Reply
 
Thread Tools Search this Thread Display Modes
 
Old 09-05-2016, 01:18 PM   #197
Airstream Driver
 
PeterH-Airstreamer's Avatar

 
1997 30' Excella
1983 31' Airstream310
Austin , Texas
Join Date: Feb 2002
Posts: 3,227
Images: 51
Quote:
Originally Posted by Gregsch View Post
Pulled the plugs and checked compression. !63 -169 psi. Plugs looked good. I am using AC Delco R45TS plugs. Is there a better plug for these old 454"s? I will take a look at the quadrajet today.
Attachment 270861

Attachment 270862
Greg, if you haven't already, check that fine inline filter that is just beyond the fuel inlet of the carb.
__________________

__________________
1983 310 Classic Motorhome
1997 30' Excella Trailer
AIR #13
PeterH-Airstreamer is offline   Reply With Quote
Old 09-05-2016, 04:27 PM   #198
4 Rivet Member
 
Gregsch's Avatar

 
1979 24' Airstream Excella 24
Tipp City , Ohio
Join Date: Feb 2012
Posts: 437
Took her out for a drive today just to see how she runs. Ran the genset for about an hour with the AC running. All was well! Brad you are right running the rooftop AC while driving is not going to be acceptable. The coach is fairly cool but, sitting in front of that big windshield you get really warm. I will have to get that dash air working.
After checking the plugs I just put them back in , they looked fine. It was still stumbling a bit off idle so I put some Lucas fuel conditioner in the tank and drove another 30 minutes. Seemed like it helped and it was running smoother by the minute. After I got home I let it idle for about 10 minutes while I got things ready to back it into the shop. When I got in the drivers seat to back it in the shop it just died. It would not restart. I let it sit for about 45 minutes and went back out and it started right up.
Vapor lock from idling in 90 degree heat?
Related to the issue with the gas tank and it running out of gas when it reads 1/4 tank?
Weak fuel pump? (when I pump the gas pedal the shot of fuel from the accelerator pump seems weak). What is the procedure for testing a mechanical pump? Can I test the pressure while cranking?

Not knowing what is going on I think my next move is replace the fuel pump. I have no history on the pump and it could be 20 or 30 years old.
__________________

__________________
Gregsch is offline   Reply With Quote
Old 09-05-2016, 06:39 PM   #199
Rivet Master
 
Waipio Rim's Avatar
 
1984 31' Airstream310
Honokaa , Hawaii
Join Date: Jun 2010
Posts: 615
Here's a maybe: when my ignition coil was failing, the hotter the engine got, the weaker the spark got. I was guessing at fuel supply problems until it gave out completely and was diagnosed by a mobile mechanic.
__________________
Waipio Rim is offline   Reply With Quote
Old 09-06-2016, 03:49 AM   #200
4 Rivet Member
 
Gregsch's Avatar

 
1979 24' Airstream Excella 24
Tipp City , Ohio
Join Date: Feb 2012
Posts: 437
Quote:
Originally Posted by Waipio Rim View Post
Here's a maybe: when my ignition coil was failing, the hotter the engine got, the weaker the spark got. I was guessing at fuel supply problems until it gave out completely and was diagnosed by a mobile mechanic.
Good point!
What if these two events are related? When I sat on the side of the road thinking I was out of gas, it was in fact a hot ignition. Soo.. after sitting for 1 1/2 hour on the side of the road it cooled off and then restarted. The fact that I added 8 gallons of fuel had nothing to do with it.
Sure glad I did not drop the tank again!
Are these ignition modules suspect? That's what caused this kind of problem on my Ford.
__________________
Gregsch is offline   Reply With Quote
Old 09-06-2016, 05:05 AM   #201
Airstream Driver
 
PeterH-Airstreamer's Avatar

 
1997 30' Excella
1983 31' Airstream310
Austin , Texas
Join Date: Feb 2002
Posts: 3,227
Images: 51
Quote:
Originally Posted by Gregsch View Post
Good point!
What if these two events are related? When I sat on the side of the road thinking I was out of gas, it was in fact a hot ignition. Soo.. after sitting for 1 1/2 hour on the side of the road it cooled off and then restarted. The fact that I added 8 gallons of fuel had nothing to do with it.
Sure glad I did not drop the tank again!
Are these ignition modules suspect? That's what caused this kind of problem on my Ford.
Your plugs do not point to an ignition issues unless you cleaned them. They would have been black and sooty.
__________________
1983 310 Classic Motorhome
1997 30' Excella Trailer
AIR #13
PeterH-Airstreamer is offline   Reply With Quote
Old 09-06-2016, 02:41 PM   #202
Rivet Master
 
bkahler's Avatar

 
1974 20' Argosy 20
Richmond , Kentucky
Join Date: Jan 2003
Posts: 5,791
I wouldn't say the ignition modules are a common failure but they do fail and they aren't the expensive. I would suggest replacing it with a new one and do some more test driving. If the problem doesn't re-occur that very likely wasn't your problem. If it doesn't solve the problem you will at least have a spare on hand for when it does eventually fail.
__________________
Air forums # 1674
1974 20' Argosy Motor Home
1974 31' Excella trailer (parting out, as of 4/1/2015 I have wheels, brake drums, windows & holding tanks left to sell)
bkahler is offline   Reply With Quote
Old 09-11-2016, 05:07 PM   #203
4 Rivet Member
 
Gregsch's Avatar

 
1979 24' Airstream Excella 24
Tipp City , Ohio
Join Date: Feb 2012
Posts: 437
Went to another game this weekend.

Replaced the rotor and the distributor cap along with the coil and the ignition module. All looked ok but, were suspect because they all looked very old, maybe 37 years old. No sign of the issue with it randomly stalling.. I think it was a bad ignition part. I did not try to run the tank below a quarter tank (having too much fun to mess around with that) but, I think I could if I wanted to. I will take a 5 gallon can of fuel with me next week and prove the theory.

Runs perfectly on the highway. Set the cruise on 60 mph and she rolls along effortlessly. About 350 miles , got 8.8 mpg

It still stumbles a little, off idle, but, I put some Lucas injector cleaner in the gas and that seems to be helping.
__________________
Gregsch is offline   Reply With Quote
Old 09-11-2016, 06:32 PM   #204
Airstream Driver
 
PeterH-Airstreamer's Avatar

 
1997 30' Excella
1983 31' Airstream310
Austin , Texas
Join Date: Feb 2002
Posts: 3,227
Images: 51
Greg, just curious if you did check that internal filter at your carb inlet, I mentioned above. Most people have no clue that there is a filter, including myself. I had a very similar problem to yours with my first class C, sudden random stalling and the engine just stopping like there is no fuel. Then an hour later no problem. I finally found that filter to be the problem. Why its random, beats me, may have to do with certain fuel pressure and heat.
Attached Thumbnails
Click image for larger version

Name:	inletfilter.gif
Views:	25
Size:	23.3 KB
ID:	271505  
Attached Images
 
__________________
1983 310 Classic Motorhome
1997 30' Excella Trailer
AIR #13
PeterH-Airstreamer is offline   Reply With Quote
Old 09-12-2016, 03:33 AM   #205
4 Rivet Member
 
Gregsch's Avatar

 
1979 24' Airstream Excella 24
Tipp City , Ohio
Join Date: Feb 2012
Posts: 437
Quote:
Originally Posted by PeterH-Airstreamer View Post
Greg, just curious if you did check that internal filter at your carb inlet, I mentioned above. Most people have no clue that there is a filter, including myself. I had a very similar problem to yours with my first class C, sudden random stalling and the engine just stopping like there is no fuel. Then an hour later no problem. I finally found that filter to be the problem. Why its random, beats me, may have to do with certain fuel pressure and heat.
When I first got the MoHo 4 years ago I dropped the tank and replaced both the filters (the inline filter along the frame rail and the carb inlet filter) . Everything was spotless. That was only 1500 miles ago but, you make a good point. I will check it tonite. Thanks
__________________
Gregsch is offline   Reply With Quote
Old 09-12-2016, 04:17 PM   #206
4 Rivet Member
 
Gregsch's Avatar

 
1979 24' Airstream Excella 24
Tipp City , Ohio
Join Date: Feb 2012
Posts: 437
Quote:
Originally Posted by PeterH-Airstreamer View Post
Greg, just curious if you did check that internal filter at your carb inlet, I mentioned above. Most people have no clue that there is a filter, including myself. I had a very similar problem to yours with my first class C, sudden random stalling and the engine just stopping like there is no fuel. Then an hour later no problem. I finally found that filter to be the problem. Why its random, beats me, may have to do with certain fuel pressure and heat.
Ok Peter, I took the fuel filter off at the carb inlet. Looking closely at the filter I notice it has a little rubber piece that appears to be a check valve. I pulled it out and found a little chuck of rubber ( reminds me of the hanging chads from the Presidential election a few years back) . Looks like the little chunk of rubber was the piece in the side of the check valve that should have been discarded at the factory. I removed it with a dental pick, it fell on the floor and disappeared.
Now my question is how is supposed to go back together? The brass nut that retains the filter has a thin nylon ring that seems to seal it at the carb body. The other end where the steel fuel line attaches looks like a flare fitting but, it has a little black rubber ring where the flair would seat. Is that supposed to be there? Should I be using a gasoline resistant sealer on the threads? Well you asked !

Click image for larger version

Name:	IMG_1972[1].jpg
Views:	33
Size:	345.4 KB
ID:	271578

Click image for larger version

Name:	IMG_1974[1].jpg
Views:	33
Size:	693.7 KB
ID:	271579

Click image for larger version

Name:	IMG_1975[1].jpg
Views:	36
Size:	698.3 KB
ID:	271580
__________________
Gregsch is offline   Reply With Quote
Old 09-12-2016, 05:53 PM   #207
Airstream Driver
 
PeterH-Airstreamer's Avatar

 
1997 30' Excella
1983 31' Airstream310
Austin , Texas
Join Date: Feb 2002
Posts: 3,227
Images: 51
Quote:
Originally Posted by Gregsch View Post
Ok Peter, I took the fuel filter off at the carb inlet. Looking closely at the filter I notice it has a little rubber piece that appears to be a check valve. I pulled it out and found a little chuck of rubber ( reminds me of the hanging chads from the Presidential election a few years back) . Looks like the little chunk of rubber was the piece in the side of the check valve that should have been discarded at the factory. I removed it with a dental pick, it fell on the floor and disappeared.
Now my question is how is supposed to go back together? The brass nut that retains the filter has a thin nylon ring that seems to seal it at the carb body. The other end where the steel fuel line attaches looks like a flare fitting but, it has a little black rubber ring where the flair would seat. Is that supposed to be there? Should I be using a gasoline resistant sealer on the threads? Well you asked !

Attachment 271580

You are not supposed to listen to whatever I may say
I would like to hear others input on this, but I completely removed that filter from my carburetors in the past and only used inline filters that were much easier to maintain.
I would use a gasoline resistant sealer along with the nylon ring.
But do you think that little piece of rubber could have caused some fuel delivery issues or even worse issues later ?
__________________
1983 310 Classic Motorhome
1997 30' Excella Trailer
AIR #13
PeterH-Airstreamer is offline   Reply With Quote
Old 09-12-2016, 05:59 PM   #208
4 Rivet Member
 
Gregsch's Avatar

 
1979 24' Airstream Excella 24
Tipp City , Ohio
Join Date: Feb 2012
Posts: 437
Yes I do. Could very well have been causing the problem. At this point I am concerned that I get it back together in such a fashion that it does not leak. I had a friend whose pick-up truck burnt to the ground a week after his mechanic rebuilt his carburetor. I have visions of ASTailgators Moho burning up. I have come way too far for that.
__________________
Gregsch is offline   Reply With Quote
Old 09-12-2016, 06:08 PM   #209
Airstream Driver
 
PeterH-Airstreamer's Avatar

 
1997 30' Excella
1983 31' Airstream310
Austin , Texas
Join Date: Feb 2002
Posts: 3,227
Images: 51
Quote:
Originally Posted by Gregsch View Post
Yes I do. Could very well have been causing the problem. At this point I am concerned that I get it back together in such a fashion that it does not leak. I had a friend whose pick-up truck burnt to the ground a week after his mechanic rebuilt his carburetor. I have visions of ASTailgators Moho burning up. I have come way too far for that.
I hear you, I found a missing fuel hose clamp right above the exhaust and a leaking throttle body on my FI, so I can appreciate your concern.
But knowing your history of how you do things, I doubt you would even leave the driveway without having checked and doubled checked for leaks.
Still would like to get others input if that filter (and check valve) is better off in the junk pile
__________________
1983 310 Classic Motorhome
1997 30' Excella Trailer
AIR #13
PeterH-Airstreamer is offline   Reply With Quote
Old 09-12-2016, 07:11 PM   #210
4 Rivet Member
 
Gregsch's Avatar

 
1979 24' Airstream Excella 24
Tipp City , Ohio
Join Date: Feb 2012
Posts: 437
Agreed. Hopefully someone with experience with quadrajets will chime in with some sound advice.
__________________

__________________
Gregsch is offline   Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not 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


Similar Threads
Thread Thread Starter Forum Replies Last Post
WDCU Kick off Rally at Compton Basset Park airstreamhobo WBCCI Rallies & Events 8 05-04-2014 03:15 PM
475 transmission kick down switch montreal Classic Motorhomes 1 06-07-2012 05:38 PM
Great Backyard Bird Count Barbara Peerenboom Off Topic Forum 8 03-04-2005 09:10 PM
Why do I love my AS? Let me count the ways... Stefrobrts On The Road... 8 07-28-2003 05:36 PM


Virginia Campgrounds

Reviews provided by



Our Communities

Our communities encompass many different hobbies and interests, but each one is built on friendly, intelligent membership.

» More about our Communities

Automotive Communities

Our Automotive communities encompass many different makes and models. From U.S. domestics to European Saloons.

» More about our Automotive Communities

Marine Communities

Our Marine websites focus on Cruising and Sailing Vessels, including forums and the largest cruising Wiki project on the web today.

» More about our Marine Communities


Copyright 2002- Social Knowledge, LLC All Rights Reserved.

All times are GMT -6. The time now is 12:51 AM.


Powered by vBulletin® Version 3.8.8 Beta 1
Copyright ©2000 - 2017, Jelsoft Enterprises Ltd.

Airstream is a registered trademark of Airstream Inc. All rights reserved. Airstream trademark used under license to Social Knowledge LLC.