others;" and even change the number of Default Topics shown on a page. WHEN others click on your profile, they will see this information.

EFV-8 Club Forum / General Ford Discussion / TomO - Fuel Pump Testing

Reply to Discussion | New Discussion

<< previous || next >>

Posted By

Discussion Topic: TomO - Fuel Pump Testing -- page: 1 2

len47merc

04-01-2016 @ 11:21 AM

reply profile send p.m.

Senior
Posts: 1165
Joined: Oct 2013

Quick follow-up on this and endorsement of TomO's process - followed Tom's process for fuel pumping testing and was not only surprised but also quite impressed by how quickly the root cause was identified. Long story short the glass bowl seal was leaking vacuum but not fuel. Pump initially would pull 8-9 lbs of vacuum and quickly (less than 2 secs) fall back to zero after each stroke - even with a firm additional tightening of the thumb wheel underneath. After removing the bowl, cleaning both it and the rubberized cork seal, reinstalling both (flipped the seal) and tightening the thumb screw securely the pump now produces 15 lbs of vacuum with 5-6 strokes and holds above 11 lbs for over 5 minutes. Problem solved.

Thanks Tom for the article and process you published in the V8 Times - huge time saver and very effective for me. Learned quite a bit in the process as well. Really appreciate it. Suggest everyone find the article if you can and keep it in your library archives for future use.

Steve

rsh1950

03-22-2016 @ 4:35 PM

reply profile send p.m.

Member
Posts: 35
Joined: Jan 2016

Thanks to Ken ct and TomO for your input.
So, I got the new glass bowl gasket today and installed it. I primed the carb. and the fuel bowl filled as it should. I drove the car for about five miles and everything was good.
Before the new gasket was installed the bowl was filling to about 80 or 90% and I could see the fuel pumping in about every 10 to 15 sec. Now with the new gasket, it fills to the top and I don't see the fuel dumping in as before.
So I think it is fixed (fingers crossed) until the next thing pops up.
Thanks for all the input.
rsh1950

TomO

03-22-2016 @ 8:34 AM

reply profile send p.m.

Senior
Posts: 7256
Joined: Oct 2009

rsh1950,

If the sediment bowl gasket does not fix your problem, check the glass bowl for chips as Ken ct recommended and also check the fuel pump for distortion where the glass bowl mounts. If the bowl mounting screw was over tightened, the mounting surface could be bent, preventing a good seal. If so replace the pump.

The flex line can look good on the outside, but the inside could be mush, blocking fuel flow. The crimps on the flex line can also fail, allowing the pump to suck air instead of gas.

You could also have an obstruction in the fuel line or the tank pickup. The tank could be rusting due to the ethanol in the fuel, and the flakes could be plugging the fuel line. A noisy pump is a good indication of this problem.

I would do the fuel delivery test and if the pump is not delivering enough fuel, try clearing the line and pickup with some compressed air and recheck. If the recheck show good delivery, have your tank cleaned and coated with an ethanol resistant coating.

Tom

ken ct.

03-21-2016 @ 5:31 PM

reply profile send p.m.

Senior
Posts: 1513
Joined: Jan 2010

You must have a VENTED gas cap on these models. Also you must use the available cork ones (not rubber one). On the glass bowl , make sure you have NO nicks or chips on the glass edge. omo ken ct. This is ment for rsh 1950 /// my mistake Steve sorry.

This message was edited by ken ct. on 3-21-16 @ 6:21 PM

rsh1950

03-21-2016 @ 5:21 PM

reply profile send p.m.

Member
Posts: 35
Joined: Jan 2016

Interesting subject...I have a 50 Custom and when I first crank it (often after priming it) it will sit and idle for about a minute and just go dead. I keep priming and starting until it will sit and idle (now this might be normal). However when I drive it for a mile or two it just wants to die, so I put it in second and restart the motor and it will do it again in about 1 mile or so. I saw a leak at the glass bowl @ the fuel pump so I have a new gasket coming tomorrow.
Another question: I watch the glass (fuel pump) bowl while the car is idling and I can see the pump discharging fuel into the top of the bowl about 15 seconds. Is the normal?
I will install the new gasket tomorrow and test drive however, I am not convinced that the leak a the bowl is the problem.
I will keep reading your threads.
thanks.......rsh1950

len47merc

03-20-2016 @ 10:04 AM

reply profile send p.m.

Senior
Posts: 1165
Joined: Oct 2013

Thanks Tom -

Steve

TomO

03-20-2016 @ 8:37 AM

reply profile send p.m.

Senior
Posts: 7256
Joined: Oct 2009

I don't know a good way to diagnose a collapsing flex line other than removing and examining it. If the inner lining is going to restrict flue flow, it will also do it at idle, it just won't be noticeable in performance.

The fuel delivery test will usually show any impediment to fuel flow.

Tom

len47merc

03-18-2016 @ 9:46 AM

reply profile send p.m.

Senior
Posts: 1165
Joined: Oct 2013

Thanks Tom and 1932BB. One last question - what is the best way to diagnose whether the flex hose between the firewall and fuel pump is collapsing at speed (55 mph)? By the time one stops and gets out of the car the vacuum will have dissipated and the hose returned to its original shape - ?

Steve

1932BB

03-18-2016 @ 8:48 AM

reply profile send p.m.

New Member
Posts: 104
Joined: Oct 2009

Steve, You mention a "clear fuel filter". I have had trouble when using them between the tank and pump. They work best between the pump and carb, needing pressure to push adequate fuel flow. Something to try

TomO

03-18-2016 @ 8:04 AM

reply profile send p.m.

Senior
Posts: 7256
Joined: Oct 2009

Steve,

Yes the fuel delivery test is appropriate for all 32-53 Ford and Mercury cars.

Yes to the fuel pump pressure.

I doubt that the fuel line is completely draining back into the tank. It would defy the laws of physics that a liquid will seek to maintain a level. The fuel in the tank is higher than most of the line until just before the line reaches the clamp on the firewall.

If it is taking a long time to prime the carburetor, check the flex line and the gasket for the sediment bowl for leaks. These can leak air and not fuel when the pump creates a vacuum.

I will send you a copy of the article that I wrote for the V-8 Times a few years ago.

Tom

<< previous || next >>

PAGE: 1 2

NOTE: YOU MUST BE A REGISTERED USER AND BE LOGGED IN TO POST (and reply to) messages in this forum. If you are a first time user, please click the CREATE A NEW ACCOUNT in the masthead above to register and Log In. After that, all you do is LOG IN to enjoy using this site.

DISCLAIMER: The V-8 Club does no independent testing of any of the opinions, thoughts or suggestions presented in the website on the Forum, in the Tech Tips section, or any section. A reader should consider the website to be a forum wherein differing solutions to a particular set of circumstances may be discussed. Ultimately, the selection of an item for an individual's vehicle must be based upon the independent study of the vehicle owner in consultation with people in the hobby and restoration experts.

Early Ford V-8 Club Forum

Merchandise Questions

Membership Questions